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1. ccecceeeeseeeeeeeeeeeeeeeeeeeeees 148 4 3 6 Load Element Instructions into the Instruction LiSt cccccceeeeeeeeeeeteeeeeeeeees 148 4 3 7 Load Load Instructions into the Instruction List c ceeeeeeeeeeeeeeeeeeeeeeeeeeeeees 148 4 4 PLOT TOOLBAR aiiai actors E Bile dada ao lade pekinpantsti 149 4 4 1 Rotate the Model to the Left eee eecccceeeceeeeeeeeeeeseeeaeeeeeeeeeeeeessenseeeeeeeeeees 150 4 4 2 Rotate the Model to the RIQNt c ccccceeeeeeseeeeeeceeeeeeeeeeeeeeaeeeeeeeeeeeeeeaeaaeneees 150 4 4 3 Rotate the Model WO Wwa desc ves lesccceecsneetatadstientabaveceCetcteee letersi ea tsti a laaeebt ble eta alr 150 4 4 4 Rotate the Model DoWnWald cccccccceceeeeeeeeeeneeeeeeeeeeeeeeeeaeeeeeeeeeeeeeeeneeaeeees 151 4 4 5 Reset the Model Rotations cc lt cese avcteseeeeevne apy eee etek ees eee arene eee eters 151 4 4 6 Enlarge the Model View aig etre leseste cd covey clig see dt peace aayetin diceea te ce tgudiy cata veialeea tee 152 4 4 7 Shrink the Model View sssssssssssssssssssssssssssssssssssssssssesssssssssseeeessenessses 152 4 4 8 Define Zooming RECTANGIC x 02 2 ccceeccscsnaees seeceeeetentneeeeeesgetet teaeeeeeneaeeoneetnteenenn oct 152 4 4 9 Reset the Model Size isiicssisiathathsthathietintintiintiiatinistathiatiatiatiatiatiatraads 152 4 4 10 Set the View Center cccccccccccccccccccccccceceeeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeessanatess 153
2. 2 cccessseeceeeeeseeeeeesesseeeeeeneeeneeeeeneneeens 159 5 1 1 Set the Acceleration Time History Input File for ACS SASSI EQUAKE Module 161 Copyright 2014 by Ghiocel Predictive Technologies Inc 3 ACS SASSI PREP User Manual 4 5 1 2 Set the Acceleration Time History Input File for ACS SASSI EQUAKE Module 162 5 1 3 Activate an Existing MOdel ccccccceeeeeseeeeeceeeeeeeeeeeenaaeeeeeeeeeeeeeeneeeeeeaeaaeees 162 5 1 4 Write the Analysis FICC aad ak ata a ae ae 162 5 1 5 Define Spectral Amplification Ratios for ACS SASSI HOUSE Module 163 5 1 6 Define Analysis Options for ACS SASSI ANALYS Module 163 5 1 7 Set Options for AFWRITE and CHECK cccccccceeeeeeeeeeeeenneeeeeeeeeeeeeeeeenneeeees 164 Ae E O AET Data acs i ctdedseed nthe else de et ed E E E diana tacyiied 164 5 1 9 Set Spectra Correlation Values for ACS SASSI EQUAKE Module 0 165 5 1 10 Add Reset Damping Ratios for RS AnalySis ccecceeeeeeceeeeeeeeeeeeestneeeeeeees 165 aaa Delete a Mode Nr nae nr en et ere et eon Cone Cn eon en ene 165 5 1 12 Define Data for Dynamic Soil PropertieS cccceeecceeeeeceeeeeeeeeeeeeeseenneeeeeeeees 165 5 1 13 Add Element Output Request for ACS SASSI STRESS Module 065 166 5 1 14 Define Spectra Title for ACS SASSI EQUAKE Module cceeeeeeeeeteeeeeees 166 5 1 15 Define Analysis Options for ACS SASSI EQUAKE Module
3. T SOIL Module CE aera A e2c2 7 6 6 1 Arrange Windows Side by Side Horizontal Select Tile Horizontally from the Window submenu Use this command to horizontally arrange multiple opened windows in a non overlapped fashion 6 6 2 Arrange Windows Side by Side Vertical Select Tile Vertically from the Window submenu Use this command to vertically arrange multiple opened windows in a non overlapped fashion 6 6 3 Arrange Windows Overlapped Select Cascade from the Window submenu Use this command to arrange multiple opened windows in an overlapped fashion 6 6 4 Arrange Minimized Windows Select Arrange Icons from the Window submenu Use this command to arrange the icons for minimized windows at the bottom of the main window If there is an open document window at the bottom of the main window then some or all of the icons may not be visible because they will be underneath this document window 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 80 ACS SASSI MAIN User Manual 81 6 6 5 Close the Active Window Select Close from the Window submenu Use this command to close the active window 6 6 6 Close All Active Windows Select Close All from the Window submenu Use this command to close all opened windows 6 7 VIEW SUBMENU ACS SASSI MAIN Torx Model File Run RunAll Options Window BAGY 4 v ToolBar sla S S B Ofte y eos v Status Panel v 1 e2
4. Text Color for Element and Group Numbers Select this button to change the color for displaying element and group numbers Text Color for Node Numbers Select this button to change the color for displaying node numbers Plot Colors x Symbol Color for Masses Ooo Symbol Color for Boundary Conditions a Cancel Text Color for Element and Group Numbers Help Text Color for Node Numbers ail Background Color Groups Materials Soil Layers Beam Prop Spring Prop Matrix Prop Background Color Select this button to change the color for the background Groups Select this page to change group colors Double click a list item to change the color of the corresponding group Materials Select this page to change material colors Double click a list item to change the color of the corresponding material Soil Layers Select this page to change soil layer colors Double click a list item to change the color of the corresponding soil layer Beam Prop Select this page to change beam property colors Double click a list item to change the color of the corresponding beam property Spring Prop Select this page to change spring property colors Double click a list item to change the 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 130 ACS SASSI PREP User Manual 131 color of the corresponding spring property Matrix Property Colors Select this page to change matrix property
5. cccceeeeeeeeeeeeeeeeeees 184 5 2 5 Set Interaction Interface Intermediate or Internal Nodes 184 5 2 6 List Interaction Interface Intermediate or Internal Nodes 185 5 2 7 Generate a Node List by Translation cccccceeeeeeeeeeeeeeeeeeenneeeeeeeeeeeeeeeeeneeeees 185 5 2 8 Define a Local Coordinate System with Euler Angles cceeeeeeeeeeeeeees 185 5 2 9 Define a Local Coordinate System with NOd S ccccceeeeeeeeeeeeeeeeeeeeeeeaeeaes 185 5 210 Denne a Node a a aa a aaa E raaa ariaa 186 5 211 B 2 SS oo tom ag ae ee a aT dy eee Teor re Tere er 186 5 2 12 Generate Nodes by Copying a Node Pattern eeeeeeeeeeeceeeeeeeeeeeeeeeeeneeeeeeees 187 5213 bist NOIGS ant ie epee eg eee ee eas eee ee 187 5 2 14 Define a Node with Average Coordinates cccccccceeeceeeeeeeeeeeeeeeeeeeeeeeeaaeaeeees 187 5 2 15 Modify a Defined NOUS aoe sah 8 atlas ie ee A ied tad Seed ak aes 187 5 2 16 Generate a Node List by Scaling eceeeecscccceeeeeeeeeeeeeeeeeeeeeeeeeeeeseaeaaeaneeees 187 5 2 17 Scale Nodal GoOrdinales iccsintetecessteusttintoigthiatanatteaccigteindeigthacciateenteiateacace ices 188 5 2 18 Delete Coordinate SySteMs ccccccccceceeeeeeeeecceeeeeeeeeeeeseeaeaeeeeeeeeeeeeeeeaeaeaaaaees 188 5 2 19 List Coordinate SYSICM Si aunt aie ale ai ea eee aces 188 5 3 ELEMENT INSTRUC TIONG civecieidriedeintet desis eed alate dine id laren nel ondit he 188 5 3 12 Delet
6. Version 3 0 K including pt ions A AA and FS Ad zj a An Pa Software for 3D Dynamic Analysis Including gt Soil Structure Interaction User Manuals Revision 1 ii p F Fo i z Ghiocel Predictive Technologies Inc 4 South Main St 3 Floor Pittsford NY 14534 USA Phone 585 641 0379 Fax 585 586 4672 E mail acs sassi ghiocel tech com _ An Aavanc S o C o it aA i a ri E DISCLAIMER GHIOCEL PREDICTIVE TECHNOLOGIES INC DOES NOT WARRANT THE OPERATION OF THE ACS SASSI VERSION 3 0 PROGRAM WILL BE UNINTERUPTED OR ERROR FREE GHIOCEL PREDICTIVE TECHNOLOGIES INC MAKES NO REPRESENTATIONS OR WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE Ghiocel Predictive Technologies Inc in any case shall not be liable for any costs damages fees or other liability nor for any direct indirect special incidental or consequential damages including loss of profits with respect to any claim by LICENSEE or any third party on account of or arising from this License Agreement or use the ACS SASSI Version 3 0 program The ACS SASSI Version 3 0 baseline code using the standard skyline solver has been extensively verified tested and used for seismic 3D soil structure interaction models up to 25 000 nodes including up to 5 000 interaction nodes However for 20 000 node or slightly larger size SSI p
7. 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 13 ACS SASSI MAIN User Manual 14 mistakenly fixed interaction nodes and respectively any potentially undesired hinge between SOLID SHELL and BEAM elements WARNING The use of the FIXEDINT and HINGED commands included in the SUBMODELER module to check the SSI model is suggested before any analysis is performed Please see ACS SASSI ANSYS Integration Capability User Manual for details on the SUBMODELER module and the FIXEDINT and HINGED commands 4 The excavated soil volume FE model is idealized by either standard 2D PLANE strain in 2D SSI analysis or 3D SOLID elements for 3D SSI analysis that are connected with the structure at the nodal points at the foundation soil interface if no near field soil is included If near field soil elements used to model back fill soil or irregular soil layering are included in the excavation volume then the connection node points are the nodes at the boundary between the near field soil finite element model and far field soil free field soil model 5 The SSI that is between the surrounding soil deposit and the structural FE model with or without near field soil elements occurs at the interaction nodes All the interaction nodes lie on the soil layer interfaces and have only translation degrees of freedom Rotational structural motions are transferred by the nodal translations 6 The SSI interaction nodes are defi
8. ceeeee 166 5 1 16 Define Analysis Options for ACS SASSI FORCE Module ccceeceeees 167 5 1 17 Add Delete Frequency Numbers to from Frequency Se t eeeeeeeeeees 167 5 1 18 Define Analysis Options for ACS SASSI HOUSE Module ceeeeeeees 167 5 1 19 Define Incoherence Analysis Options for ACS SASSI HOUSE Module 168 5 120 SWitch INPUIIO Filet oun au ee cua ate aie a EE a core al aici ae 169 Babe TeiGt PI GQUGMC Ys lS ecco efits canes E uae ae See ea 169 5 1 22 Define Input Motion Data for ACS SASSI HOUSE Module ceeeeeeeeeee 169 5 1 23 Change the Model ODTONS iii eves ciate ec kaptareversc Gereetacsaeraianedr eases etl aseeb eis 170 5 1 24 Define Analysis Options for ACS SASSI MOTION Module ccceeeeee 170 5 252 Create a New MOGeIs iiveiscdiuvanseatacnevousncase ins banynavesanesankiane Enui naa ev hoon aann ocean 171 5 1 26 Add Nodal Output Request for ACS SASSI MOTION Module 0668 171 5 1 27 Switch Output to File or SCre n cies ce uel seid ag eee ed eed 172 5 1 28 Define Analysis Options for ACS SASSI POINT Module cccccccceeeeees 172 5 1 29 Quit the ACS SASSI PREP Pre ProCessOfii isssisiecssvecncsestdesccescdeacdesestsnecciawks 172 5 1 30 Re Load the Active Models vsekicecanusacelanecdceciawedanerniged ceca sued sv exawedaneannedeueanueasdoane ges 173 5 1 31 Repeat the Last IMStruCueniis ssp te esl ice
9. lt dz gt generates a set of node lists by copying a node pattern where lt itim gt total number of sets of nodes to be generated not including the original pattern default value 1 lt step gt increment to be applied to node numbers If lt step gt is not specified it will be set to lt n2 gt lt n1 gt 1 lt n1 gt lt n2 gt lt inc gt pattern to be copied default values for nodes the last two nodes created default value for lt inc gt 1 lt dx gt lt dy gt lt dz gt increments to be applied to the X Y Z node coordinates default values 0 5 2 13 List Nodes NLIST lt n1 gt lt n2 gt lt ince gt lists the nodes between lt n1 gt default first node and lt n2 gt default last node with increment lt inc gt default 1 5 2 14 Define a Node with Average Coordinates NMED lt nd gt lt n1 gt lt n2 gt lt n3 gt lt n4 gt lt n8 gt defines node lt nd gt with the coordinates x y z as the average value of the coordinates of the nodes contained in the list lt n1 gt lt n2 gt lt n3 gt lt n4 gt lt n8 gt The node list must contain at least one node 5 2 15 Modify a Defined Node NMOD lt nd gt lt x gt lt y gt lt Z gt modifies nodal coordinates of node lt nd gt to lt x gt lt y gt lt z gt zero value for lt x gt lt y gt lt z gt will have no effect To set the corresponding coordinate to zero use a number smaller than 1 0E 20 or
10. Coherent Incoherent V Wave Passage Effects Included Print Amplitude Only FORCE ANALYS MOTION STRESS RELDISP AFWRITE Multiple Excitation C Use Multiple Excitation Input Motion Number 1 First Foundation Node 1 Last Foundation Node 69 X Coord of Control Point 0 Y Coord of Control Point 0 Z Coord of Control Point 0 Global Impedance Calculations No Impedance Calculations Only Decoupled Diagonal Impedances Full Rigid Body Impedance Matrix 6X6 Cancel The following options allow you to specify the analysis options for ACS SASSI ANALYS module Operation Mode Select the operation mode from Solution and Data Check Type of Analysis Select the type of analysis from Seismic and Foundation Vibration Mode of Analysis Select the mode of analysis from nitiation Mode 1 New Structure Mode 2 New Seismic Environment Mode3 and New Dynamic Loading Mode 4 Save Restart Files For the baseline code this option enables the saving FILE5 and FILE6 in order to be able to restart the ANALYS module in Mode 3 or Mode 4 later FILE5 is saved anyway 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 95 ACS SASSI PREP User Manual 96 FILE5 is useful for restarting in Mode 2 FILE5 and FILE6 are named modelname N4 and modelname N5 For the fast solver code the restart enables the saving of COOXxxx and COOTKxxx files for the New Enviro
11. S Model File Batch Plot Options Window view Help DS 8 O s FAE S Z A amp l afwr moo Bla 4 aai esea S fe e e E ee Layer Thickness Unit P Wave S Wave P Wave S Wave Weight Velocity Velocity Damping Damping Ratio Ratio 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 0 163 12600 6300 0 01 0 01 1 2 3 4 5 6 7 8 9 10 For Help press F1 3 4 6 Open a Spectrum Plot Window Select Spectrum from the Plot submenu Shortcuts Tool bar Keys F8 Use this command to open a Spectrum Plot window and then select the response spectrum files that you would like to plot on the same figure The selected response spectrum files can be in the same directory or in different directories You may change the drawing options using the following commands Options Window Settings see section 3 5 18 Options Colors see section 3 5 26 or Options Font see section 3 5 29 The Options Windows Settings for the Spectrum Plots can also provide special post processing capabilities of computed in structure response spectra for i spectral peak broadening ii enveloping of multiple spectra without or with bridging of spectral valleys and iii combination of three directional component spectra using either S
12. Sis 1 lole a a X z X I Output o active database DEFINE MODEL modeli Jinp e2c2 pre For Help press F1 NUM h Press Enter The ACS SASSI PREP module processes the input data You may choose to define the model data as described in the ACS SASSI PREP manual 5 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 54 ACS SASSI MAIN User Manual 55 9 Set the analysis options and write the analysis file see ACS SASSI PREP User s Guide 10 Close the ACS SASSI PREP Application and return to ACS SASSI MAIN The newly created model will be activated automatically 11 Run the desired modules from the Run submenu 12 View the result files using the File Open command 5 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 55 ACS SASSI MAIN User Manual 56 6 MENU COMMANDS ACS SASSI MAIN OF x Model File Run RunAll Options Window View Help Sle sj e ole ea BlHlaly s S eaa For Help press F1 I EQUAKE Module I SOIL Module I LIQUEF Module T SITE Module Ui The ACS SASSI MAIN menu has the following submenus Model File Run Open Database Opens or creates a model database Open Model Opens a model from a database Close Model Closes the active model 1 2 3 4 Opens specified model Exit Exits ACS SASSI MAIN Open Opens an existing file Print Setup Selects a printer and printer conn
13. defines the end release code for the BEAMS J node for the element set defined by lt e1 gt lt e2 gt default lt e1 gt and lt inc gt default 1 from the active group The active group must be of type BEAMS The six values lt k1 gt lt k6 gt correspond to the force components P1 P2 P3 M1 M2 M3 at the J node and may take the values 1 and 0 only If one of the element end forces is known to be zero hinge or roller the corresponding digit should be set to 1 5 3 20 Assign K Node to BEAMS Elements 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 196 ACS SASSI PREP User Manual 197 KMOD lt e1 gt lt e2 gt lt step gt lt nd gt assigns the BEAMS K node to lt nd gt for all elements between lt e1 gt and lt e2 gt default lt e1 gt with step lt step gt default 1 from the active group Note the active group must be of type BEAMS 5 3 21 Define a Soil Layer L lt nm gt lt thick gt lt weight gt lt pveloc gt lt sveloc gt lt pdamp gt lt sdamp gt defines the soil layer number lt nm gt with thickness lt thick gt specific weight lt weight gt P wave velocity lt pveloc gt S wave velocity lt sveloc gt P wave damping ratio lt pdamp gt and S wave damping ratio lt sdamp gt Note Soil layers may be assigned to excavated soil elements see MSET instruction section 5 3 30 or may be used to define soil layering or halfspace properties for th
14. lt DEP gt Flag for LIQ module that is not included It should always be 0 lt SITE gt Flag for SITE module lt POINT gt Flag for POINT module lt HOUSE gt Flag for HOUSE module lt FORCE gt Flag for FORCE module lt ANALYS gt Flag for ANALYS module lt COMBIN gt Flag for COMBIN module lt MOTION gt Flag for MOTION module lt STRESS gt Flag for STRESS module lt RELDISP gt Flag for RELDISP module Note This instruction is provided for input files To set the analysis options for the AFWRITE and CHECK instructions from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 14 5 1 8 Check Data CHECK 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 164 ACS SASSI PREP User Manual 165 checks all data for errors and warnings that can affect the analysis Check is automatically run before writing the analysis file AFWAITE instruction see section 5 1 4 but CHECK can be run explicitly for finding any errors even with a partial model The analysis parameters must be set before running check because this instruction simulates the writing of the analysis files After the check procedure is complete and if there are any errors or warnings they will be listed in the Check Errors window see section 3 7 1 5 1 9 Set Spectra Correlation Values for ACS SASSI EQUAKE Module CORR lt no gt lt time gt lt val gt sets the lt
15. sublayer number lt save gt save option 0 disabled 1 enabled lt outcrop gt outcrop option 0 disabled 1 enabled Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 41 Set the Spectral Amplification Factor Output Options for ACS SASSI SOIL Module SSAF lt layer gt lt save gt lt outcrop1 gt lt outcrop2 gt lt layer2 gt lt freqstep gt lt title gt defines the spectral amplification factor output options for ACS SASSI SOIL module lt layer gt sublayer number lt save gt save option 0 disabled 1 enabled lt outcrop1 gt outcrop option for first sublayer 0 disabled 1 enabled lt outcrop2 gt outcrop option for second sublayer 0 disabled 1 enabled lt layer2 gt number of second sublayer lt freqstep gt frequency step lt title gt title for spectral amplification factor output Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 177 ACS SASSI PREP User Manual 178 5 1 42 Set the Stresses and Strains Output Options for ACS SASSI SOIL Module SSTR lt layer gt lt opt1 gt lt opt2 gt
16. 2 Fast Flexible Volume Flexible FFV or 3 Flexible Interface FI that is equivalent to the Subtraction or Modified Extended Subtraction method depending on the interaction nodes selection 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 81 ACS SASSI PREP User Manual 82 EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Operation Mode Soil Motion r Multiple Excitation Solution Data Check C Coherent ir T Use Multiple Excitation Coherence Parameter X Dir Input Motion Number 1 r Dimension of Analysis 0 15 E First Foundation Node Coherence Parameter Z Dir 0 25 Last Foundation Node r Flexible Volume Method Soil Velocity Alpha fo X Coord of Control Point 0 Flexible Volume sea i Direct C Skin Number of Embed Layers i Y Coord of Control Point 0 Flexible Interface Time Step of Sesmic Motion 0 01 Z Coord of Control Point 0 ourier Components 2048 C Direct z Spectral Amplification Ratios Frequency Set Number TAA AAA Number of Incoh Modes Print Coherence Matrix j 0 Nonlinear SSI Input Data Wave Passage I Use Wave Passage Angle of Line D with X Axis lo foparert Velocty for Line D 0 Unlagged Coherency Model 0 N C 1D C 2D 3D Acceleration of Gravity 32 2 Motion Incoherency Simulation Superposition Mode Deteministic Median Incoherency Input Linear Stochastically Simulated Inco
17. G S Hardy K L Merz and J J Johnson 2007 Validation of CLASSI and SASSI to Treat Seismic Wave Incoherence in SSI Analysis of NPP Structures Electric Power Research Institute Palo Alto CA and US Department of Energy Germantown MD EPRI Report TR 1015110 November Tabatabaie Raissi M 1982 Flexible Volume Method for Dynamic Soil Structure Interaction Analysis Ph D Dissertation University of California Berkeley Tajirian F 1981 Impedance Matrices and Interpolation Techniques for 3 D Interaction Analysis by the Flexible Volume Method Ph D Dissertation University of California Berkeley Tseng and Lilhanand 1997 Soil Structure Interaction Analysis Incorporating Spatial Incoherence of Ground Motions Electric Power Research Institute Palo Alto CA Report No TR 102631 2225 US NRC ISG Report 2008 Seismic Issues Associated with High Frequency Ground Motion in Design Certification and Combined License Applications ISG 01 US Nuclear Regulatory Commission Washington DC May _http www nrc gov reading rm doc collections isg col app design cert html Vahdani S 1984 Impedance Matrices for Soil Structure Interaction Analysis by the Flexible Volume Method Ph D Dissertation University of California Berkely Wass G 1972 Earth Vibration Effects and Abatement for Military Facilities Analysis Method for Footing Vibrations Through Layered Media Technical Report S 71 1
18. SITE dialog box see section 3 5 6 Frequency Step Type the frequency step Hz The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Time Step of Control Motion Type the time step of control motion sec The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Nr of Fourier Components Type the number of values to be used in the Fourier transform The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Frequency Set Number Type the number of the frequency set The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 All forces and moments defined within the ACS SASSI PREP pre processor see F section 5 4 1 MM section 5 4 7 FREAD section 5 4 5 and MREAD section 5 4 12 instructions will be written to the input file for the ACS SASSI FORCE module Dynamic loads with similar time history but different maximum amplitude and arrival time may be applied at nodal points Reference time history is defined as having maximum reference amplitude and zero arrival time to which means the load starts acting on the nodal point at time zero All other time histories must be given relative to reference time history by defining load factor and arrival time The load factor is defined as the ratio between the maximum 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc
19. lt n2 gt and lt step gt The default values are the first node for lt n1 gt the last node for lt n2 gt and 1 for lt step gt If all codes lt c1 gt lt c4 gt are zero all interaction intermediate interface and internal nodes are listed 5 2 7 Generate a Node List by Translation LMOVE lt dx gt lt dy gt lt dz gt lt nd gt lt I1 gt lt l2 gt lt I3 gt lt l4 gt lt 115 gt defines new nodes beginning with lt nd gt lt nd 1 gt lt nd 2 gt according to the nodes belonging to the list lt l1 gt lt l2 gt lt I3 gt lt l4 gt lt I9 gt by translating them with lt dx gt lt dy gt lt dz gt The default values for lt dx gt lt dy gt lt dz gt are 0 The node list must contain at least one node 5 2 8 Define a Local Coordinate System with Euler Angles LOC lt ns gt lt type gt lt x0 gt lt y0 gt lt z0 gt lt txy gt lt tyZz gt lt txz gt defines the local coordinate system number lt ns gt using Euler angles with the type lt type gt having the origin coordinates lt x0 gt lt y0 gt lt z0 gt regarding to the general system and whose axes are rotated with the angles lt txy gt lt tyz gt lt txz gt the angles are in degrees lt type gt 0 Cartesian 1 cylindrical x is rotation axis 2 spherical x is rotation axis 3 pseudo spherical x is rotation axis 4 5 6 has the same meaning as lt type gt 1 2 3 but with y as rotation axis
20. shear strain curves e graphically by different colours associated with the elements in function of element groups properties materials e the Plot Info window can be activated by pressing the right mouse button in which case it will show all properties of the selected element Once the analysis model is generated the CHECK instruction see section 5 1 8 can be activated to verify data correctness and to show in the check window the error and or warning messages if any CHECK Errors amp Warnings x ERROR 46 No top layers Module SITE ERROR 12 Soil layer 0 is not defined Module SITE ERROR 44 Frequency set 0 is not defined Module SITE ERROR 51 All wave fields are deselected Module SITE ERROR 53 Illegal value for frequency 1 Module SITE ERROR 55 Illegal sum of wave ratios at frequency 1 Modu ERROR 55 Illegal sum of wave ratios at frequency 2 Modu ERROR 57 Illegal radius of central zone Module POINT ERROR 01 Illegal acceleration of gravity Module HOUSE v b CHECK is automatically activated when selecting the instruction for writing the analysis files AFWRITE see section 5 1 4 If errors are detected the affected analysis file s will not be written The maximum number of error and warning messages can be controlled by the Options Check menu command see section 3 5 2 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 17 ACS SASSI PREP User Manual 18
21. then the index refers to the matrix property table 5 3 41 Define a Spring Property SC lt nm gt lt SCX gt lt SCY gt lt SCZ gt lt SCXX gt lt SCYY gt lt SCZZ gt lt damp gt defines the spring property set number lt nm gt with the translational spring constants lt scx gt lt scy gt and lt scz gt and the rotational spring constants lt scxx gt lt scyy gt and lt sczz gt lt damp gt defines the damping ratio of the spring Note Spring constants are directly added to the global stiffness matrix Thus these constants must be given in the global xyz directions The spring constants in the six global directions are uncoupled 5 3 42 List Spring Properties SCLIST lt r1 gt lt r2 gt lt step gt lists the table of spring properties between lt r1 gt and lt r2 gt default last defined with step lt step gt default 1 5 3 43 Set Thickness for SHELL Elements THICK lt e1 gt lt e2 gt lt inc gt lt thick gt sets the element thickness to lt thick gt for the elements between lt e1 gt and lt e2 gt with step lt inc gt default 1 from the SHELL active group 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 203 ACS SASSI PREP User Manual 5 4 LOAD INSTRUCTIONS This instruction group was designed to define nodal masses forces and moments The instructions are the following Instruction Action F Defines a force FDEL Deletes forces
22. 2 N Operation1 Operation 1 Line 1 Number of Curves Operation Selection Save File Name Operation 1 Line 2 Variable for execution depends on operation selection Operation 1 Line s 3 Number of Curves rs files to be used Line s N M Operation 2 Operation Selection and Variable Line 0 Image Capture Ticks Y LogY TicksX LogX Graph Title 1 Broaden envelope Peak Bridge Broaden 2 SRSS Blank Line 3 Linear Combination Line 1 Scale Line 2 Scale Line 3 Scale 4 Average Blank Line 5 Export Table Blank Line Example Input 3 3 2 SRSS RS Blank Line 00001TR_X01 RS 00001TR_Y01 RS 00001TR_Z01 RS 3 3 Lin _Comb RS 10 4 0 4 00001TR_X01 RS 00001TR_Y01 RS 00001TR_Z01 RS 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 31 ACS SASSI PREP User Manual 32 1 1 Broaden_SRSS RS 015 SRSS RS This well perform 3 operations The first will be the SRSS of the three files listed Next is a linear combination of the the three files listed The final operation is the broadening of the SRSS computed in the first operation with no peak bridging and 15 broadening 3 3 2 Time History The batch Time History function will execute a batch file that will add or subtract a group of time histories defined by the user and store the results into new file The Time history batch allows the user to post process multiple file groups at once Batch
23. 7 8 9 has the same meaning as lt type gt 1 2 3 but with z as rotation axis See also LOCAL instruction section 5 2 9 for defining coordinate systems using nodes 5 2 9 Define a Local Coordinate System with Nodes LOCAL lt ns gt lt type gt lt n1 gt lt n2 gt lt n3 gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 185 ACS SASSI PREP User Manual 186 defines the local coordinate system number lt ns gt using nodes with the type lt type gt with the origin in lt ni gt and the local axis orientation X lt n1 gt lt n2 gt and lt n3 gt in the positive xOy quadrant The Z local axis orientation will result from the vectorial product lt ni gt lt n2 gt X lt ni gt lt n3 gt and Y local from X x Z lt type gt 0 Cartesian 1 cylindrical x is rotation axis 2 spherical x is rotation axis 3 pseudo spherical x is rotation axis 4 5 6 has the same meaning as lt type gt 1 2 3 but with y as rotation axis 7 8 9 has the same meaning as lt type gt 1 2 3 but with z as rotation axis See also LOC instruction section 5 2 8 for defining coordinate systems using Euler angles 5 2 10 Define a Node N lt nd gt lt x gt lt y gt lt z gt lt pile gt lt control node gt defines node lt nd gt with coordinates lt x gt lt y gt lt z gt in the active coordinate system global or local lt pile gt attaches a pile to the node that has been defined by
24. INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 18 ACS SASSI MAIN User Manual 19 frequencies may be needed The use of 40 to 80 frequencies for simple stick structural models that captures only major global modes of vibration and 100 to 250 frequencies for complex flexible structural models that include many local modes vibrating with low damping is suggested For incoherent SSI analysis we suggest the use of a larger number of frequencies say in the 200 500 range Short et al 2007 Ghiocel 2013b Additional details on the SSI frequencies selection is provided in Section 4 1 2 1 5 6 System of Parameter Units For SSI analysis any system of units may be chosen to be used as long as these units of the input data are consistent in all the program modules Acceleration of gravity can be either 32 2 ft sec for the British Unit BU system or 9 81m s for the International Unit IU system 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 19 ACS SASSI MAIN User Manual 20 2 THEORETICAL BASIS In this section some basic assumptions and SSI procedures are reviewed 2 1 FLEXIBLE VOLUME AND INTERFACE METHODS In the FV substructuring approach the dynamic solution is computed for the coupled structure excavated soil system defined by the differential complex dynamic stiffness obtained by subtracting the excavated soil from the basement The difference between the dynamic complex
25. TFU TFI Impedance Plot Window SettingS ccccceeeeeseeteeees 124 3 5 19 Soil Property Plot Window SettingS ccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaneeeeeees 126 3 5 20 Interactive 3d Plot WindOWS SOMING lt 0 sccssee yicteas eiceeies eit acecvesteen ea ies 127 3 5 21 Set Colors Tor the Active WINDOW vcscesisecscoe cenlate iveisetdes agetiealeie tai tkelavedieats 129 3 5 22 Output VWWINGOW XZOlOIS skn arekin inaaianei aeaaea kanian itai aes 129 3 5 23 Model Plot Window Colors ccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeceeeeeeeeeeeeeeeeeeeeeeees 129 3 5 24 Time History Plot C Ol OIG a iccsse ages vee ce esis a ecu ery te eee eee ee ee oe eg ees 131 3 0 25 90l Layer PIGUGOIONS sarc cores vacated alc te a AEAEE AAAA EEEE EENAA pce dads bands EEIE ESAn EES 131 3 5 26 Spectrum TFU TFI Impedance Plot Colors ceeeeeeeeeeceeeeeeeeeeeeeeeenneeeeees 132 3 027 Soil Property Plot GOONS iat ates se teen etait eee eeeniaeeeen eee eet tance 133 3 5 28 Change the 3d Interactive Window Colo cccccceeeeeeeeeeeneeeeeeeeeeeeeeeeeneeeees 133 3 5 29 Change the Font of the Active WiINdOW cccceeeeeeeeeeeeneeeeeeeeeeeeeeeeeneeeeeeeeees 134 3 5 30 Change the Selection for the Active Model Plot Window ceeeeeeeeeeeees 134 3 5 31 Reset the Selection for the Active Model Plot WindOwW cccceeeeeeeeeeees 136 310 WINDOW SUBMENU coercive wsateveuwnasseay alata
26. The ACS SASSI SITE module has two basic operation modes e Form and solve transmitting boundary eigenvalue problem Mode1 FILE2 e Solve the site response problem Mode 2 FILE1 Mode 1 The ACS SASSI SITE module reads the soil layer properties and for each specified frequency forms the transmitting boundary submatrices for Rayleigh and Love wave cases Then it solves the two eigenvalue problems as described in the Theoretical Manual from which the eigenvalues and eigenvectors of the soil layering are obtained The results are then written to FILE2 The halfspace condition is also simulated at this stage ACS SASSI SITE automatically generates a specified set of sublayers whose thickness vary with frequency attached to viscous dashpots at the base The generated sublayers and dashpots are then added to the fixed top layers FILE2 provides the information needed to run ACS SASSI SITE in Mode 2 as well as to compute the transmitting boundary by ACS SASSI POINT Since the eigenvalue problems to be solved for an arbitrary three dimensional horizontally layered site are the same as those to be solved for a plain strain model the information from FILE2 can be used for both two and three dimensional cases as well Mode 2 The ACS SASSI SITE module recovers the soil layer properties and the eigen solutions for Rayleigh and Love wave cases from FILE2 Then according to the existence of each wave type ACS SASSI SITE computes the mode shapes and wave
27. Toronto August Ghiocel D M 2004 Stochastic Simulation in Engineering Predictions Chapter 20 the CRC Press Handbook on Engineering Design Reliability Eds Nikolaidis Ghiocel and Singhal CRC Press December Ghiocel D M and Wang L 2004 Seismic Motion Incoherency Effects on Structures Proceedings 3 UJNR Workshop on Soil Structure Interaction March 29 30 2004 Menlo Park California March 30 31 Ghiocel D M and Ghanem R 2002 Stochastic Finite Element Analysis of Seismic Soil Structure Interaction ASCE Journal of Engineering Mechanics Vol 128 No 1 January Ghiocel D M 1998 Uncertainties of Seismic Soil Structure Interaction Analysis Significance Modeling and Examples Proceedings of the US Japan SSI Workshop USGS Menlo Park California September 22 23 Ghiocel D M et al 1996a Seismic Motion Incoherency Effects on Dynamic Response 7th ASCE Speciality Conference on Probabilistic Mechanics and Structural Reliability Worcester Ghiocel D M et al 1996b On Soil Structure Interaction SSI Issues for Deep Foundation Structures 6 Symposium on NPP Structures Equipment and Piping Raleigh North Carolina December 8 References Copyright 2014 by Ghiocel Predictive Technologies Inc 86 ACS SASSI MAIN User Manual 87 24 25 26 27 28 29 30 31 32 33 34 35 36 Ghiocel D M et al 1996c Seismic Mo
28. e x specified by LI JK where LI and JK are midpoints of sides L I and J K e z normal to x and to the line adjoining midpoints IJ and KL e y normal to x and z to complete the right handed system used to compute the resultant forces 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 191 ACS SASSI PREP User Manual 192 Figure 5 3 Node numbering and loval coordinate system for SHELL PLANE or LOVEWAVE elements Node K from the BEAMS elements is a geometry reference point which is used to define the local axes 1 2 3 of the beam element Node K which may be any other nodal point in the system must not lie on the local axis 1 Figure 5 4 Local coordinate system for BEAMS elements 5 3 6 Compress Elements ECOMPR compresses elements from the active group removes the element numbering gaps 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 192 ACS SASSI PREP User Manual 193 5 3 7 Delete Elements EDEL lt e1 gt lt e2 gt lt inc gt deletes elements between lt e1 gt and lt e2 gt with step lt inc gt The default values are lt e1 gt for lt e2 gt and 1 for lt inc gt 5 3 8 Generate Elements by Translation EGEN lt itim gt lt ninc1 gt lt e1 gt lt e2 gt lt inc gt lt ee gt generates elements by copying a pattern of elements where lt itim gt total number of element sets to be generated
29. fixed format input files to ACS SASSI and also from ACS SASSI to ANSYS APDL input file format ACS SASSI uses an automatic management of all data resources files directories and interconnections between different software modules ACS SASSI can be run interactively for a single SSI model or batch for single and multiple SSI models In ACS SASSI Version 3 0 the size of the SSI problems that can be solved are finite element FE models with 100 000 nodes The ACS SASSI Version 3 0 has two solution implementations with very different computational speeds These two solvers are i the standard solver and ii the newer parallel fast solver The fast solver FS is tens to hundreds of times faster than the standard solver also used by the university SASSI2000 code The standard solver code was tested for complex 3D SSI models with sizes up to 25 000 nodes and up to 5 000 interaction nodes on 16 GB RAM workstations The fast solver that is much faster was tested for much larger size 3D SSI models with up to 100 000 nodes and 35 000 interaction nodes on 192 GB RAM workstations running under MS Windows 7 or 8 The ACS SASSI Version 3 0 fast solver is about 2 3 times faster than the previous ACS SASSI Version 2 3 0 fast solver The fast solver does not need any SSI restart analysis for the three directional seismic input components since it solves the X Y and Z input cases in memory without the need of writing and reading the large restart file
30. lt m2 gt default value lt m1 gt with step lt inc gt default 1 5 3 3 Delete Real Properties DELR lt r1 gt lt r2 gt lt inc gt deletes the real properties with index from lt r1 gt to lt r2 gt default value lt r1 gt with step lt inc gt default 1 5 3 4 Delete Spring Properties DELSC lt r1 gt lt r2 gt lt inc gt deletes the spring properties with index from lt ri gt to lt r2 gt default value lt ri gt with step lt inc gt default 1 5 3 5 Define an Element E lt ne gt lt n1 gt lt n2 gt lt n amp gt defines the element number lt ne gt and element nodes lt n1 gt lt n2 gt lt n8 gt the total node number changes from one group type to another An element group must be active element numbers start with 1 for each element group 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 190 ACS SASSI PREP User Manual 191 Prisms and pyramids may be obtained by repeating node numbers IFS Figure 5 1 Node Numbering for SOLID elements For SHELL PLANE or LOVEWAVE triangular elements LOVEWAVE elements not included in this version do not define node L see GROUP instruction section 5 3 16 WA Figure 5 2 Node Numbering for 2D elements The nodes I J K L must be in sequence in a counter clockwise direction around the element Local coordinates in a four node SHELL PLANE or LOVEWAVE element are shown below
31. time step and number of points to be used in the Fourier transform of the time history respectively For 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 45 ACS SASSI MAIN User Manual 46 single harmonic forced vibration analysis the time history input is not required therefore the user can directly specify DF Once the frequency step is defined the number of frequency points fi are determined through the use of integer frequency numbers NFREQi defined as follows NFREQ f DF i 1 2 NF where NF is the total number of frequency points selected for the analysis according to item 6 of this section The maximum frequency number to be specified is controlled by the cut off frequency and can be obtained as follows NFREQ fy DF where fnris the cut off frequency 12 Soil Deposit Modeling The foundation soil is defined by semi infinite elastic viscoelastic layers resting on a rigid base rock or semi infinite elastic viscoelastic halfspace The allowable layer thickness for the SSI analysis is determined using the simple rule that the layer thickness must not exceed one fifth of the wave length at the highest frequency of analysis Based on this rule the soil profile is selected by subdividing the soil layer into a number of sublayers WARNING For deep soft soil deposits having non uniform variations with depth a large number of soil layers could be required to transmit a suffi
32. z 5 2 16 Generate a Node List by Scaling 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 187 ACS SASSI PREP User Manual 188 NMOVE lt dx gt lt dy gt lt dz gt lt nd gt lt I1 gt lt l2 gt lt I3 gt lt l4 gt lt I15 gt defines new nodes beginning with lt nd gt lt nd 1 gt lt nd 2 gt according to the nodes belonging to the list lt l1 gt lt 12 gt lt I8 gt lt l4 gt lt I9 gt by scaling them with lt dx gt lt dy gt lt dz gt The default values for lt dx gt lt dy gt lt dz gt are 1 The node list must contain at least one node 5 2 17 Scale Nodal Coordinates NSCALE lt n1 gt lt n2 gt lt inc gt lt stx gt lt sfy gt lt sfz gt scales the coordinates of the nodes between lt n1 gt and lt n2 gt with step lt inc gt default 1 by the scaling factors lt sfx gt lt sfy gt lt sfz gt if one of the scaling factors is 0 0 it will be set to 1 0 5 2 18 Delete Coordinate Systems SDEL lt s1 gt lt s2 gt lt inc gt deletes the coordinate systems from lt s1 gt to lt s2 gt default value lt s1 gt with step lt inc gt default 1 5 2 19 List Coordinate Systems SLIST lt s1 gt lt s2 gt lt inc gt lists the coordinate systems from lt s1 gt default first system to lt s2 gt default last system gt with step lt inc gt default 1 5 3 ELEMENT INSTRUCTIONS This instructi
33. 15 4 4 5 Reset the Model Rotation Select from the Plot tool bar Shortcut Keys Ctrl A Click this button to reset the rotations performed by clicking the rotation buttons 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 151 ACS SASSI PREP User Manual 152 4 4 6 Enlarge the Model View Select from the Plot tool bar Shortcut Keys Ctrl numeric keypad Click this button to enlarge the model s view in the active Model Plot window by a factor defined by the Options Window Settings command see section 3 5 15 To reset the view s size click the Zoom Out or Reset Zoom button see sections 4 4 7 and 4 4 9 4 4 7 Shrink the Model View Select from the Plot tool bar Shortcut Keys Ctrl numeric keypad Click this button to reduce the model s view in the active Model Plot window by a factor defined by the Options Window Settings command see section 3 5 15 To reset the view s size click the Zoom In or Reset Zoom button see sections 4 4 6 and 4 4 9 4 4 8 Define Zooming Rectangle Select from the Plot tool bar Shortcut Keys Ctrl 7 numeric keypad Click this button to define a zooming rectangle Click the upper left corner of the zooming rectangle and drag the mouse cursor to the lower left corner while holding the left mouse button down The view from the defined rectangle will fill the active window This button remains pressed unti
34. 2 GETTING STARTED This section shows how to define data for a simple model The data may be entered in any order Some steps may be omitted for some models and some models may require additional data Hence this section is intended to be a guideline for the users who are not familiar with ACS SASSI PREP 1 Define a model using the Model New command see section 3 1 1 Model Name OK Model Path C ACS_C RBYY Help Cancel Model Title Database C ACS_C RB RB sdb gt 2 Define the nodes for the structure starting from the bottom See the N instruction section 5 2 10 3 Set the boundary conditions using the D instruction see section 5 2 2 4 Define the groups and elements using the GROUP and E instructions see sections 5 3 16 and 5 3 5 5 Check the elements by opening a Model Plot window by using the Plot Model command see section 3 4 1 6 Define the materials soil layers and beam properties using the M L and R instructions see sections 5 3 23 5 3 21 and 5 3 37 2 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 18 ACS SASSI PREP User Manual 19 10 11 12 13 Model File Batch Plot Options Window View Help B 28 e elos xal lela Z S FREQ1140160 180210 gt AFwRte 8 Alee IALYS 0 0 0 0 1 1 0 0 0 10 1 OTION 0 0 1 10 0 0 1 100 100 0 0 1 0 0 0 0 0 0 0 0 DAMP 0 02 ITHTIT EL CENTRO ACCELEROGRA
35. 2014 by Ghiocel Predictive Technologies Inc 66 ACS SASSI PREP User Manual 67 Iteration Parameters Save Strain Compatible Soil Properties Save print iterated strain soil properties Number of Iterations Select number of iterations Soil Profile Layer Number Select each layer number All layer properties have to defined All following options apply to this layer SOIL accepts up to 200 soil layers Property Number Type the soil layer property number for the active layer see MAIN manual The soil property can be defined with up to 100 soil curves Dynamic Soil Property Select the dynamic soil property for the active layer Accelerations Select acceleration output options for the active layer 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 67 ACS SASSI PREP User Manual 68 Analysis Options Input Motion Nr of Fourier Components 4096 Time Step of Input Motion 0 005 Number of Values poo Multiplication Factor fo Max Value for Time History 07 Gravity Accel ft s2 or m s2 322 used for freefied analysis fo Number of Header Lines Cutoff Frequency Hz fo f Control Point Layer File D ssi Demo 1 RG160X ace gt IV Save Strain Compatible Soil Properties Number of Iterations je Equiv Uniform Max Strain jos Response Spectrum Soil Profile Layer Number Property Number z Accelerations No Computation Compute Maximum Co
36. 2014 standard and the USNRC SRP 3 7 2 require a preliminary validation study if any other method than FV is used such as SM MSM or FFV The validation against FV has to be done before SM MSM or FFV can be used for the SSI production runs As recommended in the ASCE 04 2014 standard the validation analysis can be done for simple excavated soil models including no structure or foundation part The validation study shall compare the computed acceleration transfer functions ATF at the common nodes between the structure and excavated soil Rather than considering the solely excavated soil model the swimming pool model the use of a simplified massless foundation model to determine the kinematic SSI effects using SM MSM or FFV against FV is suggested For deeply embedded SSI models such as SMRs 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 47 ACS SASSI MAIN User Manual 48 in deep soft soil deposits the excavation soil model could become numerically poorly conditioned and therefore should be avoided The most complete validation study is be to consider the full SSI model and check ATF at critical locations within the nuclear building Ghiocel et al 2013a WARNING The Skin Method is not recommended for nuclear applications and it was not V amp V ed under company QA program Its implementation is only for research and benchmark purposes not for design related projects The FV
37. 4 4211 Reset ihe View Gemetirnccisccnoccistasnasiiasnasilagnds plerocdiplerecdiplerocdiplea sah chien iai 153 4 4 12 Switch Hidden Lines On OM ivecciccins cceceees cece duties tile iutice tile Cevicstils Carew nananana 153 4 4 13 Switch Element Shrink On Office reccesesvescenmnngcsngevagtsumnngenguregesenrngesnmennscuae 154 4 4 14 Color Elements by Groups occ cceceseseiteninccecicceteetaeitanatecar ciebapubaeetedataueteniiariietineds 154 4 4 15 Color Elements by Materials Soil LayersS ceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeeeees 154 4 4 16 Color Elements by Beam Spring Properties ccccceceeeeeeeeeeeeeeeeeeeeeeneeees 154 4 4 t7 Display Node NUM DOS ice aa a aa aa ra aaraa a ines trentwey aAa 155 4 4 18 Display Element NUMDGIs s s ous cai cievecesoacecedscnevecagicngvaceshovestsaavecaiecsctiaen Sete 155 4 4 19 Display Group NUMDEIG 2 cccceeeeeeee cette eeeeeeeeeeeeeeeeeeeeeeeaaeeeeeeeeeeeeeeeeeeeeeees 155 4 4 20 Display Symbols for Boundary Conditions ccccceeeeeeeeeeeeeeeeeeeeeeteteeeeeeeeees 156 4 4 21 Display Symbols for MasSes cccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeceaeeeeeeeeeeeeeeeeeeees 156 4 4 22 Show Masses in Selected Node ceeeceeeeeccceeeeeeeeeeeeeeeeeeeeeeeeeeeaeaaeneeeeeeees 158 4 4 23 Lock Unlock FECKAW fece eles vaccicceveucvccteuscccveucecteadccceuecteeunveis dite 158 Sc INSTRUCTION ES a E E EA EN E N 159 5 1 GENERAL COMMAND INSTRUCTIONS
38. ACC 5 2 RS_Average RS 00001TR_X_Sample_1 RS 00001TR_X_Sample_2 RS 00001TR_X_Sample_3 RS 00001TR_X_Sample_4 RS 00001TR_X_Sample_5 RS This input contains three operations The first combines the listed RS files using SRSS The second combines the listed acceleration time histories using addition The last operation averages the five RS files listed 3 3 6 AFWRITE Generation The AFWRITE Generation button is for creating multiple SSI batch run files This new functionality allows the user to split the current frequency set for the SSI analysis in multiple frequency subsets This new functionality creates batch inputs for SSI analysis based on the frequency set splitting Once the user selects the AFWRITE Generation option a window menu will pop up and ask the user for the location of ACS SASSI batch modules on the hard drive as shown in the figure below The user can then select the number of partitions the number of frequency subsets that will be used and use the AFWRITE button When the user select AFWRITE the current frequency set will be divided equally and a separate batch file will be written for each partition in a SetX X is the set number folder The AFWRITE will be executed three times for each folder The AFWRITE options are varied slightly to set up the SSI inputs for the X Y and Z direction ground motion components 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 35 ACS SASSI PREP Use
39. Activates specified window Offers you an index to topics on which you can get help Displays the version number of this application 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 22 ACS SASSI PREP User Manual 23 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 23 ACS SASSI PREP User Manual 24 r ACS SASSI Prep File Batch Plot Options Window View Help New Ctl N REL x amp l Open Ctrl O Input Output Convert to ANSYS Ce Iter es GTStrudl 1 Da ssi demol sdb demo1X 2 C WGI MHI _PSB psb sdb psb 3 Da ssi uhsna3 sdb uhsna3 4 D ssi MHI_TB TB sdb TBXFB Exit LE SSI MODEL OF A REACTOR BUILDING STRUCTURE W O EMBEDMENT 3 1 MODEL SUBMENU 3 1 1 Create a New Model Select New from the Model submenu Shortcuts Tool bar Keys Ctrl N Use this command to create a new model The model remains active until you select another one Models may be opened by selecting the Model Open see section 3 1 2 or Model 1 2 3 4 see section 3 1 5 commands The following options allow you to specify the options for the new model Model Name Type the model name All of the model s files will begin with this name long file names are allowed 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 24 ACS SASSI P
40. Batch Plot Options Window Yiew Help ple alsa fool z ZI xport Image Aleat aa Paise A ELE m m LME Sele 3 Output No active database 3 2 1 Open a File for Editing Select Open from the File submenu Shortcuts Tool bar Keys F4 Use this command to open a file for editing Change the active font by selecting Options Font see section 3 5 29 command Use the View menu to switch among the multiple open windows see View 1 2 command section 3 7 6 3 2 2 Export Window Image to Bitmap Select Export Image from the File submenu Shortcuts None Use this command to export active window to a bitmap image 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 28 ACS SASSI PREP User Manual 29 3 2 3 Export Time History Graph to Table Select Export Graph from the File submenu Shortcuts None Use this command to save all of the time history files on one plot to a tab separated table format that is readable by most spreadsheet programs 3 2 4 Select Printer Select Print Setup from the File submenu Use this command to select a printer and a printer connection This command presents a Print Setup dialog box where you specify the printer and its connection Printer Select the printer you want to use Choose the Default Printer or choose the Specific Printer option and select one of the current installed printers shown in the box You install printers and con
41. FLIST Lists forces FMOD Modifies a force FREAD Reads forces from file FSCALE Scales forces MM Defines a moment MMDEL Deletes moments MMLIST Lists moments MMOD Modifies a moment MR Defines a rotational mass MREAD Reads moments from file MRGEN Generates rotational masses by translation MRDEL Deletes rotational masses MRMOD Modifies a rotational mass MRSCALE Scales rotational masses MSCALE Scales moments MT Defines a translational mass MTDEL Deletes translational masses MTGEN Generates translational masses by translation MTLIST Lists translational and rotational masses MTMOD Modifies a translational mass MTSCALE Scales translational masses MUNITS Sets units for translational and rotational masses 5 4 1 Define a Force F lt n gt lt fx gt lt fy gt lt fz gt lt tx gt lt ty gt lt tz gt defines the force with force factors lt fx gt lt fy gt lt fz gt and force arrival times lt tx gt lt ty gt lt tz gt in node lt n gt Description section 5 4 1 section 5 4 2 section 5 4 3 section 5 4 4 section 5 4 5 section 5 4 6 section 5 4 7 section 5 4 8 section 5 4 9 section 5 4 10 section 5 4 11 section 5 4 12 section 5 4 13 section 5 4 14 section 5 4 15 section 5 4 16 section 5 4 17 section 5 4 18 section 5 4 19 section 5 4 20 section 5 4 21 section 5 4 22 section 5 4 23 section 5 4 24 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Tech
42. File c ccccceceeeeeseeeeeeceeeeeeeeeeeeeeeeeeeeaeaaeaees 179 5 1 47 Set the Title for Acceleration Time HiStory cc eeeeeceeeeeeeeeeeeeeeeeeeaeeaeeeeees 179 5 1 48 Set the Model Tithewt aks ashe at Ast oet en th CN did tata he eee eect tate arecraclt 180 5 1 49 Add Delete Top Layers for ACS SASSI SITE Module eeeeeeeeeteeeeees 180 5 1 50 Define Wave Information for ACS SASSI SITE Module cccceeeeeeeereeeees 180 5 1 51 Define Wave Passage Data for ACS SASSI HOUSE Module ee 181 5 1 52 Write Model Data to an Input File eee ce ceeeeeeeee eect eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 181 5 1 53 Relative Displacement Options cccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneneees 181 5 1 54 Relative Displacement Reference File ccccceesecssecceeeeeeeeeeeeeeeaeeeeeeeaeaaees 182 5 1 55 Add a node to the Relative Displacement Output List cesses 182 5 2 NODE INSTRUC TIONS hus ch tasustacinetaaiidae ant igviedanioeenaeie naa 182 5 2 1 Activate a Coordinate SYSIG IMac ctccctciccetetieatel ate eaniieladlieN sala Nitem alae te 183 5 2 2 Set BOUNGary CONGITIONS cect necailailecs odoin cnedehaadachenaseceaeeencedlislace a ee estersaelGeiave 183 5 2 3 Generate aVINO 6 LING sorta rcca entered rertbte aede raheny Stead cere cuba revcen he eeuutacintereteaee 184 5 2 4 Transform Nodes into the Global Coordinate System
43. File6 n5 and n6 extension is taken by the COOXxxx and COOTKxxx files The triple xxx is the frequency order number in the SSI frequency set that is active Mode 4 New Dynamic Loading If the problem is to be analyzed for a new set of external forces then the program module ANALYS can be restarted for New Dynamic Load Mode 4 This mode is similar to Mode 3 except that it is used for foundation vibration rather than seismic problems Only the restart files and the new FILE9 are needed for this restart analysis The results are also saved in the new FILE8 Not applicable to the fast solver code NOTE A special restart analysis is related to changes in the seismic load vector as described at page 38 in MAIN manual and page 53 in PREP manual 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 94 ACS SASSI PREP User Manual 95 EQUAKE SOIL SITE Operation Mode Data Check Type of Analysis Seismic Foundation Vibration Mode Of Analysis Initiation New Structure New Seismic Environment New Dynamic Loading Simultaneous Cases 0 v Save Restart Files POINT HOUSE Frequency Numbers V Take Frequency Numbers from File1 File9 Frequencey Set Number 1 Control Motion Foundation Refernce Point X Coodinate of Control Point 0 Y Coodinate of Control Point 0 Z Coodinate of Control Point 10 Coodinate Transformation Angle 0
44. M et al 1983c Structural Reliability Analysis of Nuclear Power Plant Subjected to Seismic Load using Advanced Numerical Methods National Symposium on Cybernetic Applications in Industry Bucharest June Hardin B O and Drnevich V P 1972 Shear Modulus and Damping in Soils Design Equations and Curves Journal of the Soil Mechanics and Foundations Division ASCE Vol 98 No SM7 667 692 Johnson J J Short S A and Hardy G S 2007 Modeling Seismic Incoherence Effects on NPP Structures Unifying CLASSI and SASSI Approaches Paper K05 5 SMiIRT 19 Toronto Canada August 12 17 2007 Luco J E and A Mita 1987 Response of Circular Foundation to Spatially Random Ground Motion Journal of Engineering Mechanics American Society of Civil Engineers Vol 113 No 1 January 1987 pp 1 15 Luco J E and H L Wong 1986 Response of a Rigid Foundation Subjected to a Spatially Random Ground Motion Earthquake Engineering and Structural Dynamics Vol 14 pp 891 908 Lysmer J and Kuhlemeyer R L 1969 Finite Dynamic Model for Infinite Media Journal of Engineering Mechanics Division ASCE Vol 95 No EM4 859 877 Lysmer J Udaka T Tsai C F and Seed H B 1975 FLUSH A Computer Program for Approximate 3 D Analysis of Soil Structure Interaction Problems Report No ERC 75 30 Earthquake Engineering Research Center UCB November Lysmer J 1978 Analytical Procedur
45. Property lt p gt Is Illegal 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 216 ACS SASSI PREP User Manual 217 e The spring constant xx from spring property lt p gt has a negative value e Correct spring constant xx from the specified spring property instruction MODSC see section 5 3 29 Error 38 Spring Constant YY from Spring Property lt p gt Is Illegal e The spring constant yy from spring property lt p gt has a negative value e Correct spring constant yy from the specified spring property instruction MODSC see section 5 3 29 Error 39 Spring Constant ZZ from Spring Property lt p gt Is Illegal e The spring constant zz from spring property lt p gt has a negative value e Correct spring constant zz from the specified spring property instruction MODSC see section 5 3 29 Error 40 Mass out of Defined Nodes Range e Check found masses that exceed the defined nodes range e Define more nodes or delete the masses instructions MTDEL and MRDEL see sections 5 4 19 and 5 4 14 Error 41 Node lt n gt Is Not Defined Group lt g gt Element lt e gt e Element lt e gt from group lt g gt uses node lt n gt which is not defined e Check the element for node errors or define node lt n gt instruction N see section 5 2 10 Error 42 No Nodes Defined e Your model has no nodes e This is a fatal error Check has stopped after this message You cannot check a mod
46. Set the Analysis Options for the ACS SASSI MOdules ssssssesesseeeeeeeeees 62 3 5 4 Set the Analysis Options for the ACS SASSI EQUAKE Module cceee 63 3 5 5 Set the Analysis Options for the ACS SASSI SOIL Module ccceceeeeeees 66 3 5 6 Set the Analysis Options for the ACS SASSI SITE Module ccccceceeeeees 69 3 5 7 Set the Analysis Options for the ACS SASSI POINT Module cccceeeees 74 3 5 8 Set the Analysis Options for the ACS SASSI HOUSE Module sssseeeeees 78 3 5 9 Set the Analysis Options for the ACS SASSI FORCE Module cceee 92 3 5 10 Set the Analysis Options for the ACS SASSI ANALYS Module c 00 93 3 5 11 Set the Analysis Options for the ACS SASSI MOTION Module 008 99 3 5 12 Set the Analysis Options for the ACS SASSI STRESS Module 00 107 3 5 13 Set the Options for the Relative Displacement RELDISP Module 117 3 5 14 Set the Options for the AFWRITE and CHECK Instructions ccceeeeeee 120 3 5 15 Set the Options for the Active WindOW ceceseeeeeneeeeeeeeeeeeeeeeneeeeeeeeeeeteeenes 120 3 5 16 Time History Plot Window SettingS cceeeeeececceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeaaes 122 3 5 17 Soil Layer Plot Window SGTINGS sxc fst sees cctcicct atest nel ieehiaaeitak ttetereeeeeeeieebetatecs 123 3 5 18 Spectrum
47. Sl 4 F 21915 caa EE Ne me e 2 Type BEAMS 145 46 I release code 000000 For Help press F1 3 7 3 Show Hide the Tool Bars Select Tool Bars from the View submenu Use this command to display or hide the tool bars which includes buttons for some of the most common commands in ACS SASSI PREP Select the tool bars you wish to display on the main window of ACS SASSI PREP You can move the tool bars from one side to another or you may drag them over the main window to display them as tool boxes I Mair OK Cancel i IV Instruction History IV Instruction List V Plot Help 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 140 ACS SASSI PREP User Manual 141 For a description of the ACS SASSI PREP tool bars see e Main tool bar see section 4 1 e Instruction History tool bar see section 4 2 e Instruction List tool bar see section 4 3 e Plot tool bar see section 4 4 3 7 4 Show Hide the Status Bar Select Status Bar from the View submenu Use this command to display and hide the Status Bar which describes the action to be executed by the selected menu item or depressed tool bar button and keyboard latch state A check mark appears next to the menu item when the status bar is displayed The left area of the status bar describes actions of menu items as you use the arrow keys to navigate through menus This area similarly shows messages that describe th
48. Step Accel Convert Time History to Response Spectrum Post Processing Options I Save TF in all points Restart for TF Select Extemal Files I Save ACC in all points I Restart for ACC Input Time History Files J7 Save RS in all points Restart for RS J Save Rotation for ANSYS V11 0 The following options allow you to specify the analysis options for ACS SASSI MOTION module Operation Mode Select the operation mode from Solution and Data Check 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 100 ACS SASSI PREP User Manual 101 Type of Analysis Select the type of analysis from Seismic and Foundation Vibration This option is the same as Set in the Analysis Options ANALYS dialog box see section 3 5 10 Baseline Correction The baseline correction is based on the Hudson Housner time domain correction procedure 1964 applied to a variety of seismic ground motions If baseline correction is selected then all the computed accelerations in acc files will be baseline corrected User can optionally save the nodal absolute acceleration velocity and displacement histories in FILE13 For full post processing of large size models the FILE13 size can become extremely large WARNING For computing relative displacements we recommend the use of the RELDISP module instead of the baseline correction option RELDISP uses a refined analytical approach to compute the relative displacement histo
49. Time History File Format The Batch time history file format starts with a single integer number which is the number of operations to be preformed by the file After the number of operations is defined the program will attempt to read an operation blocks The operation block consist of a header line which list the number of curves to be read the operation to be preformed and the file name to save the data After the header line the path of the files to be plotted are listed each on a separate line Line 1 Number of Calculations Line s 2 N Operation 1 Operation 1 Line 1 Number of Curves Operation Selection Save File Name Operation 1 Line s 2 Number of Curves th thd acc ths files to be used Line s N M Operation 2 Operation Selection 0 Addition 1 Subtraction Example Input 2 2 0 TH_Add acc 00001TR_X acc 00001TR_Y acc 2 1 TH_Subtract acc 00001TR_X acc 00001TR_Y acc This will perform two operations First the two acc files will be added In the second 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 32 ACS SASSI PREP User Manual 33 operation the two time history files will be subtracted 3 3 3 Frequency This function compares the differences between a list of TFUs and a TFls and finds the frequencies where the difference between the TFI TFU is greatest The function then outputs these frequencies to the user so that a small second frequency set can
50. a a a A 143 3 8 1 View Help TOPICS aioe cc cee la tanakaguntcbelace icncpusdscriidcdaedidetaaied tied ded Ades aaieddted sey doandeleatesiaiens 143 3 8 2 Display About WiINdOW si 5co 5 Ask ae th A de A Raed leant 143 A POOL BAF Ui GOING r r E AE AE E ian EE EAE 144 41 MAIN TOOLBAR mennaan o a a N cisgvOieeesla souesne 144 4 1 1 Write the Analysis Files for the ACS SASSI Modules cccceeeeeeeeeeeeeeeees 145 4 1 2 Request Context Sensitive Help ccccecceeeeeeeeeeeeeeeneeeeeeeeeeeeeeeeeenteeeeeeeeeeees 145 4 2 INSTRUCTION HISTORY TOOL BAR eccceeeeeeeeeeeeeeeeeeeeeeeecneeeeesssneeeeeeenees 145 4 2 1 Run Instruction from the Instruction HiStOry ccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 145 4 2 2 Select Instruction from the Instruction HiStOry eeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 146 4 3 INSTRUCTION LIST TOOLBARS sdasteustinnpisvinatiulvbeneriaganbiniadantiatadna linker nnen nn nennen 146 4 3 1 Run Instruction VWIZAl Oictaiscciaciatitentiredadaneadineadinctada needa miata tabare sence 147 4 3 2 Select Instruction from the Instruction LiSt eecceeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeeeeeeees 147 4 3 3 Load All Instructions into the Instruction LiSt ccececeeeeeeeeeeeeeeeeeeeeeeeteneeeeeees 147 4 3 4 Load General Instructions into the Instruction LiSt ceeeeeeeeeeeeeeeteeeeeeeeees 148 4 3 5 Load Node Instructions into the Instruction LiSt
51. a selected nodal output This option is convenient to be used after we compute new acceleration time histories based on algebraic summation outside the code The resultant time histories can be input to the code to compute their response spectra The setting for response spectrum as 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 106 ACS SASSI PREP User Manual 107 calculations are assumed to the same as for the nodal outputs same calculation frequencies damping and number of time steps To use this option the user needs to check the option Then user needs to browse for the acceleration time histories he wants to select by using for computing their response spectra All the external file names are written in the CONTTRS txt file can be edited by the user The external time history files are required to have the same one column format same time step and duration not smaller or longer than the computed accelerations The external files should have also the extension ACC that is similar to the acceleration histories calculated by the MOTION code Post Processing Options Save TF in All Points Save computed and interpolated acceleration TF in all translational DOFs TFU files Save ACC in All Points Save computed acceleration histories in all translational DOFs ACC files Save RS in All Points Save computed acceleration RS for selected dampings in all translational DOF RS files Save Rotations
52. analysis interrelated modules as shown in Figure 1 1 Note The POINT module has two versions POINT2 and POINTS for 2D and 3D SSI analysis In addition to the 12 SSI modules there are two other software modules related to the ACS SASSI 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 14 ACS SASSI PREP User Manual 15 ANSYS interfacing These two modules are included for the Options A and AA capabilities The LIQUEF and PINT modules that are present in the GUI menus are not included in this version The MAIN PREP and SUBMODELER are the GUI modules programmed in VC These three GUI modules handle all the operations in ACS SASSI from opening model databases building SSI models and running SSI analysis to performing post processing the SSI results Input Analysis Results EQUAKE COOXxxx EQUAKE COOK Monon pS L9 D C5 62 Complex TF Anais gt j comsin RELDISP eas Figure 1 1 ACS SASSI Modular Structure Configuration The ACS SASSI MAIN maintains model information runs the selected modules and shows output files The ACS SASSI PREP module is a pre processor which handles data for all ACS SASSI modules in a user friendly way including graphics comprehensive check and a help system The ANSYS to ACS SASSI and ACS SASSI to ANSYS converters included in the SUBMODELER and PREP modules are programmed in C and are used for translating the ANSYS Versions 11 14 model in cdb file and als
53. and FI methods are much more accurate especially for unstructured excavation meshes The Skin Method is still available only in the baseline version since it was implemented in the original university SASSI code not because of its accuracy or numerical performance merits This method should not be used for nuclear safety related projects and is not included in the Fast Solver code Option FS because it was replaced by the FFV method 16 Combination and Addition of Frequency Steps The combination and addition of frequencies can be accomplished using the COMBIN module as long as the specified frequencies reside on the input tapes For example suppose the program modules SITE and POINT were executed for 10 frequencies 0 98 2 93 4 88 6 84 8 79 10 74 12 70 14 65 15 62 and 17 58Hz and Files9 and File3 were created Furthermore it is assumed that the program module ANALYS was executed only for 5 frequencies which reside on the above mentioned Files9 and File3 The SSI analysis is to be repeated for two new frequencies 2 93 and 15 66 Hz and the results are to be combined with those of the old frequencies Since the new frequencies reside on the above mentioned Files9 and File3 and File4 results are frequency independent the ANALYS module is executed to solve for the new 2 frequencies Subsequently the COMBIN is used to add the computed system response for the two new frequencies to the old ones and create a new solution Files 17 Fle
54. can be selected for incoherent mode effects superposition i Linear or Algebraic Sum approach AS in EPRI report by Short et al 2007 or ii Quadratic approach or SRSS TF in EPRI report by Short et al 2007 Stochastic approach is based simulating random incoherent motion realizations Simulation Mean in EPRI studies Using stochastic simulation algorithms a set of random incoherent motion samples is generated at each foundation SSI interaction nodes For each incoherent motion random sample an incoherent SSI analysis is performed The final mean SSI response is obtained by statistical averaging of SSI response random samples Deterministic approach approximates the mean incoherent SSI response using simple 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 87 ACS SASSI PREP User Manual 88 superposition rules of random incoherency mode effects such as the algebraic sum AS AS in EPRI studies and the square root of the sum of square SRSS SRSS in EPRI studies In this version four deterministic approaches could considered i and ii Linear superposition or Algebraic Sum of the scaled incoherent spatial modes AS in EPRI studies with or without ATF phase adjustment only the approach with phase adjustment used in EPRI studies iii and iv Quadratic superposition of the incoherent modal SSI complex response ATF amplitudes acceleration transfer function amplitudes assuming a zero phase for the in
55. colors Double click a list item to change the color of the corresponding matrix property 3 5 24 Time History Plot Colors Time History Colors Ed Background Color Diagram Color Cancel Axes Color m H Text Color L The following options allow you to customize the colors for the active Time History Plot window Background Color Select this button to change the background color Diagram Color Select this button to change the color for the time history diagram Axes Color Select this button to change the axes color Text Color Select this button to change the text color 3 5 25 Soil Layer Plot Colors The following options allow you to customize the colors for the active Soil Layer Plot window First Layer Color Select this button to change the color for the first layer Last Layer Color Select this button to change the color for the last layer ACS SASSI PREP creates a color scale palette between these two colors Diagram Text Color Select this button to change the text color for the layer numbers in the diagram Diagram Line Color Select this button to change the color of the diagram lines 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 131 ACS SASSI PREP User Manual 132 Legend Text Color Select this button to change the color of the texts for the soil layer properties Soil Layer Colors Ed First Layer Color Last Layer Color Cancel Diagram Text Color Help Diagr
56. command see section 3 5 3 Error 116 Illegal First Node Number for Motion lt i gt e The first node number for motion lt i gt is illegal e Correct the first node number by selecting the Options Analysis command see section 3 5 3 Error 117 Illegal Last Node Number for Motion lt i gt e The last node number for motion lt i gt is illegal e Correct the last node number by selecting the Options Analysis command see section 3 5 3 Error 118 Illegal Spectral Amplification Ratio for Motion lt i gt e One of the spectral amplification factors is not between 0 and 10 e Correct the spectral amplification factor by selecting the Options Analysis command see section 3 5 3 Error 119 Spectral Amplification Ratios for Motion lt i gt Do Not Match Frequencies e The number of spectral amplification ratios must be equal to the number of frequencies from the selected frequency set e Correct the spectral amplification ratios or the frequency set by selecting the Options Analysis command see section 3 5 3 6 2 WARNINGS Warning 1 Gap Found at Node lt n gt Check found a gap at node lt n gt You can define node lt n gt with fixed DOF or AFWRITE see section 5 1 4 will generate it automatically only in the analysis files not in the model with fixed DOF 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 230 ACS SASSI PREP User Manual 231 Warning 2 Distorted Elem
57. drawn as colored polygons one covering 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 153 ACS SASSI PREP User Manual 154 another otherwise all surfaces will be drawn only using lines 4 4 13 Switch Element Shrink On Off Select from the Plot tool bar Shortcut Keys Ctrl S If this button is pressed all elements will appear a little smaller the shrink factor can be set by the Options Window Settings command see section 3 5 15 so that the shape of the elements can be more easily observed 4 4 14 Color Elements by Groups Select from the Plot tool bar Shortcut Keys Ctrl G If this button is pressed all elements will be colored with their group colors This way you can see all elements belonging to each group To change the group colors select the Options Colors command see section 3 5 23 4 4 15 Color Elements by Materials Soil Layers Select mM from the Plot tool bar Shortcut Keys Ctrl M If this button is pressed all elements will be colored with their material soil layer colors This way you can see all elements having each material soil layer To change the material and or soil layer colors select the Options Colors command see section 3 5 23 4 4 16 Color Elements by Beam Spring Properties Select from the Plot tool bar 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 154 ACS SASSI PREP Us
58. ea Ea aa a aa Aapa EE E p ies Gaeta 62 G2 gt DISPiay Fleas Printed coo at Am oh acot nn aea a E a aa ESEE EES 63 AN PPA E A i NEE O E E E E E A E A E 64 6 2 5 Open Specified FIG 4 enous re canenereeaiaedceaeniaeuntinds enaeand eeaead dete aaa ceaeneaeceda anes 65 6 3 RUN SUBMENU ccc ct trae aca nuance abv sete chev acevo nc eaters SCL ks 65 6 3 1 Run the ACS SASSI PREP Pre ProceSsOl ccccceeeeeeeeeeeenceeeeeeeeeeteeeeeeeeeees 66 6 3 2 R n the CONVENED sersa aaa aia a denen E AAA AE T AAEN ee 66 6 3 3 Run the ACS SASSI EQUAKE Module c cecceceeeeeeeeeeeeneeeeeeeeeeeeeeeenaeeeaaaes 68 6 3 4 Run the ACS SASSI SOIL Module sonneennenneesseesesnrrrnrrrserrrrerrrnrrrserrrrrrrrnereeseeee 68 6 3 5 Run the ACS SASSI LIQUEF MOGUIG 2siseriscecsecetdachicandeshesati ctineidestebaedactaccbdesaes 69 6 3 6 Run the ACS SASSI SITE Modules 20 wnkowedauatowad nue tewedaadnGee 69 6 3 7 Run the ACS SASSI POINT Module i0 55n00e nian ee eee eds 70 6 3 8 Run the ACS SASSI HOUSE Module eeeeecccseeceee eee eeeesesceeeeeeeeeeeeeeeaeaea 70 6 3 9 Run the ACS SASSI PINT Module not included in this version 0008 71 6 3 10 Run the ACS SASSI FORCE MOG UG iesccireecceticctticieitnt ech cieienenieeie eerie 71 6 3 11 Run the ACS SASSI ANALYS Module cceeeeceeeeeeeeee cere ee eeeeeeeneeeeeeeeeeeeeeeaaaee 72 6 3 12 Run the ACS SASSI COMBIN Modules s 0 0nucnie einen 72 6 3 13 Run the ACS SASSI MOT
59. find the data file to be displayed by the bubble plot as well as give a title for the plot area 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 49 ACS SASSI PREP User Manual 50 Open Plot Data Data File Title Cancel Data File User input for a file path for a Bubble Data file lt lt Button user can click to open a file open popup window The File Open window will allow the user to graphically search the directory structure to find the bubble data file Title User input which will add an initial title to the plot window when opened After the OK button is pushed the data from the file should be loaded and the Plot should appear The Bubble Plot is a stationary plot 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 50 ACS SASSI PREP User Manual 51 Model File Batch Plot Options Window View Help Beles Ple ells al KR Sl save SCY 7 aFwrite gt 6 Alella 5 33398 4 15072 2 96746 1 78420 b a soanannso E E s s 0 60094 For Help press Fl Model Movement Control The Bubble Plot window controls for model manipulation which allows the user to view the model at different angles The mouse is used to move the model by using a click and drag method The user will click on the plot window with one of the mouse button then drag the mouse across the window The action the program will take
60. for ANSYS Save computed acceleration histories in all rotational DOFs ACC files Restart for TF Compute and save frames for complex TF vector plots animated TFU subdirectory Restart for ACC Compute and save frames for acceleration time history deformed shape animated or bubble plots static ACC and ACCR subdirectories Restart for RS Compute and save frames for RS deformed shape animated or bubble plots static RS subdirectory The three options in this box are to allow the user to generate data for Bubble Vector TF and Deformed Shape plots in all nodes The Save options are to save SSI responses in all DOFs The Restart options generate frame files for graphical animations These frame files are saved in subdirectories TFU RS and ACC and ACCR for rotational accelerations The Save options can be used in tandem with the options in the Node Output data fields 3 5 12 Set the Analysis Options for the ACS SASSI STRESS Module The main function of the ACS SASSI STRESS module is to compute and output maximum 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 107 ACS SASSI PREP User Manual 108 stresses forces or moments in the elements The user may also request time histories of those components to be printed and saved Analysis Options Operation Mode m Type of Analysis Solution Seismic Output Control Auto Computation of Strains in Soil El
61. for isolated foundations linear or nonlinear SSI analysis The ACS SASSI NQA Version 3 0 includes a set of 44 SSI verification problems many of these including several subproblems The Verification Manual has 270 pages including 264 figures In these V amp V problems the computed SSI results using ACS SASSI are compared against benchmark results based on published analytical solutions or computed using other validated with computer programs including SHAKE91 SASSI2000 and ANSYS Each SSI verification problem tests a different capability of the ACS SASSI NQA code The total number of the V amp V computer input files and output files for all the SSI verification problems of the ACS SASSI NQA version is about 5 000 files that require about 300 MB hard drive space 1 2 SPECIFIC SSI MODEL SIZE RESTRICTIONS The ACS SASSI Version 3 0 baseline code has been extensively verified tested and used for seismic 3D soil structure interaction models up to 25 000 nodes including up to 5 000 interaction nodes However for 20 000 node or slightly larger size SSI problems the baseline code becomes highly inefficient on regular PCs with 16GB RAM since the analysis run time and the disk storage go out of hand Much larger RAM is required to run larger size problems Note That sometimes depending on a case by case situation the number of interaction nodes that can be considered for incoherent SSI analysis could be less than the size array limitation of 5 000 no
62. for soil sites and 50Hz 70Hz for rock sites 10 Selection of SSI Frequencies The frequencies to be selected for the SSI analysis depend on the frequency components of the input motion and system response i e the narrowness the relative amplitude of spectral peaks of the response quantity of interest number of peaks in the transfer functions and how close the spectral peaks are located relative to each other This information can be preliminary evaluated based on the fixed base analysis of the structure and previous experiences The fixed base natural frequencies will give some hints on the approximate location of the peaks in the structure and the importance of each peak can be seen from either the mode participation factors or the fixed base transfer functions However the user is warned that the SSI effects may drastically affect both the effective stiffness and damping of the structure soil system Therefore the investigator must be very careful when interpreting fixed base results for extrapolation to the SSI analysis The frequency interpolation scheme of complex transfer functions incorporated into the program since the effect of the soil structure interaction is to flatten the sharp peaks sometimes eliminates some of the structural peaks Usually using no more than 40 80 frequencies is sufficient for the SSI solution for simple structures or stick models However for complex FE models the number of frequencies should be between 1
63. for the BEAM element number 45 that belongs to Group 3 See Table 1 for more details on SSI response text files The STRESS module in addition to the above files also generates an important text file named ELEMENT _CENTER_ABS MAX_STRESSES TXT that contains the maximum element stress components in the center of the elements calculated by STRESS for all the selected elements by the user WARNING This element center stress results are not usable for beam elements for which the nodal forces and moments are needed not in the center of the elements The center stress results are useful only for shell solid and spring elements The format of this file is as follows for a model with n groups of groups 1st group element type group ordered group of elements in group 2 group element type group ordered group of elements in group nth group element type group n ordered group of elements in group 1st group element type group ordered group element stress comp 1 stress comp 2 stress comp 3 stress comp 4 stress comp 5 stress comp 6 Example of ELEMENT_CENTER_ABS_MAX_STRESSES TXT 3 SOLID 1 1 3 SHELL 2 1 1 SOLID 3 2 5 SOLID 1 1 1 0 69504 0 61290 0 93326 0 21454 1 36011 0 45008 2 0 82394 0 70086 0 68225 0 20217 0 65360 0 34301 3 1 63296 1 09535 1 41437 0 49395 1 40079 0 39915 SHELL 2 1 1 6 98477 12 51727 9 28106 0 87311 0 58065 0 44423 SOLID 2 2 1 1 07909 1 12969 1 91
64. freedom will be considered by the Relative Displacement module 5 2 NODE INSTRUCTIONS This instruction group was designed for defining node coordinates cinematic conditions and local coordinate systems The node instructions are Instruction Action Description CSYS Activates a coordinate system section 5 2 1 D Sets boundary conditions section 5 2 2 FILL Generates a node line section 5 2 3 GLOBAL Transforms nodes into the global section 5 2 4 coordinate system INT Sets interaction interface section 5 2 5 intermediate or internal nodes INTLIST Lists interaction interface section 5 2 6 intermediate or internal nodes LMOVE Generates a node list by translation section 5 2 7 LOC Defines a local coordinate system with section 5 2 8 Euler angles LOCAL Defines a local coordinate system with section 5 2 9 nodes N Defines a node section 5 2 10 NDEL Deletes nodes section 5 2 11 NGEN Generates nodes by copying a node section 5 2 12 pattern NLIST Lists nodes section 5 2 13 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 182 ACS SASSI PREP User Manual 183 Instruction Action Description NMED Defines a node with average section 5 2 14 coordinates NMOD Modifies a defined node section 5 2 15 NMOVE Generates a node list by scaling section 5 2 16 NSCALE Scales nodal coordinates section 5 2 17 SDEL Deletes coordinate systems section 5 2 18 SLIST Lists coordinate systems
65. frequencies from frequency set 1 take frequencies from File1 or File9 lt ang gt coordinate transformation angle lt XC gt x coordinate of control point lt yc gt y coordinate of control point lt ZC gt z coordinate of control point 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 163 ACS SASSI PREP User Manual 164 lt impe gt calculation mode for the global impedances of the foundation 0 no calculations 1 calculate the global impedances and then obtain the transfer functions for the seismic SSI system 2 calculate the global impedances and stop Note This instruction is provided for input files To set the analysis options for the ACS SASSI ANALYS module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 10 5 1 7 Set Options for AFWRITE and CHECK AOPT lt EQUAKE gt lt SOIL gt lt LIQ gt lt SITE gt lt POINT gt lt HOUSE gt lt DEP gt lt FORCE gt lt A NALYS gt lt COMBIN gt lt MOTION gt lt STRESS gt lt RELDISP gt sets the AFWRITE and CHECK options for modules SITE POINT HOUSE FORCE ANALYS COMBIN MOTION and STRESS and RELDISP in this order LIQ module is not included in this version If lt opt gt is zero the corresponding module will not be taken into account by the AFWRITE and CHECK instructions see sections 5 1 4 and 5 1 8 lt EQUAKE gt Flag for EQUAKE module lt SOIL gt Flag for SOIL module
66. gt sets the terms belonging the real part of the stiffness matrix of matrix property lt p gt row lt row gt to lt t1 gt lt t12 gt If the matrix property lt p gt does not exist it will be created by this command Since the matrix is upper diagonal enter only the required number of terms from the diagonal to the right i e for the first row use lt t1 gt lt t12 gt for the second row lt t1 gt lt t11 gt and for the last row lt row gt 12 only lt t1 gt WARNING The real part matrix values should be not left zero If there is no real stiffness associated with the general element please then input 1 0e 6 numerical value 5 3 37 Define a Real Property R lt nm gt lt axial gt lt shear2 gt lt shear3 gt lt tors gt lt flex2 gt lt flex3 gt defines the real property set number lt nm gt with axial area lt axial gt shear area for local axis 2 lt shear2 gt shear area for local axis 3 lt shear3 gt torsional inertia moment lt tors gt flexural inertia moment for local axis 2 lt flex2 gt and flexural inertia moment for local axis 3 lt flex3 gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 201 ACS SASSI PREP User Manual 202 l2 Ig rer 4 f fs 10 9 A nr 3 T nr 2 l hb 12 l3 bh 12 f2 f 6 5 A bh J 1 3 0 21 bh 1 b 12h hb Figure 5 6 Flexural area moment of inertia l23 cross sectional area A to
67. hide the status panel which displays the active database active model and the running modules A check mark appears next to the menu item when the status panel is displayed The status panel displays the state of the ACS SASSI modules The check box shows if the corresponding module is running and the progress bar shows the module state T EQUAKE Module T SOIL Module M LIQUEF Module T SITE Module 6 7 4 Activate Specified Window Select 1 2 3 4 from the View submenu ACS SASSI MAIN displays a list of currently open document windows at the bottom of the View menu A check mark appears in front of the document name of the active window Choose a document from this list to make its window active 6 8 HELP SUBMENU 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 82 ACS SASSI MAIN User Manual 83 ACS SASSI MAIN iof x Model File Run RunAll Options Window View ajel elaj E Blolm ala Het About EQUAKE Module T SOIL Module CE invier ss D SASSI models sdb e202 Ls 6 8 1 View Help Topics Select Help Topics from the Help submenu Use this command to display the opening screen of Help From the opening screen you can jump to step by step instructions for using ACS SASSI MAIN and various types of reference information Once you open Help you can click the Contents button whenever you want to return to the opening screen You may use the Context Help command to obt
68. i Ha Select it sities a Deselect ZMin ZMax I Select All I Deselect All Invert T Select All Deselect M Deselect All Help T Deselect Ay oae Groups Materials Soil Layers Beam Prop Spring Prop Matrix Prop elle Type Elem SOLID 88 BEAMS 18 BEAMS 32 The following options allow you to select the elements to be shown in the active Model Plot window Nodes Use this group box to select elements with specified nodes Type values into the NMin and NMax edit boxes to select the elements which nodes are in this range Type values into the XMin XMax YMin YMax ZMin and ZMax edit boxes to define a clipping box Set the Select All check box to select all nodes Set the Deselect All check box to deselect all nodes Set the Deselect check box if the specified nodes range or clipping box should be deselected Click the Apply button after you set all node selection options If you combine options for all nodes and options for specific nodes ACS SASSI PREP first applies the options for all nodes then the options for the specified nodes range or clipping box Elements Type the group number for the desired elements in the Group edit box Type values into the EMin and EMax edit boxes to select the elements in this range Set the Select All check box to select all elements from all groups Set the Deselect All check box to deselect all elements from all groups Set the Deselect check box if the
69. in SOIL options Frequency Step Type the frequency step Hz It should be zero if the time step value is input Time Step of Control Motion Type the time step of control motion sec Nr of Fourier Components Type the number of values to be used in the Fourier transform The value should be a power of 2 otherwise ACS SASSI PREP uses the closest power of 2 and generates a warning message For a time history analysis the time step and number of Fourier components for the selected time history of the control motion must both be defined and the frequency step may be left blank ACS SASSI SITE computes the corresponding frequency step 1 time step number of Fourier components This frequency step may then be used to set up the frequency numbers in the specified frequency set For a single harmonic analysis the frequency step must be given and may be directly used to set up frequency numbers in the specified frequency set In this case the time step of control motion and the number of Fourier components are not used and therefore may be left blank Frequency Set Number Type the number of the frequency set created with the FREQ instruction see section 5 1 17 page 167 The frequency numbers from the specified set must be positive integer numbers ACS SASSI SITE will automatically reorder the frequency numbers in ascending order and will stop if two or more equal frequency numbers are detected The frequencies are obtained by multipl
70. input text file that contains the response spectrum amplitudes with the extension rsi in Demo 1 The input file format is two columns frequency and amplitude for a given damping ratio The computed 5 damping response spectrum will have no point with more than 10 below the target spectra and no more than 30 larger than the target response spectrum 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 26 ACS SASSI MAIN User Manual 27 at any frequency No more than 9 adjacent frequency points falling below the target response spectrum are permitted The EQUAKE module also computes a few feature parameters of the computed acceleration time histories such as strong motion duration between Arias intensities 5 and 75 V A and AD V A peak ground acceleration V peak ground velocity D peak ground displacement If more than one component acceleration time history is generated then the stationary and non stationary cross correlation coefficients are computed If the user gives the target power spectral density PSD EQUAKE checks if the generated acceleration time history meets power spectral density requirements The EQUAKE input file has extension equ and it is created by the AFWRITE command The generated accelerograms are then used for site response analysis and SSI analysis through the SOIL MOTION and STRESS modules The EQUAKE module computes the response spectra rso file po
71. is determined by which mouse button is pressed Left Mouse Button Rotate model around center of mass Middle Mouse Button Move model across screen Right Mouse Button Zoom in out on the model Also Keyboard Buttons have been enabled to give the user a more precise control of rotation Insert Delete Rotate around the X axis 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 51 ACS SASSI PREP User Manual 52 Home End Rotate around the Y axis Page Up Page Down Rotate around the Z axis You may change the drawing options using the following commands Options Window Settings see section 3 5 20 Options Colors see section 3 5 28 or Options Font see section 3 5 29 The Print command has been disabled for this window However if the user wants to print data in this window the use of the Export Image command is suggested see section 3 2 2 Data File Format The format of the file to be loaded is an ASCII file with a small header which consists of the number of nodes in the file and a default scaling factor which is ignored by this plot but is require by file reader The rest of the file is the list of node numbers and the X Y Z data component at the node This file format allows the user to specify data for any subset s of node s in the model The file is in a white space delimited free format so there must be at lease one space between numbers 3 4 10 Open Ve
72. lower boundary Using the value of 10 to 20 is recommended for a good half space simulation Half Space Layer Type the number of the soil layer property associated with the half space or baserock properties see L instruction section 5 3 21 Top Layers The inputs in this list box defined the soil layer numbers by items order and low strain material number above the visco elastic half space Type a list containing the numbers of the soil layers created with the L instruction see section 5 3 21 defining the soil structure The allowed separators are blank tab and enter The maximum 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 71 ACS SASSI PREP User Manual 72 number of soil layer numbers is 200 The first number corresponds to the topmost layer To view the soil layers select the Plot Layers command see section Error Reference source not found Tip If two or more top layers have the same properties simply use the same soil layer number instead of defining soil layers with the same properties Soil properties should be consistent in SOIL and SITE modules if non linear SSI analysis is performed R SV and P Waves Select this option if your model uses a combination of P SV and R waves use for 1D and 3D analyses SH and L Waves Select this option if your model uses a combination of SH and L waves use for 1D and 3D analyses The seismic environment may be assumed
73. new Deformed Shapes Window When this command is first entered it will bring up the Open Plot Data window where the user can find the data file to be displayed by the bubble plot as well as give a title for the plot area 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 57 ACS SASSI PREP User Manual 58 Open Plot Data Data File Title Data File User input for a file path for a Deformed Shapes Animation Data file lt lt Button user can click to open a file open popup window The File Open window will allow the user to graphically search the directory structure to find the bubble Deformed Shapes Animation Data file Title User input which will add an initial title to the plot window when opened After the OK button is pushed the data from the file should be loaded and the Plot should appear The Deformed Shapes Plot is a animated plot window 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 58 ACS SASSI PREP User Manual 59 Modema in Ope Biles 2 eles xla Sa E Z lapwrite 8 Alea ajal Y gt SSS Frame 561 For Help press Fl Model Movement Control The Deformed Shapes Plot window controls for model manipulation which allows the user to view the model at different angles The mouse is used to move the model by using a click and drag method The user will click on the plot window with one of the mouse button
74. no averaging Smoothing Parameter 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 109 ACS SASSI PREP User Manual 110 The smoothing parameter is used optionally to filter the potential spurious spectral sharp peaks and valleys that could be artificially introduced by the original SASSI interpolation scheme for transfer functions Using the ACS SASSI spectrum plot capability the analyst could investigate the effects of smoothing parameter values on the SSI results by comparing for selected nodes the computed and the interpolated amplitude transfer functions that are saved on hard drive in text files with the extensions TFU and TFI Smoothing parameter values vary typically between 10 and 1000 WARNING Sensitivity studies are recommended before the final smoothing parameter value is decided for the SSI production runs Acceleration Time History Input Number of Fourier Components Type the number of values to be used in the Fourier transform The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Time Step of Control Motion Type the time step of control motion sec The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Frequency Set Number Type the number of the frequency set The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Multiplication Factor Type the multiplication factor for scali
75. no gt th pair of spectra correlation values to lt time gt and lt val gt for the ACS SASSI EQUAKE module Note This instruction is provided for input files To change correlation values from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 10 Add Reset Damping Ratios for RS Analysis DAMP lt d1 gt lt d2 gt lt d3 gt lt d4 gt lt d5 gt lt d6 gt lt d7 gt lt d8 gt lt d9 gt lt d10 gt adds non zero parameters to damping ratio list or deletes damping ratios if lt d1 gt is zero Note This instruction is provided for input files To change damping ratios from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 11 Delete a Model DEL lt modelname gt deletes the model lt modelname gt do not specify path from the active database All internal files will be deleted The directory of the model will not be deleted Note This instruction is provided for input files To delete a model from the ACS SASSI PREP desktop use the Model Open command and click the Delete button see section 3 1 5 5 1 12 Define Data for Dynamic Soil Properties DYNP lt label gt lt no gt lt Sg gt lt 9 gt lt Sd gt lt d gt lt label gt sets the values for the lt no gt th pair of the shear strain shear modulus curve to lt sg gt and lt g gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 165 ACS SASSI PREP User
76. numbers for each wave type in the defined coordinate system Then once the composition of the wave types causing the seismic environment and the nature of the control motion is known ACS SASSI SITE will scale and superimpose the results of all the wave types These results are then stored in FILE1 which is used later for seismic analysis Thus this file will not be generated for foundation vibration analysis If the seismic environment is the same for a two and three dimensional case the information from FILE1 can be used for both problems The following options allow you to specify the analysis options for ACS SASSI SITE module Operation Mode Select the operation mode from Linear Soil and Nonlinear Soil This selection will generate the SSI analysis input for SITE using the low strain values or iterated values for the soil properties NOTE The units for the soil parameter input data for SITE and SOIL should be consistent either in BS or IS units kip ft ksf kcf or KN m KN m2 KN m3 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 69 ACS SASSI PREP User Manual 70 The check boxes Mode and Mode2 enable disable the two basic operation modes of module SITE Mode 1 Acceleration of Gravity Type the acceleration of gravity in ft sec2 for BS or m sec2 for IS This acceleration of gravity value is used for SSI analysis A change of this value does not affect the value used for free field analysis
77. of halfspace simulation the program automatically adds an additional soil layer below the top layer with the thickness of 1 5 V f where Vs is the shear wave velocity of the halfspace and f is the frequency of analysis This added soil layer is further subdivided into a number of computational sublayers specified by the user in program module SITE In addition to this the viscous dashpots are added to the base of the new soil model The input parameter for the number of sublayers is recommended to be set to 20 sublayers If number of computational sublayers is zero there is no halfspace simulation 9 Cut off Frequency The cut off frequency is an important SSI analysis parameter since it not only sets an upper limit on the number of frequencies to be analyzed but also controls the SSI model size by constraining the maximum allowable element sizes and thus the sizes of the stiffness and mass matrices of the SSI problem The SSI cut off frequency depends on the soil site conditions and seismic input frequency content and has a large impact on SSI run time 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 44 ACS SASSI MAIN User Manual 45 The factors governing the selection of the cut off frequency are a The frequency content of the input motion b The dominant frequencies of the entire system c The time increment of the input time history The cut off frequency varies typically between 30Hz 40Hz
78. of lines for each listing page Keep Screen Output Printing for OUT Select this option if you want to keep the output printing when an output file is open Lines Page fi 5 Cancel I Keep Screen Output Printing for OUT Help Model Plot Window Settings Shrink Factor 0 0 5 STAN Zoom Factor 0 100000 Cancel H Rotation Increment 10 000000 Help Y Rotation Increment fi 0 000000 Distance 2 500000 Vertical Axis CX cy eZ MV Perspective I Mass Value I Background Opaque The following options allow you to customize the active Model Plot window Shrink Factor Type the shrink factor This factor specifies how much an element is shrunk Zoom Factor Type the zoom factor This factor specifies how much the model is zoomed at a single 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 121 ACS SASSI PREP User Manual 122 zooming operation H Rotation Increment Type the horizontal rotation increment degrees V Rotation Increment Type the vertical rotation increment degrees Distance Type the distance between the viewpoint and the model for perspective view only Perspective Sets the view type to perspective checked or parallel unchecked Mass Value Select this option if you want ACS SASSI PREP to display mass values next to with their symbols Background Opaque If this option is set all displayed text will be surrounded by a rectangle in the background s colo
79. of material properties between lt m1 gt and lt m2 gt default last defined with step lt step gt default 1 5 3 26 Modify a Soil Layer MODL lt nm gt lt thick gt lt weight gt lt pveloc gt lt sveloc gt lt pdamp gt lt sdamp gt modifies the soil layer number lt nm gt with thickness lt thick gt specific weight lt weight gt P wave velocity lt pveloc gt S wave velocity lt sveloc gt P wave damping ratio lt pdamp gt and S wave damping ratio lt sdamp gt If one of the parameters lt thick gt lt sdamp gt is zero the old value will be left unchanged To set a value to zero use a number less or equal to 1e 20 or z 5 3 27 Modify a Material MODM lt nm gt lt val1 gt lt val2 gt lt weight gt lt pdamp gt lt sdamp gt lt type gt modifies the material number lt nm gt If lt type gt 1 lt val1 gt is the elasticity modulus and lt val2 gt is the poisson coefficient if lt type gt 2 lt vall gt and lt val2 gt are the constrained and shear moduli and if lt type gt 3 lt val1 gt and lt val2 gt are the P and S Wave velocities For all cases lt weight gt is the specific weight lt pdamp gt is the P wave damping ratio and lt sdamp gt is the S wave damping ratio If one of the parameters lt val1 gt lt type gt is zero the old value will be left unchanged To set a value lt vali gt lt sdamp gt to zero use a number less or equal to 1e 20 or z 5 3 28 M
80. or A The Option A ACS SASSI ANSYS interfacing capability is based on an integrated two step SSI approach the 15t step is the overall SSI or SSSI analysis using the ACS SASSI model and the 2 step is the detailed structural stress analysis using the ANSYS model with 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 8 ACS SASSI PREP User Manual 9 the input boundary conditions defined by the SSI responses from ACS SASSI The 2 step can have two distinct functionalities i perform structural stress analysis using refined ANSYS FE structural models with detailed meshes eventually including enhanced element types non linear material and plasticity effects contact and gap elements and ii compute seismic soil pressure on basement walls and slabs including soil material plasticity foundation soil separation and sliding using refined ANSYS FE soil deposit models OPTION Advanced ANSYS or AA The Option AA ACS SASSI ANSYS integration capability consists of using directly an ANSYS structural model for SSI analysis without the need for converting the structural model to ACS SASSI The ANSYS structural stiffness mass and damping matrices from ANSYS are used directly by ACS SASSI for the seismic SSI analysis Relative displacements absolute accelerations and response spectra can be fully computed in ACS SASSI For computing structural stresses the Option A should be used to transfer the SSI response motions at all time
81. p gt Is not Defined e One of the model s GENERAL elements uses matrix property lt p gt which is not defined e Check the elements for property indices or define matrix property lt p gt see instructions MXR MXI and MXM sections 5 3 36 5 3 33 and 5 3 35 Error 84 No RS Input Files Specified e All three spectrum input files for ACS SASSI EQUAKE module are left blank e Set at least one spectrum input file by selecting the Options Analysis command see section 3 5 3 Error 85 RS Input File lt i gt Does Not Exist 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 224 ACS SASSI PREP User Manual 225 e The spectrum input file lt i gt for ACS SASSI EQUAKE module does not exist e Set the spectrum input file lt i gt by selecting the Options Analysis command see section 3 5 3 Error 86 Invalid RS Output File lt i gt e The spectrum output file lt i gt for ACS SASSI EQUAKE module is left blank e Set the spectrum output file lt i gt by selecting the Options Analysis command see section 3 5 3 Error 87 Invalid Acceleration Output File lt i gt e The acceleration output file lt i gt for ACS SASSI EQUAKE module is left blank e Set the acceleration output file lt i gt by selecting the Options Analysis command see section 3 5 3 Error 88 Invalid Acceleration Input File lt i gt e The acceleration input file lt i gt for ACS SASSI EQUAKE module is left blan
82. plotting can be either static maximum values or animated time varying values at selected time frames automatic frame selection is included Maximum element center stresses values are also available in a convenient text file format xii Computation and contour plotting of seismic soil pressure on foundation walls using near field SOLID elements The nodal pressure is computed based on averaging of adjacent element center pressures Both maximum and time varying values of nodal seismic pressures are computed and available for plotting The analyst can also automatically combine the seismic soil pressures with the static soil bearing pressures and then plot the resultant soil pressure of foundation walls and mat Contour seismic soil pressure plotting can be either static contour plots of maximum values or animated contour plots of time varying values at selected time frames an automatic frame selection capability is included xiii Post SSI run calculations for superposition of the co directional SSI effects in terms of acceleration displacement of stress time histories and in structure response spectra For time histories both the algebraic summation and subtraction is available For in structure response spectra i the weighted linear combination and ii the square root of sum of square SRSS combination are implemented The analyst can also compute the average in structure response spectra ISRS from multiple spectral curves These post proce
83. print dialog box to start a print job Next Page Preview the next printed page Prev Page Preview the previous printed page One Page Two Page Preview one or two printed pages at a time Zoom In Take a closer look at the printed page Zoom Out Take a larger look at the printed page Close Return from print preview to the editing window 6 2 4 Print a File Select Print from the File submenu Shortcuts Tool bar Keys Ctrl P Use this command to print a document This command presents a Print dialog box where you may specify the range of pages to be printed the number of copies the destination printer and other printer setup options 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 64 ACS SASSI MAIN User Manual 65 Print HEI Printer Name HP LaserJet 5L Properties Status Default printer Ready Type HP Laserdet 5L Where LPT1 Comment T Print to file m Print range m Copies All Number of copies 1 Pages from fi to C Selection bl el eI E Collate Cancel Printer This is the active printer and printer connection Choose the Properties button to change the printer and printer connection Properties Displays a Print Setup dialog box see section 6 2 2 page 62 so you can select a printer and printer connection Print Range Specify the pages you want to print All Prints the entire document Selection Prints t
84. section 5 2 19 5 2 1 Activate a Coordinate System CSYS lt ns gt activates the local system number lt ns gt To activate the global system lt ns gt must be set to 0 5 2 2 Set Boundary Conditions D lt n1 gt lt n2 gt lt inc gt lt val gt lt labe1 gt lt label2 gt lt label6 gt where lt label i gt can be UX UY UZ DISP ROTX ROTY ROTZ ROT or ALL defines the boundary conditions for the nodes between lt ni gt and lt n2 gt with step lt inc gt lt val gt 0 for free DOF lt val gt 1 for fixed DOF and lt val gt 2 for DOF controlled by another node rigid body This instruction is used to generate the cinematic boundary conditions after the nodes have been previously defined This fact allows a greater flexibility for the node generation procedure The default values are 0 for lt val gt and 1 for lt inc gt Note Concentrated masses see MT and MA instructions sections 5 4 18 and 5 4 11 forces see F instruction section 5 4 1 or moments forces see MM instruction section 5 4 7 may be applied at the free degrees of freedom A fixed degree of freedom does not allow the node to translate or rotate in that direction Any concentrated masses or forces assigned to this degree of freedom are ignored by ACS SASSI PREP Removing unwanted degrees of freedom has the advantage of reducing the size of the set of equations that must be solved The following table lists the degrees of freedom that
85. see section 4 3 2 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 148 ACS SASSI PREP User Manual 149 4 4 PLOT TOOL BAR arial To hide or display the tool bar choose the View Tool Bars command see section 3 7 3 k E A e e a E S e a e a e e e E E a we 2 Action Rotates the model to the left Rotates the model to the right Rotates the model upward Rotates the model downward Resets the model rotation Enlarges the model view Shrinks the model view Defines zooming rectangle Resets the model size Sets the view center Resets the view center Switches hidden lines on off Switches element shrink on off Colors elements by groups Colors elements by materials soil layers Colors elements by beam spring properties Displays node numbers Displays element numbers Displays group numbers Displays symbols for boundary conditions Detailed Description section 4 4 1 section 4 4 2 section 4 4 3 section 4 4 4 section 4 4 5 section 4 4 6 section 4 4 7 section 4 4 8 section 4 4 9 section 4 4 10 section 4 4 11 section 4 4 12 section 4 4 13 section 4 4 14 section 4 4 15 section 4 4 16 section 4 4 17 section4 4 18 section 4 4 19 section 4 4 20 4 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 149 ACS SASSI PREP User Manual 150 Button Action Detailed Description Displays symbols for masses sectio
86. specified 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 135 ACS SASSI PREP User Manual 136 elements should be deselected Click the Apply button after you set all element selection options If you combine options for all elements and options for specific elements ACS SASSI PREP first applies the options for all elements then the options for the specified elements Groups Select this page to select deselect elements by their group Materials Select this page to select deselect elements by their material Soil Layers Select this page to select deselect elements by their soil layer Beam Prop Select this page to select deselect elements by their beam property Spring Prop Select this page to select deselect elements by their spring properties Matrix Prop Select this page to select deselect elements by their matrix properties The first column of the list box shows the selection state Click the Select button to select the corresponding items from the list box Click the Deselect button to deselect the corresponding items from the list box Click the nvert button to invert the selection state of the corresponding items Set the All check box for performing selection deselection or inversion of all items in the list box Note To deselect a single element from the active Model Plot window move the mouse cursor over it and click the left mouse button while holding down the Shift key The c
87. specified material instruction MODM see section 5 3 27 Error 15 Poisson Coefficient from Material lt m gt Is Illegal e The Poisson coefficient from material lt m gt has a negative or zero value e Correct the Poisson coefficient from the specified material instruction MODM see section 5 3 27 Error 16 Specific Weight from Material lt m gt Is Illegal e The specific weight from material lt m gt has a negative value e Correct the specific weight from the specified material instruction MODM see section 5 3 27 Error 17 P Wave Damping Ratio from Material lt m gt Is Illegal e The P wave damping ratio from material lt m gt has a negative value e Correct the P wave damping ratio from the specified material instruction MODM see section 5 3 27 Error 18 S Wave Damping Ratio from Material lt m gt Is Illegal 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 213 ACS SASSI PREP User Manual 214 e The S wave damping ratio from material lt m gt has a negative value e Correct the S wave damping ratio from the specified material instruction MODM see section 5 3 27 Error 19 Soil Layer lt I gt Is not Defined e One of the model s elements uses soil layer lt l gt which is not defined e Check the elements for material soil layer indices check element type or define soil layer lt l gt use instruction L see section 5 3 21 Error 20 Thickness from Soil L
88. steps or selected critical steps as boundary conditions for ANSYS superstructure model Automatic commands are used to transfer the data from the ACS SASSI result database to the ANSYS input files The ACS SASSI ANSYS interface modules the LOADGEN and SUBMODELER that are used in Options A and AA are described in a separate manuals called ACS SASSI MAIN Integration Capability OPTION Fast Solver or FS The fast solver capability includes new SSI modules for the HOUSEFS and ANALYSFS modules that replace the baseline software HOUSE and ANALYS modules The fast solver option is highly recommended for larger size SSI models with up to 100 000 nodes and more than 2 500 interaction nodes For very small size SSI models the standard solver competes in speed with the fast solver The ACS SASSI fast solver modules HOUSEFS and ANALYSFS that are included in Option FS replace the standard solver modules HOUSE and ANALYS modules The replacement is accomplished by changing the paths for the two module executables in the ACS SASSI MAIN menu 1 1 DESCRIPTION OF ACS SASSI CAPABILITIES The ACS SASSI Version 3 0 SSI capabilities incorporate many advanced algorithms and specialized features In comparison with the standard SASSI methodology as implemented in the university SASSI2000 code the ACS SASSI incorporates many additional SSI capabilities and specialized features in addition to its much faster computational speed i
89. stiffnesses of the two coupled subsystems structure and excavated soil characterizes SSI interaction effects for an embedded foundation problem As a simple example if the complex dynamic stiffness of the structure is equal to the complex dynamic stiffness of the excavated soil at all excavated soil nodes then the difference is zero and there is no SSI interaction The larger is the difference between these two coupled subsystems the larger are the SSI effects on the response of the embedded structure Structure Minus Flexible Volume SSI Substructuring Excavated Soil No Mass Structure No wave scattering analysis Impedance problem is trivial reduced to a free field problem Structural dynamic problem slightly more complex since includes a coupled excavated soil gt e o o e 0o 0o oo Each load case solved fastusing axisymetric soilmodel Excavated Soil Model Figure 2 1 Flexible Volume Method Concept The FI methods are based on numerical simplifications that were commonly used in the engineering practice in order to reduce the large computational effort associated with SSI analysis of structures embedded in soil The difference between the FV and FI methods is that in the FV method or Direct method all the excavated soil dynamic degrees of freedom are considered to be interaction nodes for computing the SSI solution while for the FI methods or Subtraction Method or Modified Subtraction Method only a
90. structural dynamic behavior ix Computation and visualization of the amplitude TF or spectral accelerations for a selected damping value at a given SSI calculation frequency for the entire SSI model using either structural deformed shape or bubble plots The deformed shape plots are animated structural plots with a controlled movie frame speed so that they can be also viewed as static plots For selected resonant frequencies the spectral amplitudes or the ZPA values could be plotted as a deformed shape plot x Computation and visualization of structural acceleration and relative displacement time histories using structural deformed shape plots The deformed shape plots can be static structural plots for selected times or maximum values or structural animations of the SSI response variation in time during the earthquake action xi Computation and contour plotting of the average nodal seismic stresses for all six components in global coordinates in the entire structure or for selected parts of the structure based on the computed element center stresses for the SHELL and SOLID elements Both maximum and time varying values of nodal stresses are computed and available for plotting The approximation is based on the assumption that element center and node stresses are equal no shape function extrapolation is included For sufficiently refined finite element models this approximation appears reasonable Contour stress plotting can be either sta
91. studies The AS approach is few times faster than the stochastic approach the incoherent SSI run time using AS is about equal to the coherent SSI run time The SRSS approach is more difficult to use and is more time consuming than the stochastic approach or AS SRSS has been made available in ACS SASSI per nuclear industry request for benchmarking purposes since this approach was benchmarked and validated in the EPRI reports rather than for its practicality or numerical efficiency merits The AS and SRSS deterministic approaches could be applied to simple stick models with rigid mats AS and SRSS were evaluated by EPRI only for stick models with rigid mats Their use for complex FE models with flexible foundation have to be demonstrated by preliminary sensitivity studies that should show that at the corner locations of the structural floors the ISRS estimates obtained using AS or SRSS are reasonable The SRSS results could be improved at a certain level by adding more incoherent spatial modes in the SSI analysis For stick models with rigid mats the use of 10 incoherent modes is usually sufficient but for large size flexible mat models the use of tens or even hundreds of incoherent modes might be 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 42 ACS SASSI MAIN User Manual 43 needed to get a reasonable accuracy for SSI results Ghiocel 2013b SRSS has also a conceptual limitation since it neglects cou
92. subset of the excavated soil dynamic degrees of freedom are used as interaction nodes for computing the SSI solution in complex frequency The consideration of limited number of degrees of freedom for interaction nodes in the FI methods results in a more approximate solution in comparison to the FV method that includes all the excavated soil degrees of freedom as interaction nodes for SSI calculations The SSI system is partitioned into three coupled substructures namely the free field system the structural system and the excavated soil system as shown in Figure 2 2 The FE model part consists of the structural system minus excavated soil system In the FV method the interaction between structure and foundation occurs at all excavated soil nodes while in the FI methods in either FSIN or EVBN implementation the interaction nodes are defined only on the excavation volume lateral surface Thus the FI methods are 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 20 ACS SASSI MAIN User Manual 21 S BF l Free Field Problem Structure Excavated Soil SSI Problem FV a The FV Method Direct sS w it B m7 Structure Excavated Soil SSI Problem Fl EVBN b The FI EVBN Method Modified Subtraction much faster than the FV method Free Field Problem Figure 2 2 The Flexible Volume SSI Substructuring Approaches For the FI FSIN method or Subtr
93. the PILE command lt pile gt is the value of the lt pilenum gt attached to the node lt control node gt is number of another node The control node can be used to constrain the DOF of the node being defined which allows for a rigid body definition The default values for lt x gt lt y gt lt z gt lt pile gt lt control node gt are 0 See also CSYS LOC and LOCAL instructions for local coordinate systems Note The node numbering is arbitrary However in order to minimize storage and block operations as well as to provide flexibility for restart analysis with a new superstructure and for the incoherence analysis option it is required to number the nodes at or below ground surface first layer by layer starting from the bottom The z coordinate must always be chosen vertical upward and the right hand rule must be used to set X and Y coordinates For 1D and 2D analysis the program ignores the y coordinate of the nodal points 5 2 11 Delete Nodes NDEL lt n1 gt lt n2 gt lt inc gt deletes the node set defined by lt n1 gt lt n2 gt with step lt inc gt The default value for lt n2 gt is lt ni gt and the default value for lt inc gt is 1 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 186 ACS SASSI PREP User Manual 187 5 2 12 Generate Nodes by Copying a Node Pattern NGEN lt itim gt lt step gt lt n1 gt lt n2 gt lt inc gt lt dx gt lt dy gt
94. the SRSS approach a preliminary investigation to establish the required number of incoherent modes is recommended The HOUSE output shows the cumulative modal mass variance contributions at all SSI frequencies search for the string I N C O in the HOUSE output For a limited number of incoherent modes the cumulative mode contributions could be much less than 100 We suggest to consider a number of incoherent modes that satisfies the 90 mode contribution criterion similar to the cumulative modal mass criterion used in structural dynamics Use Multiple Excitations Select this button for activating the multiple excitation or the nonuniform input option To use this option the wave passage option should be also selected This option is applicable to a single continuous foundation or multiple foundations The nonuniform amplitude seismic input is introduced by a variable motion Fourier amplitude in the free field at different locations under foundation The multiple excitation or nonuniform input motion option could be applied in conjunction with motion incoherency and wave passage for creating a more realistic randomly spatially varying seismic ground motion environment WARNING For the nonuniform input case with a single foundation for the baseline code the foundation could be partitioned in up to 200 zones while for the fast solver can be partitioned in 2 000 zones each zone having a slightly different amplitude input Please note th
95. the current installed printers shown in the box You install printers and configure ports using the Windows Control Panel Properties Displays a dialog box where you can make additional choices about printing specific to the type of printer you have selected Paper Size Select the size of paper that the document is to be printed on Paper Source Some printers offer multiple trays for different paper sources Specify the tray here Orientation Choose Portrait or Landscape 6 2 3 Display File as Printed Select Print Preview from the File submenu Use this command to display the active file as it would appear when printed When you choose this command the main window will be replaced with a print preview window in which one or two pages will be displayed in their printed format The Print Preview tool bar offers you options to view either one or two pages at a time move back and forth through the document zoom in and out of pages and initiate a print job 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 63 ACS SASSI MAIN User Manual 64 ACS SASSI MAIN e2c2_analys out oj x lt 3 Model File Bun RunAll Options Window View Help 8 x ale 2j s Hel omelane rea e9 e i Nex e Tey Ra al Two Pa om In com Gul I EQUAKE Module Next Pag Prey Pag Two Page Zoom Z fj I SOIL Module a M LIQUEF Module I SITE Module i el D SASSI models sdb e2c2 Li Print Bring up the
96. the following DOS command is required SSI_module_name exe lt SSI_module_name inp where SSI_module_name could be SITE or POINT or ANALYS The SSI module executables are installed by default in the ACS_C directory on the hard drive and are also provided on the ACS SASSI installation DVD for the Batch run mode Each input file with the SSI_module_name and the extension inp contains only three input lines modelname modelname ext_input modelname_SSI_module_name out where ext_input is the extension provided by the ACS SASSI PREP AFWRITE command For the NQA version the V amp V runs are prepared to be run by the V amp V analyst in the batch mode The computed results in the batch mode are then compared using FCOMPARE routine with the reference files with SSI results from the interactive runs Comparison reports are automatically generated The 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 36 ACS SASSI MAIN User Manual 37 V amp V batch run file also provides detailed examples on how to build efficiently SSI analysis batch run files Because of the modular configuration of the ACS SASSI code has significant advantages for performing efficient SSI reanalysis or restart analysis It should be noted that for the standard solver version the SSI reanalysis implies that the solution database files FILE5 and FILE6 with extensions n5 and n6m are saved FILE5 is always saved and it is useful for
97. the problem solution for the required frequency steps The input file has extension anl and it is created by the ACS SASSI PREP AFWRITE command FILE1 FILE3 and FILE4 are always required as input files For the external load cases FILE and for incoherence analysis FILE77 are also required as input ANALYS performs the following computational steps Forms the flexibility matrix for the discretized model Computes the impedance matrix for the discretized model Determines seismic load vector including incoherency effects Solves the equation system for each frequency step and obtains transfer functions for each degree of freedom T The solution output computed by the ANALYS module contains the complex transfer functions which depending on the option required are from the control motion to the final motions or from external loads to total displacements In either case the SSI TF results are stored in FILE8 that is used by MOTION and STRESS for computing SSI responses For the baseline solver File5 and File6 that have the same name with the SSI model and the extensions n5 and n6 respectively are database files with large sizes These files are useful to be saved if repeated SSI reanalysis are needed for example for performing SSI reanalysis for Y and Z input directions after the SSI initiation analysis was performed or non linear SSI analysis option is used or if the incoherent SSI analysis is done using the stochastic simulation or t
98. the specified soil layer instruction MODL see section 5 3 26 Error 26 Property lt p gt Is not Defined e One of the model s BEAMS elements uses property lt p gt which is not defined e Check the elements for property indices or define property lt p gt instruction R see section 5 3 37 Error 27 Axial Area from Property lt p gt Is Illegal e The axial area from property lt p gt is less than or equal to 0 e Correct the area from the specified property instruction MODR see section 5 3 28 Error 28 Shear Area 2 from Property lt p gt Is Illegal e The shear area 2 from property lt p gt has a negative value e Correct the shear area 2 from the specified property instruction MODR see section 5 3 28 Error 29 Shear Area 3 from Property lt p gt Is Illegal e The shear area 3 from property lt p gt has a negative value e Correct the shear area 3 from the specified property instruction MODR see section 5 3 28 Error 30 Torsion Inertia Moment from Property lt p gt Is Illegal e The torsion inertia moment from property lt p gt has a negative or zero value e Correct the torsion inertia moment from the specified property instruction MODR see section 5 3 28 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 215 ACS SASSI PREP User Manual 216 Error 31 Flexural Inertia Moment 2 from Property lt p gt Is Illegal e The flexural inertia moment 2 from propert
99. then drag the mouse across the window The action the program will take is determined by which mouse button is pressed Left Mouse Button Rotate model around center of mass Middle Mouse Button Move model across screen Right Mouse Button Zoom in out on the model Also Keyboard Buttons have been enabled to give the user a more precise control of rotation Insert Delete Rotate around the X axis Home End Rotate around the Y axis 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 59 ACS SASSI PREP User Manual 60 Page Up Page Down Rotate around the Z axis You may change the drawing options using the following commands Options Window Settings see section 3 5 20 Options Colors see section 3 5 28 or Options Font see section 3 5 29 The Print command has been disabled for this window However if the user wants to print data in this window the use of the Export Image command is suggested see section 3 2 2 THANI File Extension Frame List Format The THANI format specifies the data that is to be loaded by PREP for the animation The file begins with the first line Start Frame End Frame and the Frame Stride The next line is the Directory name where all of the Data files for the animation Reside The rest of the File is a list of the frame file names with one file name per line Example Input 1101 Combined THD THD_00 000_00001 THD_00 005_ 00002 THD_00 010 0
100. to consist of one single wave type or several wave types The basic wave types are P waves and S waves which are also called body waves When these waves impinge on the ground surface or layer interfaces surface waves which include R waves and L waves may be generated P waves involve motions in the direction of wave propagation S waves involve motions perpendicular to the direction of wave propagation S wave motions in the vertical plane are called SV waves Horizontal S waves are called SH waves R waves involve horizontally propagating elliptical motions in the vertical plane and L waves consist of horizontal motions perpendicular to the horizontal direction of wave propagation With the above definitions ACS SASSI SITE sets up a coordinate system so that P waves SV waves and R waves involve particle displacements in the x z plane while SH waves and L waves involve particle displacements along the y axis Therefore the z axis is always vertical up x is in the vertical plane of wave propagation and y is perpendicular to x and z following the right hand rule 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 72 ACS SASSI PREP User Manual 73 Vertical Plane of Wave Propagation xX Horizontal Plane 9 Wa Figure 3 1 Wave propagation and associated parameters R Wave Select this page to set the R wave field options choose between No R Wave Field Shortest Wav
101. to wave propagation motion often called primary non linearity and ii Local non linearity includes the effect due to interaction called also secondary non linearity The latter one is confined to a limited region near the structure irregular zone and has only a minor influence on the motions of deeply embedded structures Thus considering only the primary non linearity i e the iteration on soil properties involved in equivalent linear method needs to be performed only for the free field analysis using SOIL module is sufficient The secondary soil non linearity effects in a limited region encompassing the basement of the structure can be considered by including an extended near field soil zone in the SSI model The soil strains within the irregular part of this zone can be computed by the program and the properties of the irregular zone can be changed iteratively according to equivalent linear procedure An automatic iterative procedure for the secondary non linearity has been implemented in ACS SASSI The baseline code could treat each iteration as a restart SSI analysis with New Structure that is about 2 to 5 times faster than the initial SSI analysis The secondary soil nonlinearity effects may be important for surface structures subjected to large earthquakes or for particular applications The secondary effects may also have some influence on the distribution of dynamic earth pressures on embedded foundation walls 19 Excavated So
102. will be drawn in the center of each element The text color for the group numbers can be changed by selecting the Options Colors command see section 3 5 23 4 4 20 Display Symbols for Boundary Conditions Select from the Plot tool bar Shortcut Keys Ctrl Shift B Use this command to show hide the symbols for boundary conditions ACS SASSI PREP displays the Boundary Conditions dialog box Boundary Conditions x mux M ROTX Mury F ROTY Cancel Select the direction s for which to show the symbols for boundary conditions from the UX UY UZ displacement ROTX ROTY ROTZ rotation check boxes To hide the symbols for the boundary conditions deselect all check boxes Note The displacement boundary conditions are shown with a simple arrow and the rotation boundary conditions are shown with a double arrow Change the symbol color for boundary conditions by selecting the Options Colors command see section 3 5 23 4 4 21 Display Symbols for Masses 4 Select from the Plot tool bar Shortcut Keys Ctrl Shift M Use this command to show hide the symbols for masses Masses can be shown with or without value as set by the Options Window Settings command see section 3 5 15 4 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 156 ACS SASSI PREP User Manual 157 The translational masses are shown with a simple arrow and the rotational masses are shown with a double arrow C
103. 00 and 250 for coherent analysis and between 250 to 500 for incoherent analysis The complex transfer functions for nodal acceleration and element stresses forces are then computed for all the Fourier frequencies up to cut off frequency by interpolation in the complex frequency domain ACS SASSI uses six smart interpolation schemes to compute transfer functions at the Fourier frequencies If a spectral peak is obtained close to the mid point of an interval defined by two consecutive frequencies it is recommended to include an additional frequency Therefore starting the analysis with fewer frequencies e g 80 is possible By then examining the ATF and adding new frequencies the significant SSI peaks can correctly be captured The ACS SASSI PREP module has an automatic algorithm in Batch menu option to compute the new required frequencies needed based on the identification of the ATF spectral peaks that are obtained by interpolation Also the TFU TFI plot capability that can be selected from the PREP menu to compare the computed ATF TFU extension files with the interpolated ATF TFI extension files 11 Computation of SSI Frequency Points NFREQ and Steps The transfer functions are computed at discrete frequency points which are integer multipliers of the frequency step The total number of SSI analysis frequencies is 500 For general analysis the frequency step DF is calculated by DF 1 DT NFFT where the parameters DT and NFFT are the
104. 0003 THD_00 015 00004 THD_00 020_00005 THD_00 025 00006 THD_00 030_00007 THD_00 035_ 00008 THD_00 040_00009 THD_00 045_ 00010 THD_00 055 00012 THD_00 060_00013 THD_00 065_ 00014 THD_00 070_00015 This input will animate the displacements for the first 15 time steps Frame Data Format The Frame Data format the same Data format for the Bubble plot see section 1 4 9 The headed consists of number of nodes in the file and a default scale factor The rest of the file is a node list with node number and X Y Z components 3 5 OPTIONS SUBMENU 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 60 ACS SASSI PREP User Manual 61 ACS SASSI Prep Model File Batch Plot Melis Window View Help Check Window Settings Colors 3 Output Font f o active databa Change model options 3 5 1 Set the Model Options Select Model from the Options submenu Use this command to set the model options ACS SASSI PREP displays the Model Options dialog box Model Options x Incompatible Modes General Elements Mass Matrix C Weight Matrix MV Overwrite Masses V Overwrite Forces The following options allow you to specify the model options Incompatible Modes Select the incompatible modes for the solid elements choose between nclude and Suppress This option applies to all solid elements from the active model Nine incompatible displacement modes are included in the formation of a stif
105. 014 by Ghiocel Predictive Technologies Inc 75 ACS SASSI MAIN User Manual 76 Run Modules M EQUAKE Cancel Help POINT HOUSE FORCE P ANALYS r COMBIN F MOTION STRESS RELDISP Number of Runs 1 Use this command to set the ACS SASSI modules to be run automatically the check boxes from the Run Modules dialog box allow you to enable disable ACS SASSI modules for automatic running procedures If you wish to use the automatic running option in a loop set the number of loops in the Number of Runs edit box This SSI module loop running option is used typically in conjunction with nonlinear SSI analysis capability to perform equivalent linear iteration on near field soil properties The number of runs is the number of iterations Start the automatic running procedure of the selected modules using the Run All Start command see section 6 4 2 page 76 To stop the automatic running procedure use the Run All Stop command see section 6 4 3 page 76 6 4 2 Start Running the Selected Modules Select Start from the Run All submenu Shortcuts Tool bar 6 Keys Ctrl S Use this command start the automatic running procedure of the selected modules see Run All Options command section 6 4 1 page 75 To stop the automatic running procedure use the Run All Stop command see section 6 4 3 page 76 6 4 3 Stop Running the Selected Modules 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive T
106. 1 ACS SASSI MAIN User Manual 22 C Ci i X C ar Xy C U X U X U A Ci X i C X wy 0 U X U i X U a C 0 C U 0 S1 SS S from which the final total motions of the structure can be determined In these equations the subscripts s i and w refer to degrees of freedom associated with the nodes on superstructure basement and excavated soil respectively C is the dynamic stiffness matrix defined by C K M where M and K are the total mass and complex stiffness matrices respectively u is the vector of complex nodal point displacement X is a frequency dependent matrix representing the dynamic boundary of the foundation at the interaction nodes The X is referred to as the impedance matrix Note For the Fl methods the equations of motion of the internal nodes of the excavated soil are eliminated from the SSI solution The FV method retains the equations of motions of the nodes of the excavated soil An alternate method to FV and FI is the Skin Method that condenses the internal volume nodes to reduce the size of foundation impedance matrix However this method is more approximate than FI and brings no benefits in terms of speed The Skin Method should be not used for nuclear applications According to the complex frequency domain formulation the solution of the linear SSI problem reduces to three main steps for each frequency 1 Solve the site response problem to determine the free field motio
107. 2 Proceedings Division V San Francisco California August 18 23 Ghiocel D M Todorovski L Fuyama H and Mitsuzawa D Seismic Incoherent Soil Structure Analysis of A Reactor Building Complex on A Rock Site 2011a SMIRT21 Proceedings Division V Paper 825 New Delhi India November 6 11 Ghiocel D M Lee 2011b Seismic Soil Structure Interaction SSI Effects for Large Size Surface and Embedded Nuclear Facility Structures 2011 World Congress on Advances in Structural Engineering and Mechanics ASEM11 Seoul Korea September 18 22 Ghiocel D M 2010a Some Insights and Brief Guidance for Application of Subtraction Flexible Interface Method to Seismic SSI Analysis of Embedded Nuclear Facilities GP Tech Technical Investigation Report GP Technologies Rochester NY GPT TIR 01 0930 2010 September 30 Ghiocel D M Todorovski L Fuyama H 2010b Seismic SSI Response of Reactor Building Structures Proceedings of the OECD NEA IAEA SSI Workshop Ottawa October 6 8 2010 Ghiocel D M Short S and Hardy G 2010c Seismic Motion Incoherency Effects for Nuclear Complex Structures On Different Soil Site Conditions Proceedings of the OECD NEA IAEA SSI Workshop Ottawa October 6 8 8 References Copyright 2014 by Ghiocel Predictive Technologies Inc 85 ACS SASSI MAIN User Manual 86 12 13 14 15 16 17 18 19 20 21 22 23 Ghiocel D M L
108. 2c2 mat ja e2c2 elm ja e2c2 nod ja e2c2 e0p ja e2c2 nop ia e2c2 frq ja e2c2 prp 5 e2c2 a e2c2 scp File name Files of type Cancel The following options allow you to specify which file to open File Name Type or select the filename you want to open This box lists files with the extension you select in the List Files of Type box List Files of Type Select the type of file you want to open Output files out All files Drives Select the drive for the file that you want to open Directories Select the directory for the file that you want to open Network File Access Choose this button to connect to a network location assigning it a new drive letter 6 2 2 Select Printer Select Print Setup from the File submenu Use this command to select a printer and a printer connection This command presents a Print Setup dialog box where you specify the printer and its connection 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 62 ACS SASSI MAIN User Manual 63 Print Setup HEI Printer Name HP Lasenet 5L Properties Status Default printer Ready Type HP LaserJet 5L Where LPT1 Comment Paper Orientation Size Letter 8 x11 in Portrait Source Paper Input Bin C Landscape Cancel Printer Select the printer you want to use Choose the Default Printer or choose the Specific Printer option and select one of
109. 4 U S Army Engineer Waterways Experimental Station Vicksburg Missisippi September 8 References Copyright 2014 by Ghiocel Predictive Technologies Inc 89 ACS SASSI PREP NQA Version 3 0 Including Options A AA and FS An Advanced Computational Software for 3D Dynamic Analysis Including Soil Structure Interaction ACS SASSI PREP User Manual 1 Table of Contents 1 2 3 INNS PRODUC TION A E ect tude cate Geet viie tas uel os hese abuts E ch Sabie ee eeciiss ak aubarea re cas 8 1 1 DESCRIPTION OF ACS SASSI CAPABILITIES 2 20 a2aaieineieeiieaiaeeeiadeee te 9 1 2 SPECIFIC SSI MODEL SIZE RESTRICTIONS 00 ee eeeeceeeeeeeee terete teeeeeeeeeeeeeeeeeeees 13 1 3 MODULAR STRUCTURE CONFIGURATION 00 0 2 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaea 14 1 4 FINITE EPEMENT LIBRARY tesvcwisiante doi vcien ears ea bhersend eine iret rime 16 eye UAT REIN PT a cess a eile aac ni os else es uate eh enue ube oh ANAE ues uh AAEE E AE T ASTAN 16 16 DATA CHECKIN G aea ener eer nee ne err rn ere rer een oe 17 GETING STARTED ariiraa eea e n aa e eneee enia 18 MENU COMMA N D S a iota Ae aA aA A ET 21 3 1 MODEL SUBMENU ee edini aeiiaaie aaiae aa eai ea eo iea aea a aaa aaia 24 3 1 1 Create a NEWMOGel is aici teen aaa ea at atten tah ete ds 24 3 1 2 Open an Existing MOG ae eae i eile ee a eet 25 3 1 3 Open an Input US ao aca sect east cee cee Goss ees Gated Grave eas Geeeces Gee eeesnceial aaran 26 3 1 4Open Close an Outp
110. 4 by Ghiocel Predictive Technologies Inc 221 ACS SASSI PREP User Manual 222 e The output time history step has a negative value e Correct output time history step by selecting the Options Analysis command see section 3 5 3 Error 68 Illegal Total Duration To Be Plotted e The total duration to be plotted has a negative value e Correct total duration to be plotted by selecting the Options Analysis command see section 3 5 3 Error 69 Illegal First Frequency for RS Analysis e The first frequency for RS analysis has a negative value e Correct first frequency for RS analysis by selecting the Options Analysis command see section 3 5 3 Error 70 Illegal Last Frequency for RS Analysis e The last frequency for RS analysis has a negative value e Correct last frequency for RS analysis by selecting the Options Analysis command see section 3 5 3 Error 71 Illegal Number of Frequency Steps For RS Analysis e The number of frequency steps for RS analysis has a negative value e Correct number of frequency steps for RS analysis by selecting the Options Analysis command see section 3 5 3 Error 72 Illegal Damping Ratio For RS Analysis e One of the damping ratios from the damping ratio list has a value that is not between 0 and 1 e Correct damping ratio for RS analysis by selecting the Options Analysis command see section 3 5 3 Error 73 Acceleration Time History File Does Not Exist 6 ERRORS AND W
111. 468 0 10359 1 03872 0 25992 2 0 33023 0 38077 0 49889 0 08123 0 41770 0 15688 3 0 53114 0 43295 0 65837 0 08003 0 33819 0 07529 4 0 54051 0 49153 0 96988 0 14669 1 12478 0 26478 5 0 22013 0 31832 0 54288 0 15972 1 58830 0 29268 If the STRESS post processing restart option is used then additional text files for post 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 34 ACS SASSI MAIN User Manual 35 processing are generated in the NSTRESS subdirectory These frame files are used by the ACS SASSI PREP module to create structural node stress contour plots static for a selected time or for maximum stress values or animated The STRESS post processing handles only SOLID and SHELL elements for 3D SSI models If the SSI model contains both SOLID and SHELL elements the frames include only average node stresses for the membrane stresses For the SHELL elements only separate frames are generated for the average node bending stresses the file extension include letters bd from bending See Table 2 for more details on frame text files If the SSI model includes near field soil elements that are adjacent to the foundation walls then the soil pressure frames can be generated The soil pressure frames are saved in SOILPRES subdirectory In addition to the seismic soil pressures frames at each time step a single frame with maximum soil pressures is also generated The user can also create total soil pressure fr
112. 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 162 ACS SASSI PREP User Manual 163 5 1 5 Define Spectral Amplification Ratios for ACS SASSI HOUSE Module AMP lt no gt lt al1 gt lt a2 gt lt a3 gt lt a4 gt lt a5 gt lt ab gt lt a gt lt a8 gt lt a9 gt lt a10 gt adds non zero parameters to spectral amplification ratio list of input motion lt no gt for the multiple excitation option ACS SASSI HOUSE module or deletes spectral amplification ratios if lt d1 gt is zero Note This instruction is provided for input files To change spectral amplification ratios from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 3 5 1 6 Define Analysis Options for ACS SASSI ANALYS Module ANALYS lt opmode gt lt type gt lt mode gt lt save gt lt prnt gt lt fopt gt lt ang gt lt XC gt lt yC gt lt ZC gt lt impe gt defines the following analysis options for ACS SASSI ANALYS module lt opmode gt operation mode 0 complete solution 1 data check only lt type gt analysis type 0 seismic 1 foundation vibration lt mode gt analysis mode 0 initiation 1 new structure 2 new seismic environment 3 new dynamic loading lt save gt file save option 0 do not save Files 6 1 save Files 6 lt prnt gt print option for transfer functions 0 do not print 1 print lt fopt gt frequency option 0 take
113. 92 ACS SASSI PREP User Manual 93 amplitude of the applied load and the maximum reference amplitude Fmax Rmax Analysis Options m EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Operation Mode Solution C Data Check Acceleration of Gravity 32 2 Frequency Step fo Time Step of Control Motion 0 005 Nr of Fourier Components o Frequency Set Number Poo 3 5 10 Set the Analysis Options for the ACS SASSI ANALYS Module The ANALYS module is the heart of the ACS SASSI code This module solves the dynamic problem This module also controls the restart modes of the ACS SASSI system ACS SASSI ANALYS has four different running modes the first mode is the initiation mode and the other three are the restart modes Mode 1 Initiation This is the first mode to be executed for a new problem In this mode ACS SASSI ANALYS basically reads the three input files File1 or File9 File3 and File4 and generates the database restart files and the FILE8 which contains the the absolute acceleration complex transfer functions computed for the specified SSI frequencies up to the cut off frequency It should be noted that the control motion defined by the user in the Analysis Options SITE 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 93 ACS SASSI PREP User Manual 94 dialog box see section 3 5 6 for seismic problems is in th
114. AIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module ANALYS in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI ANALYS is correct see Options Directories command section 6 5 1 page 77 6 3 12 Run the ACS SASSI COMBIN Module Select COMBIN from the Run submenu Shortcuts Tool bar ki Keys Shift F4 Use this command to run the ACS SASSI COMBIN module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 72 ACS SASSI MAIN User Manual 73 are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI COMBIN will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI COMBIN will prompt for the input and output files In this case all files generated by ACS SASSI COMBIN will be placed in the directory of the ACS SASSI COMBIN module While ACS SASSI COMBIN is running ACS SASSI MAIN sets the corresponding check box from the Status Panel se
115. ANSYS FE structural models with detailed meshes eventually including enhanced element types non linear material and plasticity effects contact and gap elements and ii compute seismic soil pressure on basement walls and slabs including soil material plasticity foundation soil separation and sliding using refined ANSYS FE soil deposit models OPTION Advanced ANSYS or AA The Option AA ACS SASSI ANSYS integration capability consists of using directly an ANSYS structural model for SSI analysis without the need for converting the structural model to ACS SASSI The ANSYS structural stiffness mass and damping matrices from ANSYS are used directly by ACS SASSI for the seismic SSI analysis Relative displacements absolute accelerations and response spectra can be fully computed in ACS SASSI For computing structural stresses the Option A should be used to transfer the SSI response motions at all time steps or selected critical steps as boundary conditions for ANSYS superstructure model Automatic commands are used to transfer the data from the ACS SASSI result database to the ANSYS input files The ACS SASSI ANSYS interface modules the LOADGEN and SUBMODELER that are used in Options A and AA are described in a separate manuals called ACS SASSI MAIN Integration Capability OPTION Fast Solver or FS The fast solver capability includes new SSI modules for the HOUSEFS and ANALYSFS modules that replace the baseline software HOUSE and ANA
116. ARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 222 ACS SASSI PREP User Manual 223 e The acceleration time history file does not exist or is misspelled e Correct the acceleration time history file by selecting the Options Analysis command see section 3 5 3 Error 74 Illegal First Record Number e The first record number for the acceleration time history file has a negative value or is greater than the number of records in the file e Correct the first record number by selecting the Options Analysis command see section 3 5 3 Error 75 Illegal Last Record Number e The last record number for the acceleration time history file has a negative value e Correct the last record number by selecting the Options Analysis command see section 3 5 3 Error 76 First Record Number Larger Than Last Record Number e The first record number for the acceleration time history file is larger than the last record number e Correct the record numbers by selecting the Options Analysis command see section 3 5 3 Error 77 Multiplication Factor and Maximum Value Of Time History Are Both Zero e The multiplication factor and maximum value used to scale the acceleration time history file are both zero e Correct the multiplication factor or maximum value by selecting the Options Analysis command see section 3 5 3 Error 78 Multiplication Factor and Maximum Value Of Time History Are Both Non Zero e The multipli
117. CS SASSI PREP desktop use the Model New command see section 3 1 1 5 1 26 Add Nodal Output Request for ACS SASSI MOTION Module NOUT lt dir gt lt code1 gt lt code6 gt lt node list gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 171 ACS SASSI PREP User Manual 172 adds the nodal output request for ACS SASSI MOTION module for nodes belonging to lt node list gt The parameter lt dir gt specifies the direction 1 x 2 y 3 z 4 xx 5 yy 6 zz and lt code1 gt to lt code6 gt are the output options Note This instruction is provided for input files To change nodal output requests from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 27 Switch Output to File or Screen OUT lt filename gt switches output to file or screen If the lt filename gt parameter is missing output will be switched to screen The default path for lt filename gt is the active model s path Note This instruction is overridden by the Model Output command see section 3 1 4 page 26 5 1 28 Define Analysis Options for ACS SASSI POINT Module POINT lt opmode gt lt layer gt lt rad gt defines the following analysis options for ACS SASSI POINT module lt opmode gt operation mode 0 complete solution 1 data check only lt layer gt last layer number in near field zone lt rad gt radius of the central zone Note This instruction is p
118. CS SASSI PREP User Manual 220 Error 55 Illegal Sum of Wave Ratios at Frequency lt i gt e The sum of the wave ratios for selected wave types at frequency lt i gt is not 1 e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 56 Illegal Last Layer Number in Near Field Zone e The last layer number has a negative value e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 57 Illegal Radius of Central Zone e The radius of the central zone has a zero or negative value e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 58 Illegal Coherence Parameter e The coherence parameter must be greater than or equal to 0 1 e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 59 Illegal Mean Soil Shear Wave Velocity e The mean soil shear wave velocity is less than or equal to zero e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 60 Illegal Number of Mesh Points Embedment Level e The number of mesh points is negative or zero e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 220 ACS SASSI PREP User Manual 221 Error 61 No Forces Defined e Your mode
119. Delete Choose this button to delete the selected model Attention the files are actually deleted and cannot be recovered 3 1 3 Open an Input File Select Input from the Model submenu Shortcut Tool bar This command opens an Open File like dialog box to let you choose the input file and runs the NP instruction see section 5 1 20 page 169 3 1 4 Open Close an Output File 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 26 ACS SASSI PREP User Manual 27 Select Output from the Model submenu Shortcut Tool bar This command opens an Open File like dialog box to let you choose the output file and runs the OUT instruction see section 5 1 27 To close the output file re select this menu command 3 1 5 Open Specified Model Select 1 2 3 4 from the Model submenu Use the numbers and model names listed at the bottom of the Model menu to open the last four models you opened Choose the number that corresponds with the model you want to open 3 1 6 Exit ACS SASSI PREP Select Exit from the Model submenu Shortcuts Mouse Double click the application s Control menu button Keys Alt F4 Use this command to end your ACS SASSI PREP session You can also use the Close command on the application Control menu 3 2 FILE SUBMENU 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 27 ACS SASSI PREP User Manual 28 ACS SASSI Prep Model 26A
120. Direction Node J Moment 3 Direction Node J The forces and moments in beam elements are computed at the end and are reference in local beam axes Figure3 7 Local axes for BEAMS elements SHELL elements The available components are membrane forces and bending moments Force XX Direction Sy Force YY Direction Syy Force XY Direction Syy Moment XX Direction My Moment YY Direction Myy Moment ZZ Direction Myy The membrane forces and bending moments are computed in respect to the local 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 113 ACS SASSI PREP User Manual 114 element coordinate system The forces are in units of force length length F L L and the moments are in moment length FL L The location of the infinitesimal elements where the forces and moments are computed are shown in the following figure Infinitesimal element Figure3 8 Membrane forces and bending moments for infinitesimal domain in the SHELL element For a correct interpretation of the SHELL stress outputs please see in detail the illustration examples with SHELL models included in the verification manual These examples are done in comparison with the ANSYS V11 V12 code PLANE elements The available components are e Stress Strain XX Direction 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 114 ACS SASSI PREP User Manual 115 e Stress Strain ZZ Dire
121. E material soil layer index MSET section 5 3 24 page 197 element type ETYPE section 5 3 12 page 194 GENERAL matrix property index RSET section 5 3 38 page 202 Note All the elements in the system must be grouped separately according to their type Gaps in element numbering are not allowed Use the ECOMPA instruction to compress groups with element gaps It is possible to use more than one group for an element type For example all structural brick elements may be considered as one group and all excavated soil elements as another group 5 3 17 Set Group Title GTIT lt gr gt lt title gt sets the title of group lt gr gt active group if not otherwise specified to lt title gt 5 3 18 Define End Release Code in Node I of BEAMS Elements Kl lt e1 gt lt e2 gt lt inc gt lt k1 gt lt k2 gt lt k6 gt defines the end release code for the BEAMS node for the element set defined by lt e1 gt lt e2 gt default lt e1 gt and lt inc gt default 1 from the active group The active group must be of type BEAMS The six values lt k1 gt lt k6 gt correspond to the force components P1 P2 P3 M1 M2 M3 at the node and may take the values 1 and 0 only If one of the element end forces is known to be zero hinge or roller the corresponding digit should be set to 1 5 3 19 Define End Release Code in Node I of BEAMS Elements KJ lt e1 gt lt e2 gt lt inc gt lt k1 gt lt k2 gt lt k6 gt
122. E module lt accopt gt option for acceleration input files 0 use simulated uniform random phases 1 use seed record phases 2 no simulation Use external acceleration lt nrfreq gt number of frequencies in spectra files lt rand gt initial random number lt damp gt damping value lt dur gt total duration lt corr gt correlated spectra option 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 166 ACS SASSI PREP User Manual 167 0 disabled 1 enabled lt seeds gt number of random seeds per each simulated acceleration file acc lt tpsd gt option to use target PSD files 0 disabled 1 enabled Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQUAKE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 9 5 1 16 Define Analysis Options for ACS SASSI FORCE Module FORCE lt opmode gt defines the following analysis options for ACS SASSI FORCE module lt opmode gt _ operation mode 0 complete solution 1 data check only Note This instruction is provided for input files To set the analysis options for the ACS SASSI FORCE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 9 5 1 17 Add Delete Frequency Numbers to from Frequency Set FREQ lt ndx gt lt f1 gt lt f2 gt lt f3 gt lt f4 gt lt f5 gt l
123. EE SEE 205 547 Define a Moment rrenan a a ra r araa 206 5 4 8 Delete MOM MS ocatcek coca eek vineiek te acteheeneheeh kent ed ened iek vin stdec teat ine ctrateek sees 206 5 4 9 LISKIMOMGING i212 sn aati aattat int tae da aad deed at han naadtanl cat tae haabtel Naetd ed eat heeled eo nenn 206 5 4 10 Modify a MONG ssc cepts eetcacaeeitaieen lected tale kaneis den eente ieee nved ones 206 5 4 11 Deline a Rotational MASS xieciscucers ceric recaryaciyesriatieestnanivesesiiainias i aceeuatanis 207 5 4 12 Read Moments from File ccixcsudecceencecceng eae eacetle dee ateusd waded vacate dewediedete actinceter 207 5 4 13 Generate Rotational Masses by Translation cccccccceeeeeeeeeeeeeeeeeeeeeeeeeeees 207 5 4 14 Delete Rotational Masses wis sictchcec eax carteadiceebicoduny sd comp iitieap habeeeyeahdend sti eines 207 5 4 15 Modify a Rotational Mass icc icccctacivet aden deat adied a eateeatinnincielantians 207 Copyright 2014 by Ghiocel Predictive Technologies Inc 6 ACS SASSI PREP User Manual 7 5 4 16 Scale Rotational MaSSe S cccecccecccceeccceeeceeeeeseeeeeceseeeeeeuueeeeeueeeueeesueeesanenees 208 JA IZ Sede e MOE S a a aaa a a tense ea aeiee L 208 5 4 18 Define a Translational MaSS eeeeeeeneeneenneennnnrnnerrinrrnnenrenrinnrrrnnrrnnerrenrnee 208 5 4 19 Delete Translational MASSES c ccccccccceeccseecececeeeeeeseueueeseeesesueeeeeueeeeueaeeeueess 208 5 4 20 Generate Translational Masses by Tran
124. Generation of three component input acceleration time histories compatible with a given design ground response spectrum with or without time varying correlation between the components The user has also the option to generate acceleration histories using the complex Fourier phasing of selected acceleration records called seed records in the ASCE 04 2014 Standard The software provides baseline correction and computes PSD and peak ground accelerations velocities and displacements to be used by the analyst to check the US NRC SRP 3 7 1 requirements for the simulated accelerations ii Evaluation of the seismic motion incoherency and wave passage effects ACS SASSI Version 3 0 includes state of the art modeling including both isotropic radial and anisotropic 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 9 ACS SASSI PREP User Manual 10 directional incoherency models Both stochastic and deterministic incoherent SSI approaches could be employed for simple stick models with rigid basemats These incoherent SSI approaches were validated by EPRI Short et Al 2006 2007 for stick models with rigid basemats and accepted by US NRC ISG 01 May 2008 for application to the new NPP seismic analysis ACS SASSI includes six incoherent SSI approaches namely two simplified deterministic approaches that are the AS and SRSS approaches benchmarked by EPRI Short et al 2007 three other alternate deterministic appr
125. Histories on File15 Set this option if you want STRESS to save the stress time histories on File15 This save option should be used with the next save option Save Transfer Functions Set this option if you want STRESS to output transfer functions in TFU and TFI files In addition transfer functions uninterpolated for element stress forces are also written in the formated File1 4 Skip Time History Steps Type the number of steps to be skipped for the output time history Phase Adjustment This parameter is defined in the same way as for the MOTION input see previous section There is no literature publication in the support of using or not the phase adjustment If no phase adjustment is selected for the stochastic simulation approach then this approach corresponds exactly to a Monte Carlo simulation approach to SSI analysis see ACS SASSI MAIN manual Section 1 5 1 for more details and Verification Manual Problem 35 Interpolation Option To improve accuracy of the stress transfer function STF computation several complex frequency interpolation schemes can be used same used in MOTION 0 SASSI2000 dense overlapping windows weighted averaging 1 Original SASSI 1982 non overlapping windows no averaging 2 New dense overlapping windows averaging 3 New only three overlapping windows averaging 4 New non overlapping windows with reduced shift no averaging 5 New non overlapping windows with large shift
126. ILE79 before the ANALYS module is run For external force vibration analysis the user should type an one digit number from 2 to 9 to input multiple load cases from 2 to 9 load external force cases To use multiple external force cases up to 9 load cases in a single ANALYS run the FORCE module should be run before ANALYS for all considered load cases and generate the FILE91 FILE92 FILE93 up to FILE99 For the external force analysis ANALYSFS produces the FILE8 files named FILE81 FILE82 FILE83 up to FILE89 depending on the number of load cases 3 5 11 Set the Analysis Options for the ACS SASSI MOTION Module The main function of the ACS SASSI MOTION module is to SSI response in terms of motion time histories acceleration transfer functions or in structure response spectra For seismic problems the ACS SASSI MOTION module reads the acceleration time history of the control motion from the input file and transforms it to the frequency domain using the Fast Fourier Transform technique It then reads the computed transfer functions from FILE8 for selected output points performs the interpolation and the convolution with the control motion and 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 99 ACS SASSI PREP User Manual 100 returns to the time domain using the inverse Fast Fourier Transform algorithm The resulting time histories of acceleration may be output directly or converted to output response spec
127. ION MOGUIG i cceiies screed ood Screed eee ececend Sovsel cae 73 6 3 14 Run the ACS SASSI STRESS Module cccccccceeeeeeeeeseeeeeeeeeeeeeeeeeeeeesaeaeeees 73 6 3 15 Run the ACS SASSI RELDISP Module cccccccceceeeeseceeecceeeeeeeeeeeeeeeeeeeeeeeeees 74 6 3 16 Run the ACS SASSI ANSYS Interfacing MOdules cceeeceeseseeeeeeeeeeeeeeeeee 74 6 3 17 Run the ACS SASSI BATCH a sole nen clei tcesuoecconioe csv cueditenes tae auraceaedee marae 74 6 4 RUNALESUBMENU ran a Coase es sces ang a sear cups saute EREE 75 6 4 1 Set the Modules to Be Run Automatically cccccccccccccceeceeeeeeeeeeeeesetnneeeeeeeeeees 75 6 4 2 Start Running the Selected MOdUIeS cceeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaeeeeeeeeeeeeeeees 76 6 4 3 Stop Running the Selected MOdules ccceeeeeeeeeeeeeeeeeeeeeeeeeteeeneeeeeeeeeeeeees 76 6 5 OPTIONS SUBMENU anea este seceded anana taani a e A EEE EA E EA AEEA EEREN Ea 77 6 5 1 Set Directories for ACS SASSI SITE Modules cccccccceeeeeeeesseeeeeeeeeeeeeeeeeeees 77 6 5 2 Set Input and Output Files for ACS SASSI Modules ccccccceceeeeeeeeeeeeeeeeeeeeees 78 6 5 3 Change Font for the Active WindOW cccceeeeeeeeeeeeceeeeeeeeeeeeeeeeeeaeeaeeeeeeeeeees 79 6 6 WINDOW SUBMENU wis ccdsitsicstacpeataneteniaeiasinaciaaianig arent nc aoeiend ane ane ponent as 80 6 6 1 Arrange Windows Side by Side Horizontal c ccccceceeeeeeeeeeceeeeeeee
128. IST lt n1 gt lt n2 gt lt inc gt lists the translational and rotational masses of the nodes between lt n1 gt and lt n2 gt with step lt inc gt default 1 If no parameters are specified all masses will be listed 5 4 22 Modify a Translational Mass MTMOD lt n gt lt mx gt lt my gt lt mz gt modifies the translational masses of node lt n gt for non zero values of lt mx gt lt my gt lt mz gt This instruction works as the NMOD instruction from the Node Instructions group see section 5 2 15 with the difference that translational masses are modified 5 4 23 Scale Translational Masses MTSCALE lt n1 gt lt n2 gt lt inc gt lt sx gt lt sy gt lt sz gt scales the translational masses belonging to the node set defined by lt n1 gt to lt n2 gt with step lt inc gt with the scaling factors lt sx gt lt sy gt lt Sz gt If one scaling factor has the value 0 0 it will be set to 1 0 If lt ni gt and lt n2 gt are not specified they will be set to the last 2 defined nodal translational masses The default value for lt inc gt is 1 This instruction works similarily to the NSCALE instruction from the Node Instructions group see section 5 2 17 with the difference that translational masses are modified 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 209 ACS SASSI PREP User Manual 210 5 4 24 Set Units for Translational and Rotational M
129. Inc 36 ACS SASSI PREP User Manual 37 POINT3 HOUSE and ANALYS modules in the proper order for a coherent analysis Eak File Edit view Favorites Tools Help ay Q Back P pj a Search i Folders i Address C Test Bellnssold Set5 x Go File and Folder Tasks 9 Make a new folder E Publish this folder to the Web E3 Share this folder Other Places gt Bellnssold My Documents Shared Documents i My Computer My Network Places Details Set5 File Folder ja BellNssOld hou E BellNssOld poi fea BellNssOld sit E BellINssOld_X anl E BellINssOld_X err ja BellNssOld_X hou E BellNssOld_X poi E BellNssOld_X sit E BellNssOld_ anl E BellINssOld_Y err ja BellNssOld_ hou E BellNssOld_ poi E BellNssOld_ sit E BellINssOld_Z anl E BellINssOld_Z err lia BellINssOld_Z hou E BellINssOld_Z poi E BellNssOld_Z sit Type ANL File ERR File HOU File POI File SIT File ANL File ERR File HOU File POI File SIT File ANL File ERR File HOU File POI File SIT File ANL File ERR File HOU File POI File SIT File Date Modified Monday fSrunbatch bat MS DOS Batch File August 22 2011 2 39 PM aia Set Directory If the user has multiple PCs with ASC SASSI software installed with the same directory structure for the batch modules The user can port a set directory as described in the above Windows Explorer window to the other PCs an run the batch files on those syst
130. Incoherence Analysis Options for ACS SASSI HOUSE Module INCOH lt gammax gt lt gammay gt lt vs gt lt ngp gt lt ipr gt lt nmodes gt lt met gt lt HSeed gt lt VSeed gt lt RandPhz gt defines the following incoherence analysis options for ACS SASSI HOUSE module lt gammax gt _ coherence parameter for x direction lt gammay gt coherence parameter for y direction lt vs gt mean soil shear wave velocity lt ngp gt number of mesh points per each embedment level lt ipr gt print code for coherence functions 0 no print 1 print lt nmodes gt lt met gt flag for use of metric units for the Abrahamson coherency models 0 standard 1 metric Hseed horizontal seed 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 168 ACS SASSI PREP User Manual 169 Vseed vertical seed RandPhz random phase angle in degrees It should be always 180 degrees Note This instruction is provided for input files To set the incoherence analysis options for the ACS SASSI HOUSE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 8 5 1 20 Switch Input to File INP lt filename gt switches input to file lt filename gt When the input file reaches EOF input will be switched automatically to keyboard The default path for lt filename gt is the path of the active model Note This instruction is overridden by the Model Input com
131. LYS modules The fast solver option is highly recommended for larger size SSI models with up to 100 000 nodes and more than 2 500 interaction nodes For very small size SSI models the standard solver competes in speed with the fast solver The ACS SASSI fast solver modules HOUSEFS and ANALYSFS that are included in Option FS replace the standard solver modules HOUSE and ANALYS modules The replacement is accomplished by changing the paths for the two module executables in the ACS SASSI MAIN menu This user manual contains the basic information needed by the user to operate the ACS SASSI MAIN module ACS SASSI MAIN is a specialized module in the SSI analysis management The ACS SASSI MAIN module ensures automatic administration of all resources files directories and the interfaces between software modules Before discussing the use of ACS SASSI MAIN module in detail a brief review of the technical basis of the ACS SASSI code is presented in the next sections The key SSI capabilities and limitations of the code are described hereafter 1 1 DESCRIPTION OF ACS SASSI CAPABILITIES The ACS SASSI Version 3 0 SSI capabilities incorporate many advanced algorithms and specialized features In comparison with the standard SASSI methodology as implemented in the university SASSI2000 code the ACS SASSI incorporates many additional SSI capabilities and specialized features in addition to its much faster computational speed i Generation of
132. LYS modules have to be re executed c Change in dynamic loading MOTION restart If changes are made in dynamic loads applied directly on the structure only the program modules FORCE ANALYS and MOTION have to be re executed However if only the time history of dynamic loads is changed while the loading pattern is not changed only the program module MOTION has to be re executed Not applicable to the fast solver version For fast solver this restart is replaced by the New Environment restart that is valid for both seismic and external force analysis option d Change in structure or near field soil ANALYS restart option New Structure If changes are made in the structure or near field soil without changing the interaction nodes the HOUSE ANALYS and MOTION and STRESS modules have to be re executed For non linear SSI analysis iterations the STRESS module computes the effective soil shear modulus and damping in the near field soil elements and transmits to HOUSE the new iterated values through FILE74 e Change in seismic load vector in the LOADXxxx or LOADXYZxxx files 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 37 ACS SASSI MAIN User Manual 38 This restart option is a quite rare application case For this reason a flag is not introduced in the GUI input and must be done manually This restart is applicable to special cases with differential motion inputs applicable to deep
133. M HFILE C SSIv22 ELNS ACC IOUT 1 0 0 0 0 1 1 1 151 158 r 71 1 1 1 1 1 1 1 2 1 18 FREQ 1 1 10 20 30 40 50 60 80 100 120 FREQ 1 140 160 180 210 230 INPUT FILE REACHED EOF INPUT SWITCHED TO KEYBOARD For Help press F1 Assign materials and properties to the elements using the MSET and RSET instructions see sections 5 3 30 and 5 3 40 Check the assigned materials and properties in the Model Plot window by showing the elements in their material property color see sections 4 4 15 and 4 4 16 and comparing their color with the material property color shown when selecting the Options Colors command see section 3 5 23 Set the element integration order for SOLID elements using the E NT instruction see section 5 3 9 Define the nodal masses instructions MT and MR see sections 5 4 18 page 208and 5 4 11 and set the mass units option instruction MUNITS section 5 4 24 Check the masses by displaying them in the Model Plot window see section 4 4 21 Set the model options by selecting the Options Model command see section 3 5 1 Define the analysis frequency set instruction FREQ section 5 1 17 2 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 19 ACS SASSI PREP User Manual 20 Define the analysis options by selecting the Options Analysis menu command see sections 3 5 3 to 3 5 12 Run the AFWRITE instruction to write the analysis files for the selecte
134. MM section 5 1 45 Error 4 Nodes from Symmetry Line lt i gt Are Equal e The nodes from symmetry line lt i gt are the same or have the same coordinates e Redefine the nodes for the symmetry plane line instruction SYMM section 5 1 45 Error 5 Nodes from Symmetry Plane lt i gt Are Collinear e The nodes from symmetry plane lt i gt are collinear e Redefine the nodes for the symmetry plane line instruction SYMM section 5 1 45 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 211 ACS SASSI PREP User Manual 212 Error 6 Undefined Element lt e gt Group lt g gt e Your model has a gap in group lt g gt element lt e gt e Define element lt e gt from group lt g gt or compress the elements by using the ECOMPR instruction See section 5 3 6 Error 7 Element lt e gt from Group lt g gt Has Too Few Nodes e Element lt e gt from group lt g gt from your model has too few nodes compared with the nodes number of the group type e Define all nodes or change the group type See also GROUP instruction section 5 3 16 Error 8 Element lt e gt Group lt g gt Has 0 Length e This error occurs for two node elements which nodes are the same or have the same coordinates e Check both node numbers and the coordinates of both nodes Error 9 Nodes from Element lt e gt Group lt g gt Are Collinear e This error occurs for three node or four node elements in which t
135. MMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 56 ACS SASSI PREP User Manual 57 You may change the drawing options using the following commands Options Window Settings see section 3 5 20 Options Colors see section 3 5 28 or Options Font see section 3 5 29 The Print command has been disabled for this window However if the user wants to print data in this window the use of the Export Image command is suggested see section 3 2 2 CONTANI File Extension Frame List Format The CONTANI format specifies the data that is to be loaded by PREP for the animation The file begins with the first line Start Frame End Frame and the Frame Stride The next line is the Directory name where all of the Data files for the animation Reside The rest of the File is a list of the frame file names with one file name per line Input Example 151 AXDIR nstress stress 01 975 00396 sig stress 04 810 00963 sig stress 05 090 01019 sig stress 05 100 01021 sig stress 05 120 01025 sig This input will animate the five selected frames Frame Data Format The Frame Data format the same Data format for the Bubble plot see section 1 4 9 The headed consists of number of nodes in the file and a default scale factor The rest of the file is a node list with node number and X Y Z components 3 4 12 Open Deformed Shapes Plot Window Select Deformed Shapes from the Plot submenu Shortcuts none Use this command to open a
136. Manual 166 and of the shear strain damping curve to lt sd gt and lt d gt for the dynamic soil property lt label gt If the property does not exist ACS SASSI PREP will create it Note This instruction is provided for input files To change dynamic soil property data from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 12 5 1 13 Add Element Output Request for ACS SASSI STRESS Module EOUT lt code1 gt lt code12 gt lt group gt lt element list gt adds the element output request for ACS SASSI STRESS module for the elements from group lt group gt and belonging to lt element list gt The parameters lt code1 gt to lt code12 gt are the output options Note This instruction is provided for input files To change element output requests from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 12 5 1 14 Define Spectra Title for ACS SASSI EQUAKE Module EQTIT stitle gt sets the spectra title for ACS SASSI EQUAKE module to lt title gt Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQUAKE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 9 5 1 15 Define Analysis Options for ACS SASSI EQUAKE Module EQUAKE lt accopt gt lt nrfreq gt lt rand gt lt damp gt lt dur gt lt corr gt seeds gt tosd defines the following analysis options for ACS SASSI EQUAK
137. Model Check Analysis Window Settings Colors Font Select Plot Reset Plot Tile Horizontally Tile Vertically Cascade Arrange Icons Close Close All Check Errors Plot Info Tool Bars Status Bar Instruction Line 1 2 3 4 Help Topics About Opens a new Model Plot window Opens a new Model Node Plot window Opens a new Time History Plot window Opens a new Transfer Function Plot window Opens a new Soil Layer Plot window Opens a new Spectrum Plot window Opens a new mpedance Plot window Opens a new Soil Property Plot window Opens a Bubble Plot window Opens a Vector TF Plot window Opens a Static Contour Plot Opens an Animated Contour Plot window Opens a Deformed Shape window Sets the model options Sets the check options Sets the analysis options for the ACS SASSI modules Sets the options for the active window Sets the colors for the active window Changes the font of the active window Changes the selection for the active Model Plot window Resets the selection for the active Model Plot window Arranges windows in horizontal non overlapped tiles Arranges windows in vertical non overlapped tiles Arranges windows in an overlapped fashion Arranges icons of closed windows Closes the active window Closes all active windows Shows or hides the Check Errors window Shows or hides the Plot Info window Shows or hides the tool bars Shows or hides the status bar Shows or hides the nstruction Line
138. Module Number of soil layers 200 Number of half space layers 20 Number of analysis frequencies 500 POINT Module Number of soil layers 200 Number of half space layers 20 Number of analysis frequencies 500 Number of embedment layers 50 FORCE Module Number of analysis frequencies 500 HOUSE Module Number of nodes 99 999 Number of interaction nodes 99 999 Number of materials or cross section geometries 9 999 Number of analysis frequencies 500 Number of embedment layers 50 Number of multiple support foundation zones 200 for Standard Solver 2 000 for Fast Solver ANALYS Module Number of analysis frequencies 500 MOTION Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 Number of damping values for response spectra calculations 5 RELDISP Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 STRESS Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 Number of elements per group 5 000 for Standard Solver 10 000 for Fast Solver Number of element groups limitation only for post processing 500 for Standard Solver 5 000 for Fast Solver 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 10 ACS SASSI MAIN User Manual 11 1 3 MODULAR STRUCTURE CONFIGURATION The main configuration
139. NG The Skin Method was not V amp V ed in the NQA version and it is not recommended for nuclear projects 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 79 ACS SASSI PREP User Manual 80 Ae Ma SY es il Gaga cata agaaa masaa paasa paaaa 76 61 46 31 16 16 13 10 7 4 a Not so good numbering b Good numbering reer f Figure 3 4 Good and not so good node numbering The node numbering should should start from the bottom layer up to the surface layer The figure shown below illustrates two examples for node numbering Thus we recommend the bottom up node numbering as a standard convention for using ACS SASSI Using the bottom up node numbering starting with all interaction nodes is mandatory for multiple excitation input analysis option when the node numbering should be continuous for each foundation or zone For element numbering in ACS SASSI there is no special restriction in the element numbering for structures with no embedment The element numbering has to be in continuous sequence However for structures with embedment the element numbering of the SOLID elements used to define the excavation volume has to be based on a top bottom element numbering scheme from ground surface to baserock so that the far field soil layers associated with the layers of solid elements are assigned in an increasing order WARNING We recommend that excavation volume is modeled by a set of group
140. P window such as another tool bar button The Help topic will be shown for the item you clicked 4 2 INSTRUCTION HISTORY TOOL BAR amp nist To hide or display the tool bar choose the View Tool Bars command see section 3 7 3 Item Action Detailed Description Runs the instruction from section 4 2 1 the Instruction History List nlist 1 1 Instruction History List section 4 2 2 keeps track of previously run instructions 4 2 1 Run instruction from the Instruction History 4 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 145 ACS SASSI PREP User Manual 146 Select from the Instruction History tool bar This command runs the instruction currently selected in the nstruction History list see section 4 2 2 4 2 2 Select Instruction from the Instruction History nlist 1 1 This list box contains the last 10 instructions run from the Instruction Line see section 3 7 5 or from the dialog boxes generates by the Instruction Wizard see section 4 3 1 To re run an old instruction select the instruction from this list and click the Run History Instruction button see section 4 2 1 4 3 INSTRUCTION LIST TOOL BAR To hide or display the tool bar choose the View Tool Bars command see section 3 7 3 Item Action Detailed Description Runs nstruction Wizard for section 4 3 1 selected instruction in the Instruction List AFWRITE Instruction List contai
141. R copy FILE8 jDIR FILE8_ j move out jDIR del Q 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 38 ACS SASSI PREP User Manual 39 cd rmdir work Combine bat File echo off set ipath set opath Combine_FILE8 mkdir opath cd opath for i in X Y Z do copy ipath Set1 iDIR FILE8 i FILE81 for j in 23 4 5 do copy A ipath Set_ j iDIR FILE8_ i FILE82 del FILE81 del FILE82 ren FILE8 FILE81 ren FILE81 FILE8_ i 3 4 PLOT SUBMENU 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 39 ACS SASSI PREP User Manual 40 x e Se S E a Mode Z X amp save v larwrrte gt Allat Time History PAE A ivman e mE Hele lile Soil Layers Spectrum Impedance Soil Property Bubble Plot Vector TF Plot Contour Plot Deformed Shape HTIT EL CENTRO ACCELEROGRAM HFILE C SSIv22 ELNS ACC ITT 1 4 4 1 151 168 4 3 4 1 Open a New Model Elements Plot Window Select Model from the Plot gt Elements submenu Shortcuts Tool bar Keys F5 Use this command to open a new window containing the Model Plot You may change the drawing options using the following commands Options Window Settings see section 3 5 15 Options Colors see section 3 5 21 Options Font see section 3 5 29 Options Plot Select see section 3 5 30 page 134 Options Plot R
142. REP User Manual 25 Model Path Type the model path If the path does not exist it will be created All of the model s files will be placed in this path Model Title Type the model title maximum 100 characters Database Type or select the model database previously created from ACS SASSI MAIN New Model Model Name OK KNSP Cancel Model Path C Test KNSP Help Model Title KNSP Database C Test DB T est sdb 3 1 2 Open an Existing Model Select Open from the Model submenu Shortcuts Tool bar Keys Ctrl O Use this command to open a model previously created using the Model New command see section 3 1 1 The model remains active until you select another one Models may be opened also by using the Model 1 2 3 4 command see section 3 1 5 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 25 ACS SASSI PREP User Manual 26 Open Model x DASASSIStestl sdb a ance Models Description er es NAME e2c2 __ Delete a mode PATH d sassike2c2 testi LE EAD FINITE ELEw NUMBER OF NODES 158 NUMBER OF GROUPS 3 nie The following options allow you to specify which model to open Database Type or select the model database previously created from ACS SASSI MAIN Models Select the model name from this list Description Shows a brief description of the currently selected model Open Choose this button to open the selected model
143. RSS or a weighted linear 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 46 ACS SASSI PREP User Manual 47 superposition Use the View menu to switch among the multiple open windows see View 1 2 command section 3 7 6 ACS SASSI Prep Response Spectrum File Test rs BAR URAR Fie Batch Plot Options Window view Help Dlas P SoS lal cs EE e awr FMOD Ale Rl Q z se fe Ss MIEJ nil For Help press F1 3 4 7 Open Impedance Plot Window Select Impedance from the Plot submenu Shortcuts none Use this command to open a mpedance Plot window and then select the Impedance file that you would like to plot on figure You may change the drawing options using the following commands Options Window Settings see section 3 5 18 Options Colors see section 3 5 25 or Options Font see section 3 5 29 3 4 8 Open a Soil Property Plot Window 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 47 ACS SASSI PREP User Manual 48 Select Soil Property from the Plot submenu Shortcuts Tool bar Al Keys F9 Use this command to open a new Soil Property Plot window Select the dynamic soil property from the Select Dynamic Soil Property dialog box Select Dynamic Soil Property x Sand Edt Cancel Delete Help Title Rock i i 1T The dyna
144. S Or cuna wend e Sa ares a E ena eae aa 20 2 1 FLEXIBLE VOLUME AND INTERFACE METHOD cceeeeeeeeeeeeeeeeeeeeeeeeeees 20 227 SITE RESPONSE ANALY SlSiaiatcande cxiaheckantiee anderen cienteusateeate R S 22 2 0 IMPEDANCEANALYSIS vasssstucescossvanscsavecacpeven a a ae 23 2 4 STRUCTURALANAEYSIS e e e E encvale Santensaiia 24 2 5 SUMMARY OF COMPUTATIONAL STEPG c ceeeeeeeeeeeeeeeeeeneeeeeeeeeeeteeeneeeneees 24 3 DESCRIPTION OF SSI MODULES 0c aa eee ne the cents lak 26 3 1 SEISMIC INPUT SITE RESPONSE AND SSI ANALYSIS MODULES 0 0 26 3 2 PERFORMING SSI ANALYSES AND REANALYSES 1 000 ce eeeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeees 36 A APPLICATION GUIDELINES csciceniocia til eeu sins ean e lesa ilen tags dena eadspiaiucaneilaneeds 39 4 1 SSI ANALYSIS PROCEDURE s cc sc npcesec sccbecensaueies vec teceedan erst visubectideuteawenenen mandevuae 39 4 1 1 Steps Involved in SSI AnalySiS 0 cece eeccceee eee e eee eeeeeecaaeeeeeeeeeeeeeeeccaaeeeeeeeee 39 4 1 2 Engineering COnside rallons 4 nt2 cnt ean etn oni ese ets 41 42 ACS SASS Lg S Deen onan rer RE en ne ne ee ee ene te Pe none eee 50 4 2 1 Initiation Seismic SSI Solution RUNS eee eeeceeccccee eee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaees 50 4 2 2s POS oO UMOM UNS a a a a a aa E ues 51 4 2 3 Restart SSI Solution RUNS 1 14 esn la tae eae oe ae emcee 51 4 2 4 New Structure or Near Field Soil Properties ceeeeeeeeeeeeeee
145. SI FORCE module 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 71 ACS SASSI MAIN User Manual 72 While ACS SASSI FORCE is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module FORCE in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI FORCE is correct see Options Directories command section 6 5 1 page 77 6 3 11 Run the ACS SASSI ANALYS Module Select ANALYS from the Run submenu Shortcuts Tool bar ta Keys Shift F3 Use this command to run the ACS SASSI ANALYS module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI ANALYS will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI ANALYS will prompt for the input and output files In this case all files generated by ACS SASSI ANALYS will be placed in the directory of the ACS SASSI ANALYS module While ACS SASSI ANALYS is running ACS SASSI M
146. SI interaction is large Thus the differential free field motions are highly constrained by the rigid basemat and because of this the rigid body foundation motion complexity is highly reduced in comparison with the complexity of the local motion spatial variations For flexible foundations the incoherency induced stochasticity of the basemat motion is driven by the local spatial variations of free field motion The flexible foundation motion has a less smoothed spatial variation pattern since kinematic SSI is reduced Thus the differential free field motions are less constrained by the basemat and because of this the flexible foundation motion complexity is similar to the complexity of the local motion spatial variations Based on a number of investigations done for incoherent SSI analyses of different nuclear islands we noticed that deterministic SSI approaches are usually limited to rigid foundation applications as demonstrated in the 2006 2007 EPRI studies Short et al 2006 2007 Ghiocel 2013b For flexible foundations the stochastic simulation approach is the recommended choice since it accurately captures the statistical nature of local free field motion spatial variations For 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 88 ACS SASSI PREP User Manual 89 flexible foundations the free field motion local spatial variations are directly transmitted to the flexible basemat motion Determinis
147. SI models It does not work for 2D models and 3D models with symmetry or antisymmetry conditions Copyright 2014 by Ghiocel Predictive Technologies Inc ACS SASSI MAIN NQA Version 3 0 Including Options A AA and FS An Advanced Computational Software for 3D Dynamic Analysis Including Soil Structure Interaction ACS SASSI MAIN User Manual 1 Table of Contents TAINTRODUGC TIO Nie scasrenisasonsca teh cad eaenem a a aat 4 1 1 DESCRIPTION OF ACS SASSI CAPABILITIES ccc ee eeeeseeeeeeeeeeeeeeeeteeseenneeeeees 5 1 2 SPECIFIC SSI MODEL SIZE RESTRICTIONS 2c cccnonek ounes 9 1 3 MODULAR STRUCTURE CONFIGURATION oh 2tesce Seca cats tances decane dora i taeet lve deere 11 14 FINITE ELEMENT PIBRA AY a A aA L En 12 1 5 MODELING CAPABILITIES AND LIMITATIONS ceeeeeeeceeecneeeeeeeeeeeeeeeeeneeeeeeeeees 12 1 5 1 Soil Layering Excavated Soil and Structural FE Modeling ceeeeeeeees 12 tS2 Dynamie OANA se sore Seta ce a eae eta cee ngs detec ra em megs ceed eae 17 1 5 3 Finite Element Library Description sssssssssssesssesseerrnnrrsssrttttrrrnrrrserrrtnrrnnnnnnneeetee 18 1 5 4 Soil Non Linear Hysteretic BehaviOl ccccececeeeeeseeecceeeeeeeeeeeeeeneaeeeeeeeeeeeeeaaae 18 1 5 5 SSI Solution Interpolation Scheme in Frequency ccceeeeeeeeeeeeeeeeetteeeeeeeeees 18 1 5 6 System of Parameter WIS sssce5 fiat ase hocs hai os Seagal ent oc eases Goaltenders 19 Ze TARORA ETICA BA
148. SSI modules which are to be executed to perform the initiation post process and restart analysis 4 1 SSI ANALYSIS PROCEDURE 4 1 1 Steps Involved in SSI Analysis The seismic SSI analysis involves the following preliminary steps Step 1 Select the time history of control motion and compute its response spectra to highlight the dominant frequencies contained in the input motion Assume the wave composition and or coherency characteristics of seismic motion Step 2 Determine the possible important frequency ranges of the soil structure interaction response by examining the dominant frequencies of the structures of the fixed base condition These frequencies can be obtained either by ACS SASSI using complex frequency approach or by another standard finite element program using modal analysis The ACS SASSI to ANSYS converter included in PREP module translates the SSI model is an ANSYS structural model by a single mouse click Based on the initial SSI analysis adjust the calculation frequencies by adding new frequencies Step 3 Based on the results of Steps 1 and 2 determine the cut off frequency of the SSI analysis Step 4 Based on the vertically propagating shear wave assumption specify the location of the control motion and compute the strain compatible free field soil properties Step 5 Based on the iterated soil properties obtained from the SOIL module analysis performed in Step 4 select the soil profile for the SSI analysis This
149. Save Stress Time Histories on File 15 IV Output Transfer Functions Phase Adjustment o Interpolation Option 2 Smoothing Option 0 Acceleration Time History Data Nr of Fourier Components 4096 Time Step of Control Motion 0 005 C Data Check Foundation Vibration Bement Output Data 4 w Components Force 1 Direction Node Force 2 Direction Node Force 3 Direction Node Moment 1 Direction Node EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE d Delete tet Force 1 Direction Node J Force 2 Direction Node J Force 3 Direction Node J C Moment 1 Direction Node J Frequency Set Number 1 Moment 2 Direction Node Moment 2 Direction Node J ae Moment 3 Direction Node Moment 3 Direction Node J Multiplication Factor 0 Component Request Max Value for Time History 0 1 C NoR First Record 0 Print Only Maximum Response Last Record 0 Print Maximum and Save Time History of Response Title RG160X File D ssi Demo_1 RG160X acc I File Contains Pairs Time Step Accel Post Processing Options MV Save Max Value Restart for Nodal Stress Contours JV Save Time History Restart for Soil Pressure Contours Frame Selection Lok cast He The program reads the acceleration displacement transfer functions from FILE8 and information about elements from File4 with n4 extension Then for each requested e
150. TRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 16 ACS SASSI MAIN User Manual 17 occur in different situations for example when the user wants to include the SSI soil nonlinear hysteretic behavior or to include the surrounding back fill soil in the FE model or to compute seismic pressures on basement walls and mats In these situations the use of overlapping meshes for the basement modeling is crucial for the FI FSIN and FI EVBN methods Note The FI methods could produce erroneous results if the basement mesh and excavation mesh is the same mesh The FV method is usually affected less significantly by the basement mesh modeling especially for stiff basements Based on our accumulated experience on SSI modeling we suggest avoiding including near field soil elements in the FE model as much as possible since this could increase significantly the run time on case by case basis it could be 1 2 to 3 times and in addition to this could create numerical problems especially if the FI FSIN method is used If near field soil elements are included in the FE model then we recommend as an accurate robust and efficient approach the use of the FI EVBN method with separated overlapping meshes for the modeling of the basement and the excavated soil 15 The structural mass matrix is assumed to be 50 lumped and 50 consistent except for the structural beam elements and plate elements where consistent mass matrix and lumped mass mat
151. U COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 111 ACS SASSI PREP User Manual 112 Stress Strain ZZ Direction Stress Strain XY Direction Stress Strain XZ Direction Stress Strain YZ Direction Octahedral Shear Stress The stresses in the 3D solid elements are computed at the centroid of the element and are referred to in global axes The stresses are shown in the following figure Figure 3 6 Stresses in SOLID elements In addition to the user requested response ACS SASSI MOTION may also output other components of the response if calculation of these components is necessary in order to determine the requested response For example in order to output maximum octahedral shear stress for 3D solid elements all six components of stress must be computed Therefore ACS SASSI MOTION also outputs the maximum response of these components However the corresponding time histories are not to be saved on FILE15 unless they are specifically requested by the user BEAMS elements The available components are e Force 1 Direction Node 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 112 ACS SASSI PREP User Manual 113 Force 2 Direction Node Force 3 Direction Node Moment 1 Direction Node Moment 2 Direction Node Moment 3 Direction Node Force 1 Direction Node J Force 2 Direction Node J Force 3 Direction Node J Moment 1 Direction Node J Moment 2
152. a linear analysis solution However approximate non linear SSI analysis can be performed by using an iterative scheme based on using the Seed lIdriss equivalent linear procedure implemented as a multi step SSI reanalysis 2 Both the primary non linear effects in free field and the secondary non linear effects in a limited region near the structure due to SSI effects can be considered automatically in ACS SASSI if near field soil elements are included in the basement FE model The primary or global nonlinearities can be handled in one step SSI analysis The secondary or local nonlinearities can be included only by performing repeated SSI reanalysis interactively or in batch mode The code handles these SSI reanalysis for considering local non linear soil behavior automatically Typically 1 to 3 additional SSI iterations reanalysis are sufficient for a good convergence for local soil non linearity effects 1 5 5 SSI Solution Interpolation Scheme in Frequency This code version include six efficient interpolation schemes for accurate approximation of the complex response transfer functions TF for both nodal acceleration TF and structural stress forces TF For complex structures the existence of many structural models could produce significant deviations in the interpolated TF obtained from the computed TF The deviations are produced by spurious narrow band spectral peaks and valleys in the interpolated TF In this cases additional 1
153. able for the fast solver code Each of the above modes involves only two computer runs as described below 4 2 4 New Structure or Near Field Soil Properties This restart mode performed for both the seismic and foundation vibration problems when the FE model is changed without modifying embedment nodes consists of the following two runs 1 HOUSE run 2 ANALYS run 3 STRESS for non linear SSI The new File4 n4 extension obtained from HOUSE run is used with the old FILE1 seismic analysis 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 51 ACS SASSI MAIN User Manual 52 or FILE9 foundation vibration analysis as input to ANALYS run that creates FILE8 This restart is also used for non linear SSI analysis via equivalent linear SSI iterations For non linear SSI HOUSE ANALYS and STRESS have to be run for each SSI iteration FILE74 and FILE78 are generated during SSI iterations 4 2 5 New Seismic Environment This restart mode performed only for seismic problems when the type of seismic input or its location is changed It consists of the following two runs 1 SITE run 2 HOUSE run only for incoherent stochastic simulation runs 3 ANALYS run restart for New Environment The new FILE1 obtained from SITE is used as input for ANALYS run ANALYS run then creates a new FILE8 HOUSE run is not needed for coherent inputs If the seismic motion incoherency is considered then HOUSE is
154. accurate acceleration transfer function ATF computation six complex frequency interpolation schemes can be selected 0 SASSI2000 dense overlapping windows weighted averaging 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 102 ACS SASSI PREP User Manual 103 1 Original SASSI 1982 non overlapping windows no averaging 2 Dense overlapping windows averaging 3 Only three overlapping windows averaging 4 Non overlapping windows with one position shift no averaging 5 Non overlapping windows with Iwo position shift no averaging 6 Cubic spline interpolation no windowing WARNING The spline interpolation option is recommended for performing incoherent SSI analysis since avoids any overshooting during the ATF interpolation process However before using the spline option for incoherent SSI analysis the user has to check that for coherent SSI analysis the number of selected frequencies is sufficiently large so that using the spline interpolation will not smooth or clip any significant ATF spectral peaks Phase Adjustment This option could be used for incoherent SSI analysis with the stochastic approach Simulation Mean in EPRI studies or the deterministic linear approach AS in EPRI studies is selected The phase adjustment option provides approximate upper bound solutions for incoherent SSI responses when only a single input time history is considered this is the most often situati
155. action the excavated soil dynamic degrees of freedom are reduced to the SSI nodes that are located only at the foundation soil interface For the FI EVBN method or Modified Subtraction in addition to the SSI interaction nodes defined at the foundation soil interface includes SSI interaction nodes defined at the ground surface of excavated soil The additional SSI interaction nodes placed at the ground surface of excavated soil improve significantly the SSI response accuracy These ground surface SSI interaction nodes are of key importance to capture accurately the seismic wave scattering effects that are produced by the scattered surface waves In addition to the FI methods the Fast FV method was recently introduced The FFV method improves the FI EVBN method accuracy by increasing the number of interaction nodes by adding new layers of interaction nodes that are internal nodes of excavated soil volume Ghiocel 2013a However the way in which the interaction nodes are selected from the internal excavated soil nodes should be on a case by case situation based on analyst s judgment and some preliminary sensitivity analysis The SSI problem matrix formulation is the same for the FV and FI methods except that the equations of motion of the excavated soil system are different depending on the selection of the SSI interaction nodes The SSI problem matrix equation is 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 2
156. ain help on some portion of ACS SASSI MAIN When you choose the tool bar Context Help button the mouse pointer will change to an arrow and question mark Then click somewhere in the ACS SASSI MAIN window such as another tool bar button The Help topic will be shown for the item you clicked Shortcuts Tool bar Keys Shift F1 6 8 2 View About Window Select About from the Help submenu Use this command to display the copyright notice and version number of your copy of ACS SASSI MAIN 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 83 ACS SASSI MAIN User Manual 84 7 TOOL BAR BUTTONS The tool bar contains buttons that give you quick mouse access to many commands and features of ACS SASSI MAIN Button Menu Command Detailed Description Model Open Model section 6 1 2 page 59 Model Close Model section 6 1 3 page 60 File Open section 6 2 1 page 61 File Print section 6 2 4 page 64 Run PREP section 6 3 1 page 66 Run EQUAKE section 6 3 3 page 68 Run SOIL section 6 3 4 page 68 Run LIQUEF section 6 3 5 page 69 NOT INCLUDED Run SITE section 6 3 6 page 69 Run POINT section 6 3 7 page 70 Run HOUSE section 6 3 8 page 70 Run PINT section 6 3 9 page 71 Run FORCE section 6 3 10 page 71 Run ANALYS section 6 3 11 page 72 Run COMBIN section 6 3 12 page 72 Run MOTION section 6 3 13 page 73 Run STRESS section 6 3 14 page 73 Run All Options secti
157. al plane this value is given in the following figure 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 75 ACS SASSI PREP User Manual 76 AA X KD 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 76 ACS SASSI PREP User Manual 77 Figure3 2 Definition of the radius Analysis Options E y E EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Operation Mode Solution Data Check Reveseseesesesonses Number of Embedment Soil Layers fo Point Load Central Zone Radius 13 8 For 3D SSI model excavation meshes an average value can be obtained for relatively uniform meshes Uniform meshes are recommended as much as possible For nonuniform meshes sensitivity studies are always recommended For 2D SSI excavation meshes the radius of the central zone shall be selected as follows 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 77 ACS SASSI PREP User Manual 78 6 h L eo Radius r h Figure 3 3 Definition of the radius for 2D meshes WARNING For nonuniform meshes sensitivity studies are recommended for different radius values estimated based on the excavated soil mesh sizes as minimum radius average radius and maximum radius values 3 5 8 Set the Analysis Options for the ACS SASSI HOUSE Module The ACS SASSI HOUSE module computes the frequency inde
158. all modular reactors SMRs The FFV method in addition to the interaction nodes defined at the outer surface of excavation volume includes interaction nodes defined by internal node layers within excavation volume The user 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 7 ACS SASSI MAIN User Manual 8 can automatically generate the interaction nodes for the FFV method The FFV method speeds up the SSI analysis of deeply embedded structures by tens of times faster than the traditional reference FM method vii Automatic selection of additional SSI calculation frequencies that are required to improve the accuracy of the interpolated TF that is applicable to both the node acceleration or displacement TFs and the element stress TFs This feature is an important practical capability especially for larger size FE model applications because it saves a lot of labor effort and also ensures a better quality of SSI analysis viii Visualization of complex TF variation patterns within the entire structural model for selected SSI calculation frequencies The complex TF patterns are visualized on the structure using colored vector plot animations including all three directional components red for X green for Y and blue for Z The TF amplitude is given by vector length and the TF phase is given by vector orientation This capability is extremely useful for checking the correctness of the FE modeling and understanding the
159. ally used in the Option AA WARNING The node numbering optimizer is highly effective for large size SSI models with significant embedment We strongly recommend the use of the node numbering optimizer for any larger size SSI model with embedment WARNING If the node numbering optimization is used then the correct node numbering is provided in the optimized model input file with extension hownew The user shall use the node numbering from hounew file to select the post processing node output requests for the MOTION and RELDISP modules The STRESS output element results are also reported based on the optimized model node numbering The following options allow you to specify the analysis options for ACS SASSI HOUSE module Operation Mode Select the operation mode from Solution and Data Check Dimension of Analysis Select the dimension of analysis It can be 2D or 3D since 1D is not available in this version Flexible Volume Methods Baseline HOUSE as shown in PREP Options Analysis HOUSE Select either the SSI substructuring method with the option of either 1 the Flexible Volume FV with the Direct Method and the Skin Method options or 2 the Flexible Interface Fl that is equivalent to the Subtraction or Modified Extended Subtraction method depending on the interaction nodes selection Fast Solver HOUSE as shown in SUBMODELER Options Analysis HOUSE Select the SSI substructuring method with the option of 1 the Flexible Volume FV
160. am Line Color Legend Text Color 3 5 26 Spectrum TFU TFI Impedance Plot Colors The following options allow you to customize the colors for the active Spectrum Plot window Spectrum Colors x Background Color Axes Color Cancel Text Color Help Color for Line 1 Color for Line 6 ml Color for Line 2 Color for Line 7 es Color for Line 8 Color for Line 9 E Color for Line 10 Color for Line 3 Color for Line 4 Color for Line 5 m m m mm m Background Color Select this button to change the background color Axes Color Select this button to change axes color Text Color Select this button to change the text color Color for Line 1 15 Select this button to change the color of the corresponding line 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 132 ACS SASSI PREP User Manual 133 3 5 27 Soil Property Plot Colors The following options allow you to customize the colors for the active Soil Property Plot window Background Color Select this button to change the background color Axes Color Select this button to change axes color Text Color Select this button to change the text color Color for Shear Modulus Line Select this button to change the color of the shear modulus shear strain curve Color for Damping Line Select this button to change the color of the damping ratio shear strain curve Soil Property Colors x Ba
161. ames including the static bearing pressures plus the computed seismic pressures The static pressure text file is named STATIC_SOIL_PRESSURES TXT and is generated when the soil pressure frames are requested The format of this file is the same as for the ELEMENT _CENTER_ABS MAX_STRESSES TXT file except that there is only one column for the element soil pressures When it is generated the first time by the STRESS restart analysis for soil pressure option the static pressure file has only zero values Then if the user inputs the non zero static pressure values and runs again the STRESS post processing restart for soil pressure option these non zero static pressures are added to the seismic pressures values using algebraic summation and the total soil pressures are saved in the soil pressure frames stored in the SOILPRES subdirectory If the soil pressure restart option is used two other text files are generated namely pres_max_ele and pres _max_nod files They contain the maximum element soil pressures calculated by STRESS and the average nodal soil pressures approximate values to be used only for plotting purpose in the SOLID elements that model the adjacent near field soil WARNING The STRESS frame files contain average nodal stresses and average nodal pressures to be used only for plotting purposes Note The nodal stresses and soil pressures were computed directly from the SOLID element center stresses or pressures normal stress to the s
162. amplitude seismic input motions The non uniform motion input is applicable to continuous foundations assuming that the free field motion complex amplitude varies in the horizontal plane after specific frequency dependent spectral patterns These patterns are described by the user using complex amplification factors at different borehole soil column locations computed with respect to the reference amplitude motion The non uniform motion assumption could be combined with motion incoherency and wave passage to create more realistic seismic environments The multiple support excitation option assume the existence of discrete isolated foundations such as bridge piers or multiple neighboring building foundations in a nuclear facility In the new version the differences between multiple input motions can be completely defined by nodal input complex amplitude transfer function rather than by a simple real amplitude scale factor as in the current version vi A new interpolation scheme for the complex responses was implemented The new interpolation scheme that uses bi cubic splines is recommended for complex FE models under incoherent seismic inputs The bi cubic spline interpolation should be applied only if the number of SSI frequencies is sufficiently large so that spectral peaks are not clipped by the smooth spline interpolation For such cases when number of frequencies is sufficiently large the bi cubic spline interpolation provides most accurate resul
163. an the size array limitation of 5 000 nodes per level The ACS SASSI Version 3 0 fast solver code has two major SSI problem size limitations for current MS Windows PC platforms 1 MS Windows OS limitation The maximum accessed RAM for the SSI problem is limited to 192 GB RAM for Windows 7 and 512 GB RAM for Windows 8 respectively and 2 ACS SASSI limitation The total node number should be less than 100 000 The governing limitation of the SSI problem size is due to the MS Windows OS limitation On MS Windows PCs with 16GB RAM SSI problems with sizes up to 100 000 nodes including up to 8 000 interaction nodes can be run efficiently with the fast solver using the in core SSI solution algorithm For the SSI problems including larger size models with more than 80 000 nodes and more than 10 000 interaction nodes MS Windows PCs with RAM ranging from 32 GB up to 192 GB are recommended For large size SSI problems with more than 18 000 22 000 interaction nodes MS Windows 8 PCs with up to 512 GB RAM are recommended Other SSI model size limitations applicable to both baseline and fast solver modules are EQUAKE Module Number of time steps for simulated acceleration histories 32 768 SOIL Module Number of time steps for simulated acceleration histories 32 768 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 13 ACS SASSI PREP User Manual 14 Number of soil material curves 100 Number of data for soil c
164. and section 6 1 2 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 All files generated by ACS SASSI PINT will be placed in the directory of the active model While ACS SASSI PINT is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 and displays the current status of module PINT in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI PINT is correct see Options Directories command section 6 5 1 6 3 10 Run the ACS SASSI FORCE Module Select FORCE from the Run submenu Shortcuts Tool bar t Keys F10 Use this command to run the ACS SASSI FORCE module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI FORCE will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI FORCE will prompt for the input and output files In this case all files generated by ACS SASSI FORCE will be placed in the directory of the ACS SAS
165. are defined for each element type see GROUP instruction see section 5 3 16 Element DOF with defined stiffness mass Type x Y Z XX YY Zz SOLID e 6 BEAMS t t t t t t SHELL t t t t t t 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 183 ACS SASSI PREP User Manual 184 Element DOF with defined stiffness mass PLANE SPRING t t t GENERAL LOVEWAVE Note for example that for solid elements only the translations are defined at the nodes If a node is common to two or more element types then the non trivial degrees of freedom are found by combination For example all six components are possible at a node common to both beam and solid elements i e beam governs Symmetrical structures with symmetrical loading only may also be analysed by modelling only one half or one quarter of the structure and constraining appropriate degrees of freedom on the planes of symmetry see SYMM instruction see section 5 1 45 5 2 3 Generate a Node Line FILL lt n1 gt lt n2 gt lt nr gt generates a line of nodes between two existing nodes by interpolation lt nr gt number of nodes to be filled in between lt ni gt and lt n2 gt if lt nr gt is not specified default value will be used lt nr gt lt n2 gt lt n1 gt 1 if lt ni gt and lt n2 gt are not specified these will be set to the latest two consecutively defined nodes 5 2 4 T
166. as set in the Analysis Options SITE input window box Number of Incoherency Modes Type the number of incoherent spatial modes to be used in the spectral factorization of the coherence matrix If a zero value is input the code assumes that all incoherency modes are used if a positive number n is input the code assumes that only n modes are used and if a negative number n is used then the code assumes that only the mode n is used The negative input is used in conjunction with the Quadratic SRSS deterministic approach that requires a separate SSI analysis for each incoherency 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 85 ACS SASSI PREP User Manual 86 modes For stochastic simulation and the linear AS deterministic approach we recommend to use all the incoherency modes that is the default option Including all modes offers the best accuracy without having any nonnegligible impact on the incoherent SSI runtime If Quadratic SRSS approach is used additional information in required by the MOTION module that is incorporated in the SRSSTF TXT file WARNING For flexible foundations the number of required incoherent spatial modes need much larger than for rigid foundations in order of tens or even hundreds on modes This makes the SRSS approach impractical for flexible foundation problems The SRSS approaches were implemented in ACS SASSI only for benchmarking purposes since the SRSS approac
167. ase should be equal to the value at frequency zero that defines the rigid body motion of the free field Non zero phases are due to stochastic simulation algorithm Only differential phasing is important to be captured Output Control Allows the user to chose to write the complex relative displacement interpolated transfer functions TFD files 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 118 ACS SASSI PREP User Manual 119 Acceleration Time History Data The Acceleration Time History Data Options are the options that are described and are also set set in the MOTION Module Node Output Data The user can select a list of nodes and degrees for freedom for the relative displacement calculations Computed relative displacement time histories are saved in THD files same format at ACC files Add Edit Node Entry When entering a node or editing an entry in the node list the window above appears which allow the user to select the node and the degrees of freedom that the RELDISP module will output when run Post Processing Options Save Relative Displacements in All Nodes Calculate and save relative displacements with respect to reference node DOF in all nodes in THD files Save Rotations for ANSYS Calculate and save relative rotational displacements with respect to reference node DOF in all nodes in THD files Restart for Frame Generation Compute and save frames for relative displacements wi
168. asis of there numerical order in the model The Plot Selected Nodes Elements requires 3 inputs per group the first is he minimum node element number to be displayed the next is the maximum node element number the final number is the node stride so certain node elements can be skipped over Contour Value Range Controls the minimum and maximum values of the color bar in the Contour Plot Animation Range 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 127 ACS SASSI PREP User Manual 128 Allow the user the ability to select a certain range of frames from the Vector Displacement plots Show Node Numbers Allows the user to display the node numbers on the plot in the vector bubble plots Output Direction Allow the user to select the Output that is being shown on the plot Show Wireframe Only Shows the deformed wireframe during the displacement animation Scale Factor Change the scaling for the Vector Displacement animation to make the data easier to interpret Frame Pause The minimum amount of time the program will wait between each frame note the program may wait longer between each frame due to hardware limitations model complexity Title Add or change plot title Window Options Display Nodes in Range Min Max Cancel x 862 5 1116 5 ZPA Value Range Z 60 5 327 9500 0 01 8 01 Number of Groups 0 Plot Selected Nodes l Show Node Numbers tat Output Direction fe xXx All
169. asses MUNITS lt n1 gt lt n2 gt lt inc gt lt units gt sets the units for the translational and rotational masses belonging to the node set defined by start node lt ni gt end node lt n2 gt default lt n1 gt and lt step gt default inc to mass units if lt units gt 0 or weight units if lt units gt 1 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 210 ACS SASSI PREP User Manual 211 6 ERRORS AND WARNINGS After running CHECK see section 5 1 8 a list of errors and warnings may be displayed For help on one of these messages press F7 or Enter or double click the left mouse button The help topics on these errors and warnings may help improve the model The AFWAITE instruction see section 5 1 4 will first execute the CHECK instruction 6 1 ERRORS Error 1 Illegal Acceleration of Gravity e The acceleration of gravity has a negative or zero value e Set the analysis options by selecting the Options Analysis command see section 3 5 3 Error 2 Illegal Node for Symmetry Plane Line lt i gt e The symmetry plane line lt i gt has a node either with illegal number or the node was not defined e Redefine the node for the symmetry plane line instruction SYMM section 5 1 45 Error 3 Illegal Number of Nodes for Symmetry Plane Line lt i gt e The symmetry plane line lt i gt has only one node e Redefine the nodes for the symmetry plane line instruction SY
170. at the node numbering for each foundation should be in a 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 89 ACS SASSI PREP User Manual 90 continuous sequence Input Motion Number Select the number of the active input motions that is equal to the number of isolated foundations or zones All following data refers to this motion First Foundation Node Type the number of the first interaction node for the selected isolated foundation or zone Last Foundation Node Type the number of the last foundation node for the selected foundation or zone These isolated foundation and or zone nodes have to be defined in a sequential node order with an unit increment Thus it is required that the interaction nodes to be defined in a sequential order for each foundation or zone i e do not skip node numbers for each foundation or zone X Coord of Control Point not used in this version The X coordinate is used to define the input motion location application Y Coord of Control Point not used in this version The Y coordinate is used to define the input motion location application Z Coord of Control Point not used in this version The Z coordinate is used to define the input motion location application Spectral Amplification Ratios SAR Type the spectral amplification ratios These SAR have real values for the standard solver version and complex values for the fast solver version The SAR define the ratio
171. ation embedment size iv Fast computation of global unconstrained soil foundation impedances for arbitrary shaped shallow embedded or buried foundations i e computing the global frequency dependent soil 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 6 ACS SASSI MAIN User Manual 7 foundation lumped parameters stiffness and damping including both the hysteretic and radiation energy loss These global impedances are unconstrained impedances so they do not include the effects of foundation stiffness but only soil stiffness For surface foundations under vertically propagating waves these unconstrained impedances are identical with the rigid foundation impedances Lumped global foundation complex soil impedance function matrix for rigid body motion with 6x6 size including all coupling terms could be extracted for a selected foundation reference point Note These global lumped unconstrained impedances cannot be used directly in a 2nd step analysis for the FE models with elastic foundations Rather than the global lumped soil impedances the distributed soil impedances that can be extracted from output data files for each frequency of interest This extracted data can be used to generate the spring dashpot elements distributed under the elastic foundations v The non uniform or multiple seismic input motion option includes the capability to consider variable amplitude seismic inpu
172. ation the use of ACS SASSI ANSYS integration capability is suggested rather than adding additional near field soil elements An alternate will be to use spring elements between the duplicate nodes defined at the foundation soil interface The ACS SASSI ANSYS integration capability can include non linear soil material and foundation soil 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 46 ACS SASSI MAIN User Manual 47 separation effects However if the local soil hysteretic behavior secondary nonlinearities is anticipated that affects significantly the SSI response then the use of adjacent near field soil elements to perform a nonlinear SSI analysis using ACS SASSI is recommended 13 Structural Modeling The structure is modeled by the 2D or 3D finite elements The selection of elements and nodal points follows the general rules of the finite element analysis The only limitations are a The structure must contain the interaction nodes inside the excavated soil in the basement even if there is no structural element to connect such nodes b All the interaction nodes of the structure which are below the ground surface must lie on the soil layer interfaces 14 Excavated Soil Volume Modeling In the SSI analysis of the embedded structures the excavated soil volume must be modeled by 3D SOLID elements or 2D PLANE elements The excavation volume is connected at the interaction nodes with the struc
173. ave strain compatible soil properties option 0 skip 1 save lt iter gt number of iterations lt ratio gt ratio between the equivalent uniform and maximum strain lt gravmul gt multiplier for acceleration of gravity lt format gt format for reading acceleration values lt cof gt cut of frequency It should be zero to get the maximum frequency transmission In the last version cof is always zero not user specified Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 39 Define Soil Profile Data for ACS SASSI SOIL Module SPRO lt layer gt lt prop gt lt dynprop gt defines the soil profile for ACS SASSI SOIL module lt layer gt sublayer number lt prop gt number of soil layer property lt dynprop gt label of dynamic soil property Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 176 ACS SASSI PREP User Manual 177 see section 3 5 6 5 1 40 Set the Response Spectrum Output Options for ACS SASSI SOIL Module SRS lt layer gt lt save gt lt outcrop gt defines the response spectrum output options for ACS SASSI SOIL module lt layer gt
174. ayer lt l gt Is Illegal e The thickness from soil layer lt l gt has a negative or zero value e Correct the thickness from the specified soil layer instruction MODL see section 5 3 26 Error 21 Specific Weight from Soil Layer lt I gt Is Illegal e The specific weight from soil layer lt l gt has a negative value e Correct the specific weight from the specified soil layer instruction MODL see section 5 3 26 Error 22 P Wave Velocity from Soil Layer lt I gt Is Illegal e The P wave velocity from soil layer lt l gt has a negative value e Correct the P wave velocity from the specified soil layer instruction MODL see section 5 3 26 Error 23 S Wave Velocity from Soil Layer lt I gt Is Illegal e The S wave velocity from soil layer lt l gt has a negative value e Correct the S wave velocity from the specified soil layer instruction MODL see section 5 3 26 Error 24 P Wave Damping Ratio from Soil Layer lt I gt Is Illegal e The P wave damping ratio from soil layer lt l gt has a negative value 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 214 ACS SASSI PREP User Manual 215 e Correct the P wave damping ratio from the specified soil layer instruction MODL see section 5 3 26 Error 25 S Wave Damping Ratio from Soil Layer lt I gt Is Illegal e The S wave damping ratio from soil layer lt l gt has a negative value e Correct the S wave damping ratio from
175. be simulated to reduce the error between the TFU and TFI The function accepts a file with a header the number of files with extension TFU and TFI to be processes and two tolerances with a list of TFU and TFI files to be compared The first tolerance allowable between the TFU and TFI i e if 90 is requested the function will limit output frequencies TFI TFU TFU gt 1 The second tolerance is minimum tolerance i e if 20 all points that are less than 20 of the maximum TFU value will be ignored Batch Frequencies file Format Line 1 Number of Files TFU TFI tolerance max min Tolerance Lines 2 Number of Files Name of the files without the TFU TFI extensions Example Input 5 95 20 00001TR_X 00002TR_X 00003TR_X 00004TR_X 00005TR_X This input will compare the TFU and TFI files for the five nodes listed with a tolerance of 95 ignoring all values below 20 of the maximum 3 3 4 Frame Selection This function will find the local maximums and minimums of a set of time histories and return the frames where a local min or max was found in one of the time histories The file format consist of a header and the list of files to be processed The header contains the number of files to be processed and a percentage that defines range of data to be ignored i e if 90 then all point that are between 90 of the global maximum and 90 of the global minimum will be ignored Each file is processed separately so the global m
176. ber lt ng gt The parameter lt type gt can be typed as a number or a string Group Group Number Description Type Type of Nodes number string 1 SOLID 8 3D solid element 2 BEAMS 3 3D beam elements 3 SHELL 3 or 4 3D plate shell elements 4 PLANE 3 or 4 2D plane strain solid elements 7 SPRING 2 3D spring elements translation or rotation 8 GENERAL 2 3D stiffness mass generalized element 9 LOVEWAV 3or4 1D plane Love wave elements E The excavated soil zones may be modelled using the following element types a SOLID b PLANE c LOVEWAVE The information excepting nodes which may be assigned to elements of each type is shown in the following table Group Type _ Element Data Instruction Description SOLID material soil layer index MSET section 5 3 24 page 197 element type ETYPE section 5 3 12 page 194 BEAMS material index MSET section 5 3 24 page 197 real property index RSET section 5 3 38 page 202 node release code KI section 5 3 18 page 196 J node release code KJ section 5 3 19 page 196 SHELL material index MSET section 5 3 24 page 197 thickness THICK section 5 3 43 page 203 PLANE material soil layer index MSET section 5 3 24 page 197 element type ETYPE section 5 3 12 page 194 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 195 ACS SASSI PREP User Manual 196 Group Type Element Data Instruction Description SPRING spring property index RSET section 5 3 38 page 202 LOVEWAV
177. ber of layers to simulate halfspace lt hs gt halfspace layer number lt mode2 gt mode 2 switch 0 skip 1 write lt wopt gt wave combination option 0 R SV and P waves 1 SH and L waves lt freqi gt frequency 1 for definition of wave curves lt freq2 gt frequency 2 for definition of wave curves lt cl gt layer number of control point lt cm gt control motion direction 0 X 1 Y 2 Z lt delt gt time step of seismic motion lt nft gt number of Fourier components power of 2 lt freq gt frequency set number 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 175 ACS SASSI PREP User Manual 176 Note This instruction is provided for input files To set the analysis options for the ACS SASSI SITE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 38 Define Analysis Options for ACS SASSI SOIL Module SOIL lt nrval gt lt gravacc gt lt header gt lt outcrop gt lt save gt lt iter gt lt ratio gt lt gravmul gt lt cof gt defines the analysis options for ACS SASSI SOIL module lt nrval gt number of acceleration values to be read from the time history file lt gravacc gt acceleration of gravity in m s 2 or ft s lt header gt number of header lines at the begining of the acceleration time history file lt outcrop gt outcrop motion option 0 disabled 1 enabled lt save gt s
178. bility user manual for more details For ANSYS the converter is applicable only to element types BEAM4 and BEAM44 SHELL63 SOLID45 COMBIN14 3D springs using Keyopt 2 and MASS21 For BEAM4 and BEAM44 elements the J and K nodes must be defined For BEAM44 only up to 24 real constant can be used The number of real constants in the CDB file Rblock should be 6 8 10 12 or between 20 and 24 If the constants associated with a BEAM44 is not 6 8 10 12 or between 20 and 24 fields long the Converter code will throw the error Unknown format beam RLBlock entry Only constant shear factors per beam are permitted Variable node shear factors for BEAM44 cannot be used For COMBIN14 elements the spring direction can be set using KEYOPT 2 KEYOPT 1 must be 0 The KEYOPT 3 was also included in this version for 0 1 The material properties need to be changed after the model is converted ANSYS uses density for materials while ACS SASSI uses specific weight The material data from the converter output file must be multiplied by gravity to get the correct material property for the SSI analysis The material damping is defined in ANSYS by DAMP and DMPR commands 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 67 ACS SASSI MAIN User Manual 68 Note The local axes for BEAM elements in ANSYS are different than in ACS SASSI The local axes Y and Z in ANSYS are the local axes 3 and 2 in ACS SASSI WARNING Please note
179. by selecting the Options Analysis command see section 3 5 3 Error 94 Illegal Correlation Factor e One of the correlation factors for ACS SASSI EQUAKE module is greater than 1 e Correct the correlation factor by selecting the Options Analysis command see section 3 5 3 Error 95 No Dynamic Soil Properties Assigned e No dynamic soil properties were assigned to sublayers for ACS SASSI SOIL module e Set the dynamic soil properties by selecting the Options Analysis command see section 3 5 3 Error 96 Too Many Dynamic Soil Properties e The sublayers for ACS SASSI SOIL module use more than 15 dynamic soil properties e Change the dynamic soil properties by selecting the Options Analysis command see section 3 5 3 Error 97 Dynamic property lt p gt has no shear modulus curve 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 226 ACS SASSI PREP User Manual 227 e The dynamic soil property lt p gt has no data defining the shear modulus shear strain curve e Define the shear modulus shear strain curve for the dynamic soil property by selecting the Options Analysis command see section 3 5 3 Error 98 Dynamic property lt p gt has illegal shear modulus values e One of the shear modulus values defining the dynamic soil property lt p gt is less than zero or greater than 1 e Correct the shear modulus for the dynamic soil property by selecting the Options Analysis com
180. c2_analys out D SASSI models sdb e2c2 7 6 7 1 Show Hide the Tool Bar Select Tool Bar from the View submenu Use this command to display and hide the tool bar which includes buttons for some of the most common commands in ACS SASSI MAIN A check mark appears next to the menu item when the tool bar is displayed 6 7 2 Show Hide the Status Bar Select Status Bar from the View submenu Use this command to display and hide the status bar which describes the action to be executed by the selected menu item or depressed tool bar button and keyboard latch state A check mark appears next to the menu item when the status bar is displayed The left area of the status bar describes actions of menu items as you use the arrow keys to navigate through menus This area similarly shows messages that describe the actions of tool bar buttons as you depress them before releasing them If after viewing the description of the tool bar button 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 81 ACS SASSI MAIN User Manual 82 command you wish not to execute the command then release the mouse button while the pointer is off the tool bar button The right areas of the status bar indicate the active model database and active model if any For Help press F1 D ASASSI models sdb e2c2 6 7 3 Show Hide the Status Panel Select Status Panel from the View submenu Use this command to display and
181. cable to elastic foundation models The SRSS approach requires a SSI restart analysis for each incoherent mode The SRSS approach is also difficult to apply since it has no convergence criteria for the required number of the incoherent spatial modes For flexible foundations the number of required incoherent spatial modes could be very large in order of several tens or even hundreds on a case by case basis that could make SRSS impractical for elastic foundation problems The SRSS approaches were implemented in ACS SASSI for benchmarking purposes since this approach was validated by EPRI for stick models rather than for their practicality Note The SRSS approach could provide incoherent responses that are overly conservative in the mid frequency range sometime even much higher than coherent responses and non conservative in the high frequency range iii Nonlinear hysteretic soil behavior is included in seismic SSI analysis using the Seed Idriss iterative equivalent linear procedure for both the global due to wave propagation in free field and the local soil nonlinearity due to SSI effects The local soil nonlinear behavior could be included using near field soil elements For the SSI iterations the ACS SASSI code uses a fast SSI reanalysis or restart solution that uses the already computed far field soil impedance matrix available from the SSI initiation run This feature reduces the run time per SSI iteration by a factor of 5 to 20 times depen
182. can be enodal forces enodal moments enodal translational masses enodal rotational masses 1 5 MODELING CAPABILITIES AND LIMITATIONS The ACS SASSI code has the following main modeling capabilities and limitations 1 5 1 Soil Layering Excavated Soil and Structural FE Modeling 1 The site soil layering consists of semi infinite elastic or viscoelastic horizontal soil layers on a rigid base or a semi infinite elastic or viscoelastic half space The half space is simulated by additional soil layers added automatically by the SITE module plus a viscous boundary at the bottom non linear behavior is approximated using the Seed ldriss equivalent linear constitutive model 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 12 ACS SASSI MAIN User Manual 13 WARNING The number of soil layers should be larger than 20 layers This requirement is important when uniform soil deposits need to be modeled A small number of soil layers could affect the accuracy of the Rayleigh and Love wave modes computed by SITE The number of half space layers that is defined by the user should be 20 layers for most accurate results 2 The structures are discretized using standard 2D and 3D finite elements connected at nodal points Each nodal point on the structure may have up to six displacement degrees of freedom The user has the freedom to delete one or more of the degrees of freedom thereby reducing the size of the problem accordingl
183. can be performed also automatically by the ACS SASSI code Step 6 Select the discrete structural model Step 7 Select the discrete excavated soil model Step 8 Select the computational method for the impedance matrix Step 9 Select the frequencies for which the site response and point load problems are to be solved It is recommended to choose at least 40 to 50 frequencies for simple stick models and 50 to 150 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 39 ACS SASSI MAIN User Manual 40 frequencies for complex SSI models These frequencies are selected according to the information obtained from Steps 1 and 2 and later on can be increased if necessary to improve the accuracy of the interpolated transfer functions Step 10 Perform initiation coherent SSI analysis to compute the acceleration complex transfer functions at all the nodes of the system a Execute SITE module in Mode 1 and 2 based on the information of Steps 5 and 9 and the specified location of the control motion This analysis yields the information needed to form the transmitting boundary in the program module POINT The Mode 1 information is saved in FILE2 Mode 2 performs the site response analysis by using FILE2 as input and the sit input file that describes the nature of the seismic wave field This analysis yields a set of free field motions which are saved in FILE1 b Execute the POINT module using also FILE2 as inpu
184. cation factor and maximum value used to scale the acceleration time history file are both non zero e Correct the multiplication factor or maximum value by selecting the Options Analysis command see section 3 5 3 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 223 ACS SASSI PREP User Manual 224 Error 79 No Element Output Request e There are no element lists for output defined e Add some element lists by selecting the Options Analysis command see section 3 5 3 Error 80 Illegal Group For Output Request lt g gt e One of the defined element lists for output requests are set to the illegal group number lt g gt e Correct the element list by selecting the Options Analysis command see section 3 5 3 Error 81 Illegal Element Output Request lt e gt Group lt g gt e One of the defined element lists for output requests set to group number lt g gt contains the illegal element number lt e gt explicitly or contained in a range e Correct the element list by selecting the Options Analysis command see section 3 5 3 Error 82 Element Output Request Defined More Than Once lt e gt Group lt g gt e The defined element lists for output requests contain the element number lt e gt of group lt g gt more than once explicitly or contained in a range e Correct the element lists by selecting the Options Analysis command see section 3 5 3 Error 83 Matrix Property lt
185. ciently high frequency content for vertically propagating waves In these situations the user should carefully revise and understand SSI results by inspecting the computed transfer functions at different node locations In some situations when soil properties are not uniform with depth or when Poisson ratios are large about 0 47 0 48 or larger numerical instabilities could occur at isolated frequencies in the free field solution This result can affect SSI response at few isolated frequencies By inspecting the computed acceleration transfer functions ATF at several nodal locations the frequencies that manifest instabilities can be identified The computed results for those frequencies need to be dropped out from SSI analysis The SSI solution at these frequencies should not be considered for interpolating the complex transfer functions in the MOTION and STRESS modules Sensitivity studies by considering adjacent frequencies to those that are suspected to produce spurious results are highly recommended Irregular soil zone adjacent to the structure can be incorporated on the discretized finite element model If the analyst wants to get the seismic soil pressures on the foundation walls and mat then he she needs to include in the SSI model an adjacent soil layer modeled by SOLID elements surrounding the foundation walls and under basemat This adjacent soil layering can slowdown the run time by a factor of 2 or even more For seismic pressure evalu
186. ck procedure to show warnings Show Errors Select this option if you want the check procedure to show errors Break Check at Messages Set the maximum number of messages that will be listed in the Check Errors window see section 3 7 1 The default value is 50 3 5 3 Set the Analysis Options for the ACS SASSI Modules Select Analysis from the Options submenu 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 62 ACS SASSI PREP User Manual 63 Shortcut Tool bar This command is used to set the analysis options for the active module The Analysis Options dialog box contains the following pages EQUAKE Sets the options for the ACS SASSI EQUAKE module SOIL Sets the options for the ACS SASSI SOIL module SITE Sets the options for the ACS SASSI SITE module POINT Sets the options for the ACS SASSI POINT3 or POINT2 module HOUSE Sets the options for the ACS SASSI HOUSE module ANALYS _ Sets the options for the ACS SASSI ANALYS module FORCE Sets the options for the ACS SASSI FORCE module MOTION Sets the options for the ACS SASSI MOTION module STRESS Sets the options for the ACS SASSI STRESS module RELDISP Sets the options for the ACS SASSI RELDISP module AFWRITE Sets the options for the AFWARITE and CHECK instructions see sections 5 1 4 and 5 1 8 3 5 4 Set the Analysis Options for the ACS SASSI EQUAKE Module The EQUAKE module is used for generating artificial acceleration histories
187. ckground Color Axes Color z Cancel Text Color Help Color for Shear Modulus Line B Color for Damping Line z 3 5 28 Change the 3d Interactive Window Color The following window allow the user to change the color options for the Bubble Vector Contour and Deformed Shape Windows Background Color Select this button to change the background color Text Color Select this button to change the text title color 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 133 ACS SASSI PREP User Manual 134 Window Colors Text Color Cancel za Help Background Color Node Node Text Color 3 5 29 Change the Font of the Active Window Select Font from the Options submenu Use this command to set the font of the active window The following options allow you to customize the font for the active window Font Select the font name from this list Font Style Select the font style from the list box Size Select the font size from the list box Sample This shows a text sample using the current font settings 3 5 30 Change the Selection for the Active Model Plot Window Select Select Plot from the Options submenu Use this command to select the elements to be plotted 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 134 ACS SASSI PREP User Manual 135 Element Selection Nodes Elements NMin NMax Group BA a ae
188. coherent SSI complex response phase used in EPRI studies and called herein SRSS TF and quadratic superposition of the incoherent modal SSI complex response ATF amplitudes assuming a non zero phase for the incoherent SSI complex response that is equal to coherent SSI complex response phase not used in EPRI studies The SRSS phase option for the SRSS TF approach is selected inside the STRSSTF txt input file for the MOTION module see Section 3 5 11 by a flag variable that can be O zero phase or 1 non zero phase The fifth deterministic approach that is implemented in ACS SASSI is an alternate version of the SRSS approach that does not neglect the complex response phase This deterministic approach is called herein the SRSS FRS and is applied to the SSI end response quantity that could be either ATF ISRS or ZPA To apply the SRSS FRS approach the user has to select deterministic Linear option instead of Quadratic option in the HOUSE input window and then run MOTION repeatedly for each selected incoherent mode The user will need to SRSS the SSI response end results of interest provided MOTION or STRESS For rigid foundations the incoherency induced stochasticity of the basemat motion is driven by the global or rigid body spatial variations integral variations of free field motion and therefore is less complex and random than free field motion The rigid foundation motion has a smoothed spatial variation pattern since the kinematic S
189. compatible with given response spectra EQUAKE computes the response spectra PSD and Fourier spectra only for positive frequencies for the simulated or external acceleration time histories It has also three options for simulated acceleration phasing 1 uniformly distributed random phasing for X Y and Z components 2 based on the recorded accelerogram phasing for X Y and Z components and 3 based on the user defined nonstationary correlation pattern between X and Y components The following options allow you to specify the analysis options for ACS SASSI EQUAKE module Spectrum Files Spectrum Number Select the spectrum number max three spectra for the three translation in space can be defined Spectrum Input File Type or select the given spectrum input file for the selected spectrum Edit Click this button to edit the selected spectrum input file Spectrum Output File 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 63 ACS SASSI PREP User Manual 64 Type or select the spectrum output file for the selected spectrum Acceleration Output File Type or select the acceleration output file for the selected spectrum Optional Spectrum Files Accel Record Select this option if you want to use a recorded acceleration input file for controlling the complex Fourier transform phasing for the generated spectrum compatible accelerogram Simulated acceleration will have the same phasing as recorded accelera
190. control motion sec The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Total Duration Type total duration sec Correlated Select this option for nonstationary correlated components If this option is selected type in the table the time correlation coefficients at different selected times during the shaking duration Spectra Title Type the title Number of Random SEEDs Number of the random SEED trials to be simulated It should a nonzero integer value EQUAKE will retain the best response spectrum fitted acceleration history from the set of simulated compatible accelerations The PSD criterion is not checked for the simulated acceleration histories Only the PSD psd file is generated Target PSD If check box is checked then the user should provide the filename for the target PSD text file The target PSD file format consists of two columns the first column is the frequencies and the second column is the target PSD amplitude data The PSD amplitude data should be either in the the International units as cm sec 3 or British units as inch 2 sec 3 depending on the unit system selection for Gravity Acceleration input WARNING The EQUAKE module uses the gravity acceleration units to determine velocity and displacement units and PSD units The gravity acceleration value should be defined in any of the SOIL SITE or HOUSE input windows The gravity acceleration units should be either in the Internati
191. ction e Stress Strain XZ Direction The stresses in 2D PLANE elements are computed at the center of the element and are referred to in global axes These stresses are shown in the following figure Figure 3 9 Stresses in the 2D PLANE elements SPRING elements The available components are e Force X Direction Force Y Direction Force Z Direction Moment XX Direction Moment YY Direction Moment ZZ Direction The available requests for each component are e No Request e Print Only Maximum Response e Print Maximum and Save Time History of Response if this option is selected time histories of the requested response are stored to File15 This file can later be used to recover the time histories for plotting purposes In newer versions FILE15 was replaced by ths files that contain component stress time histories for the selected elements The STRESS output the spring forces and displacements in global coordinates 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 115 ACS SASSI PREP User Manual 116 FILE15 contains spring displacements The ths tfu and tfi files contain the relative displacements between end nodes in global coordinates If multiplied with the stiffness constants they are equal with the forces WARNING The signs of the computed spring forces should be defined based on the relative displacements between the spring end nodes that were computed using the RELDISP module The way h
192. ction 5 1 1 file for ACS SASSI EQUAKE module ACCOUT Sets the acceleration time history section 5 1 2 output file for ACS SASSI EQUAKE module ACT Activates an existing model section 5 1 3 AFWRITE Writes the analysis files section 5 1 4 AMP Defines spectral amplification ratios for section 5 1 5 ACS SASSI HOUSE module ANALYS Defines analysis options for ACS section 5 1 6 SASSI ANALYS module AOPT Sets options for AFWRITE and section 5 1 7 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 159 ACS SASSI PREP User Manual 160 Instruction Action Description CHECK CHECK Checks data section 5 1 8 CORR Sets spectra correlation values for section 5 1 9 ACS SASSI EQUAKE module DAMP Adds resets damping ratios for RS section 5 1 10 analysis DEL Deletes a model section 5 1 11 DYNP Defines data for dynamic soil section 5 1 12 properties EOUT Adds element output request for ACS section 5 1 13 SASSI STRESS module EQTIT Defines spectra title for ACS SASSI section 5 1 14 EQUAKE module EQUAKE Defines analysis options for ACS section 5 1 15 SASSI EQUAKE module FORCE Defines analysis options for ACS section 5 1 16 SASSI FORCE module FREQ Adds deletes frequency numbers to section 5 1 17 from frequency set HOUSE Defines analysis options for ACS section 5 1 18 SASSI HOUSE module INCOH Defines incoherence analysis options section 5 1 19 for ACS SASSI HOUSE module INP Switches input
193. ction 6 3 1 page 66 The model remains active until you select another one and is displayed in the Status Bar see section 6 7 2 page 81 The active model will be inherited by the pre processor Models may be opened also by using the Model 1 2 3 4 command see section 6 1 4 page 60 ACS SASSI MAIN opens the Open Model dialog box The following options allow you to specify which model to open Database Type or select the model database Models Select the model name from this list Description Shows a brief description of the currently selected model Open Choose this button to open the selected model Delete 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 59 ACS SASSI MAIN User Manual 60 Choose this button to delete the selected model Attention files are actually deleted and cannot be recovered Open Model xi Database Open SASSI test1 sdb gt Cancel Models Description test Note Before performing this command make sure that a model database is active 6 1 3 Close Active Model Select Close Model from the Model submenu Shortcut Tool bar Use this command to close the active model 6 1 4 Open Specified Model Select 1 2 3 4 from the Model submenu Use the numbers and model names listed at the bottom of the Model menu to open the last four models you opened Choose the number that corresponds with the model you want to open 6 1 5 Exi
194. ctor Transfer Function Plot Window Select Vector TF Plot from the Plot submenu Shortcuts none Use this command to open a new Vector Plot window When this command is first entered it will bring up the Open Plot Data window where the user can find the data file to be displayed by the bubble plot as well as give a title for the plot area Open Plot Data Data File Title Cancel Data File User input for a file path for a Vector Animation Data file lt lt Button user can click to open a file open popup window The File Open window will allow the user to graphically search the directory structure to find the Vector Animation data file 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 52 ACS SASSI PREP User Manual 53 Title User input which will add an initial title to the plot window when opened After the OK button is pushed the data from the file should be loaded and the Plot should appear The Vector Plot is a animated plot window x K Model File Batch Plot Options Window View Help 25 29 e Slos xl al lel KE S save x 2 AFwarre 6 elele lala fem t e Me Halea ele Frame 14 iii aee ame a BPE p yen g a Saat SIROREMER NS He ik Gh If For Help press Fl NUM Model Movement Control The Vector Plot window controls for model manipulation which allows the user to view the mode
195. d in the following sections 4 2 1 Initiation Seismic SSI Solution Runs The initiation SSI analysis run basically consists of 5 major computer runs 1 EQUAKE Run gt produce seismic input acceleration for SOIL MOTION and STRESS 2 SOIL Run gt produce effective soil properties for SITE based on non linear free field analysis 3 SITE Run Mode 1 and 2 gt produce soil and wave information needed by POINT HOUSE and ANALYS 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 50 ACS SASSI MAIN User Manual 51 4 POINT POINT2 or POINT3 Run gt produce compliance function results for ANALYS 5 HOUSE Run gt produce structural matrices and non uniform incoherency motion information to be used by ANALYS and STRESS 6 ANALYS run Mode 1 gt produce SSI complex transfer function TF solution acceleration TF for seismic analysis 4 2 2 Post Solution Runs Once FILE8 is obtained it is used to compute the required response of the system through one or more of the following runs 1 COMBIN run 2 MOTION run 3 STRESS run Note COMBIN run is necessary only if new frequencies are to be added to the old FILE8s they must be renamed FILE81 and FILE82 The MOTION and STRESS runs are independent to each other and depend on the scope of the analysis 4 2 3 Restart SSI Solution Runs The basic restart analysis modes include 1 New Structure 2 New Environment 3 New Dynamic Loading not avail
196. d modules see section 5 1 4 Exit ACS SASSI PREP The model will be saved automatically From ACS SASSI MAIN run the selected modules and view the output files see ACS SASSI MAIN User s Guide DEMO EXAMPLES The ACS SASSI code is delivered together with six demonstrative problems that can be used for fast track learning of the ACS SASSI use These six demo problems include te ee D SSI Analysis for Reactor Building Stick Model with No Embedment SSI Analysis for Concrete Pool Structure with No Embedment ANSYS to ACS SASSI Model Conversion Example PREP or SUBMODELER Nonlinear SSI Analysis for A Deeply Embedded Structure Pile Model ACS SASSI ANSYS Integration Capability for A Deeply Embedded Structure Stress Analysis Using Equivalent Static and Dynamic Analysis Option A ACS SASSI ANSYS Integration Capability for A Deeply Embedded Structure Seismic Soil Pressure Analysis Using Linear and Nonlinear Equivalent Linear Analysis Option A ACS SASSI ANSYS Integration Capability Demonstration for Performing SSI Analysis Using the ANSYS Structural Model Directly for Surface and Embedded SSI Models Option AA These demo problems are realistic problems and include detailed documentations on how to run ACS SASSI program for different applications 2 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 20 ACS SASSI PREP User Manual 21 3 MENU COMMANDS ACS SASSI Prep Model File Batch Plot Opti
197. d then the coherency matrix eigenvectors or the seismic load vector can be assembled later using a special restart as described at page 53 in MAIN manual and page 94 in PREP manual 5 Isolated vs Multiple Structures Using ACS SASSI the structure soil structure interaction SSSI problems can be analyzed in 3D space As shown by recent evidence these SSSI effects can be significant on a case by case situation The SSSI effects may be significant depending on a particularity of the problem The effect of motion incoherency could affect the SSSI effects especially for large size foundations Incoherency 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 43 ACS SASSI MAIN User Manual 44 could sometime produce larger relative displacements between neighbor buildings with different foundation sizes 6 Non uniform Seismic Motion Input Results have shown that for nonuniform soils in horizontal plane the seismic input is not the same over the foundation area especially for the large size foundations or for multiple structure foundations in SSSI models The in situ measured soil columns at different boreholes under foundation areas could be different Often the soil columns from different in situ boreholes could indicate slightly different soil motion amplifications to ground surface The ACS SASSI code can consider a variable amplitude seismic excitation inputs for a single continuous foundation or for s
198. ded in the fast solver code and was included in the standarad solver code only for research and benchmark purposes The Skin Method was not validated under our company NQA 1 program and should not be used for nuclear applications 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 23 ACS SASSI MAIN User Manual 24 Explanation 1 Interface Node O 2 Intermediate Node A 3 Internal Node EPeoneeoan E TL EP ooreean aPeenoeode EPeeceeeean Eeeeeecean Beeaeageae ale oles EEEE ad EE le blebs felt a Foundation b Separated Foundation Figure 2 3 Foundation system for Skin Method 2 4 STRUCTURAL ANALYSIS The SSI analysis using SSI substructuring including superstructure plus the basement minus the excavated soil as shown in Figure 2 2 The structure plus basement is also called the near field zone This entire zone may be modeled in 2D or 3D using either quadrilateral or solid finite elements 2 5 SUMMARY OF COMPUTATIONAL STEPS The steady state equations of motion for the near field zone are expressed in matrix form as shown in Section 2 1 As indicated by the matrix equation in Section 2 1 for each frequency the impedance matrix the load vector and the dynamic stiffness matrices C K M for the structure including the basement and any soil irregular zone and the excavated soil are formed After forming the equations of motion they must b
199. des per level The ACS SASSI Version 3 0 fast solver code has two major SSI problem size limitations for current MS Windows PC platforms 1 MS Windows OS limitation The maximum accessed RAM for the SSI problem is limited to 192 GB RAM for Windows 7 and 512 GB RAM for Windows 8 respectively and 2 ACS SASSI limitation The total node number should be less than 100 000 The governing limitation of the SSI problem size is due to the MS Windows OS limitation On MS Windows PCs with 16GB RAM SSI problems with sizes up to 100 000 nodes including up to 8 000 interaction nodes can be run efficiently with the fast solver using the in core SSI solution algorithm For the SSI problems including larger size models with more than 80 000 nodes and more than 10 000 interaction nodes MS Windows PCs with RAM ranging from 32 GB up to 192 GB are recommended For large size SSI problems with more than 18 000 22 000 interaction nodes MS Windows 8 PCs with up to 512 GB 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 9 ACS SASSI MAIN User Manual 10 RAM are recommended Other SSI model size limitations applicable to both baseline and fast solver modules are EQUAKE Module Number of time steps for simulated acceleration histories 32 768 SOIL Module Number of time steps for simulated acceleration histories 32 768 Number of soil material curves 100 Number of data for soil curves 11 Number of soil layers 200 SITE
200. ding of the foundation embedment size iv Fast computation of global unconstrained soil foundation impedances for arbitrary shaped shallow embedded or buried foundations i e computing the global frequency dependent soil foundation lumped parameters stiffness and damping including both the hysteretic and radiation energy loss These global impedances are unconstrained impedances so they do not include the effects of foundation stiffness but only soil stiffness For surface foundations under vertically propagating waves these unconstrained impedances are identical with the rigid foundation impedances Lumped global foundation complex soil impedance function matrix for rigid body motion with 6x6 size including all coupling terms could be extracted for a selected foundation reference point Note These global lumped unconstrained impedances cannot be used directly in a 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 10 ACS SASSI PREP User Manual 11 2d step analysis for the FE models with elastic foundations Rather than the global lumped soil impedances the distributed soil impedances that can be extracted from output data files for each frequency of interest This extracted data can be used to generate the spring dashpot elements distributed under the elastic foundations v The non uniform or multiple seismic input motion option includes the capability to consider variable
201. duces the text file FILE16 FILE16 could be a very large size file Therefore selecting the coherence decomposition accuracy checking option only when it is very needed and justified is suggested FILE16 is produced only by the baseline code HOUSE module HOUSE produces the text file FILE78 that is a non empty file only if nonlinear SSI analysis option is used FILE78 is used by STRESS during the SSI nonlinear iterations The HOUSE module can be executed independent of SITE and POINT modules However HOUSE requires that the SITE input file the sit file to be available in the working directory WARNING The HOUSE module incorporates an optimizer for the node numbering This node numbering optimizer is highly effective for large size SSI models with significant embedment The Option AA HOUSEFSA module uses automatically the optimizer We always recommend use of the node numbering optimizer for larger size embedded SSI problems To select the node renumbering optimizer the analyst can use the SUBMODELER Options Analysis HOUSE input window or he can type directly the number 1 in the first line and first column of the HOUSE input text file the hou extension file No other changes are needed in the hou file After running HOUSE a new HOUSE input text file with the hounew extension and a new map extension text file will be saved in the same working directory This hounew input file contains the new optimized SSI model while the map file contain
202. e THD subdirectory includes THDR for rotational displacements These frame text files contain the SSI response values computed for all active nodal DOF at each time step These node frame files are used by the ACS SASSI PREP module to create structural deformed shape animations See Table 2 for more details on frame text files 12 Module STRESS The STRESS module computes requested stress strain and force time histories and peak values in the structural elements The input file has extension str and it is created by the ACS SASSI PREP AFWRITE command The module STRESS requires FILE4 and FILE8 as inputs Stress time histories are saved in the text file called FILE15 In addition to these text files STRESS also produces FILE74 if the nonlinear SSI analysis option is employed For nonlinear SSI STRESS also uses FILE78 produced by HOUSE as an input 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 33 ACS SASSI MAIN User Manual 34 In addition to the output file STRESS produces also some specific text files useful for post processing These text files include the extension TFU TFl and THS that contain structural element stress responses in each selected element respectively the computed TF TFU interpolated TF TFI and stress time histories THS These text file names have the format etype_gnum_enum_comp plus extension for example BEAMS_003_00045 MXJ_ that contains the MX moment at node J
203. e ACS SASSI SITE module see Options Analysis command see section 3 5 6 5 3 22 List Soil Layers LLIST lt m1 gt lt m2 gt lt step gt lists the table of soil layer properties between lt m1 gt and lt m2 gt default last defined with step lt step gt default 1 5 3 23 Define a Material M lt nms gt lt val1 gt lt val2 gt lt weight gt lt pdamp gt lt sdamp gt lt type gt defines the material number lt nm gt If lt type gt 1 lt val1 gt is the elasticity modulus and lt val2 gt is the poisson coefficient if lt type gt 2 lt vall gt and lt val2 gt are the constrained and shear moduli and if lt type gt 3 lt val1 gt and lt val2 gt are the P and S Wave velocities For all cases lt weight gt is the specific weight lt pdamp gt is the P wave damping ratio and lt sdamp gt is the S wave damping ratio Note lt pdamp gt and lt sdamp gt must be equal for materials assigned to SHELL elements 5 3 24 Set Active Material Soil Layer Index 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 197 ACS SASSI PREP User Manual 198 MACT lt index gt sets the active material soil layer index to lt index gt All elements defined after this command and before another MACT command will have the material soil layer index automatically set to lt index gt 5 3 25 List Materials MLIST lt m1 gt lt m2 gt lt step gt lists the table
204. e Soll ayers es nin a a a E E Seer AEE 190 53 2 Delete Maleng S EE aa 190 5 3 3 Delete Real PropertieS cccccccceeeeeeseeeeeceeeeeeeeeeeeeeeaeeeeeeeeeeeeeseseaaeeeeeeeeeeeeeneees 190 5 3 4 Delete Spring Propenlesrt anata nite aa ata alee nnna 190 AoAo ABIRE In Ine i od erecta sc E tas Ss owe eek ted Wad tere ed eas ale dias eatin es 190 5 3 6 C mpress Elements naear aaae aaa era a ara E ea a aaa Ea aaa occ cues 192 5 3 7 Delete EIOMOIMS kf caieretstysseatenceabededyerhd ed etehedeteeaheiedpuahcdatebebetedeahateteteb eine teeta 193 5 3 8 Generate Elements by Translation ccccceeeeeeeeeeeeeneeeeeeeeeeeeeeeeeeeeeeeeeeeeenes 193 5 3 9 Set Integration Order for SOLID element ceeeeeeeeseeeeeeeeeeeeeeeeeeeeeeeeeeeees 193 59A UIST EIGN GINS i tease he Satie e a Henares eros e aah aa A EA E EEA aor ENEA A a atta ital 193 5 3 11 Modify an exl 31012 Entree Repent en ROM nein nee ner ee nner PUTT Pe ee Tn eer pre ee 194 5 3 12 Set Type for SOLID PLANE or LOVEWAVE Elemente 00cceeeeeeeee 194 B 3 1 OSGODV a GOUD nnne a aa ica tah abated 194 5 3 A DSTI OU Shoat aa aa ea aa ra atana arara aara Eaa 194 Copyright 2014 by Ghiocel Predictive Technologies Inc 5 ACS SASSI PREP User Manual 6 DN 156 ILISUGIOUDSccrtctinteiatectatastaterede a A E A N 194 5 3 16 Create or Activate a GrOUp eceeeeeeceeecceeeeeeeeeeeeeeaeeeeeeeeeeeeeseeeaaeeeeeeeeeeeeaaees 195 5 917 S6t Group Ti
205. e aE che a a i ai Oat 136 3 6 1 Arrange Windows in Horizontal Non Overlapped TileS eeeeeeeeeeeeeeeeeeeeees 137 3 6 2 Arrange Windows in Vertical Non Overlapped TileS ccccceeeeeeeeeteeeeeeeeeeeees 137 3 6 3 Arrange Windows in an Overlapped Fashion cccccccccceceeeeeeeeeeeeeeeeeeeeeneeees 137 3 6 4 Arrange Icons of Closed Wind OWS visio casicect esti occa vacener gece osseeepaoeceaceeeseseiteuetneds 137 3 6 5 Close the Active WINGO WS xe ccecttec tern sevsacchouneeck ewexatabauusecehenenetebovene Cibeeser eb e lt toeees 138 3 6 6 Close All Opened WinNdOWS ccccceceeeeeeeeeeeneeeeeeeeeeeeeeeceaeeeeeeeeeeeeeeeeneneeeeeeeees 138 3 7 VIEW SUBMENU e ieia a tents E set E E aE AE AAE aa iai aa 139 3 7 1 Show Hide the Check Errors WindOW ccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeaaeaees 139 3 7 2 Show Hide the Plot Info WindoW sssssessssnnnnenessessrnrnrnrnsseerrnnnnnnnnsseernnnnnne 140 3 7 3 Show Hide the Tool Bars cscs ce i a a aa 140 3 7 4 Show Hide the Status Baris ccicehshesis ted aetcekelechachidestaetsdeciactidasticatilistastidesdistoaeasl 141 3 7 5 Show Hide the Instruction Line seeeeeseseneeeeeseeserrrnrrtreserrrrnnnnnn nn rnnnnnenenenne 141 3 7 6 Activate Specified WINKdOW 1241 4 n oils ee egies iene eg ee og ieee ogee eee 142 Copyright 2014 by Ghiocel Predictive Technologies Inc 2 ACS SASSI PREP User Manual 3 3g AE P SUBMENU
206. e actions of tool bar buttons as you depress them before releasing them If after viewing the description of the tool bar button command you wish not to execute the command then release the mouse button while the pointer is off the tool bar button The right areas of the status bar indicate which of the following keys are latched down Indicator Description CAP The Caps Lock key is latched down NUM The Num Lock key is latched down SCRL The Scroll Lock key is latched down 3 7 5 Show Hide the Instruction Line Select Instruction Line from the View submenu Use this command to display or hide the nstruction Line A check mark appears next to the menu item when the instruction line is displayed 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 141 ACS SASSI PREP User Manual 142 The instruction line is typically displayed at the bottom of the ACS SASSI PREP window just above the status bar Type the instructions in the edit box of the instruction line and press the Enter key to run You may run instructions from input files see the Model Input command see section 3 1 3 you may re run instructions using the Instruction History tool bar see section 4 2 or you may use the instruction specific dialog boxes generated by the Instruction Wizard from the Instruction List tool bar see section 4 3 3 7 6 Activate Specified Window Select 1 2 from the View submenu ACS SASSI PREP di
207. e of these features the new version is at least 3 times faster for external force cases than the previous version Note For the moment fast solver is not applicable to 2D SSI models and symmetric models but only to 3D SSI models with arbitrary geometries The ACS SASSI ANSYS interfacing capability covers an area that was uncovered up to now for practical engineering applications This capability provides an advanced two step SSI approach that can include more refined FEA structural models in the second step including some local nonlinear material and or nonlinear geometric effects in the structure or at foundation interface with the soil There are two ACS SASSI ANSYS interfacing options i Option A or ANSYS and ii Option AA or Advanced ANSYS Demo problems are provided to help users understand how to best use the ACS SASSI ANSYS interface using Options A and AA OPTION ANSYS or A The Option A ACS SASSI ANSYS interfacing capability is based on an integrated two step SSI approach the 15t step is the overall SSI or SSSI analysis using the ACS SASSI model and the 2 step is the detailed structural stress analysis using the ANSYS model with 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 4 ACS SASSI MAIN User Manual 5 the input boundary conditions defined by the SSI responses from ACS SASSI The 2 step can have two distinct functionalities i perform structural stress analysis using refined
208. e section 3 2 2 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 41 ACS SASSI PREP User Manual 42 Model file Batch Plot Options Window View Help 3 R X cal sif save F AFWRITE ENE m j SM pi LIRIMIT 3 4 3 Open a New Time History Plot Window Select Time History form the Plot submenu Shortcuts Tool bar Keys F6 Use this command to open a new window containing the Time History Plot ACS SASSI PREP opens the View Time History File dialog box 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 42 ACS SASSI PREP User Manual 43 Open File Time History File Name C Documents and Settings dan Multiplication Factor 0 Maximum Value 0 m Graph Title The following options allow you to specify which time history file to open Time History File Name Type or select the time history file If you assigned a time history file for the active model to the analysis options for module MOTION see Analysis Options MOTION dialog box section 3 5 11 or STRESS see Analysis Options STRESS dialog box section 3 5 12 then this file will be the default File Contains Pairs Time Step Accel Select this option if your time history file contains pairs of time step an acceleration values on each line The default is set from the active model s analysis options see above Multiplication Factor Type the multiplication factor for sca
209. e section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI MOTION is correct see Options Directories command section 6 5 1 page 77 6 3 14 Run the ACS SASSI STRESS Module Select STRESS from the Run submenu 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 73 ACS SASSI MAIN User Manual 74 Shortcuts Tool bar Keys Shift F6 Use this command to run the ACS SASSI STRESS module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI STRESS will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI STRESS will prompt for the input and output files In this case all files generated by ACS SASSI STRESS will be placed in the directory of the ACS SASSI STRESS module While ACS SASSI STRESS is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module STRESS in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command ma
210. e section 6 7 3 page 82 and displays the current status of module COMBIN in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI COMBIN is correct see Options Directories command section 6 5 1 page 77 6 3 13 Run the ACS SASSI MOTION Module Select MOTION from the Run submenu Shortcuts Tool bar Keys Shift F5 Use this command to run the ACS SASSI MOTION module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI MOTION will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI MOTION will prompt for the input and output files In this case all files generated by ACS SASSI MOTION will be placed in the directory of the ACS SASSI MOTION module While ACS SASSI MOTION is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module MOTION in the corresponding progress bar All modules may be run automatically using the Run All Start command se
211. e solved The matrices involved are often large especially for 3D SSI problems and therefore they are saved in matrix blocks on the hard drive The SSI solver uses the skyline per block algorithm 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 24 ACS SASSI MAIN User Manual 25 Below are given details on the operations which must be performed for each SSI frequency step of the SSI analysis 1 Form complex dynamic stiffness of structure The total frequency dependent complex stiffness of the structure is computed using the total stiffness and mass matrices 2 Form complex dynamic stiffness of excavated soil The total frequency dependent complex stiffness of the excavated soil is computed using the total stiffness and mass matrices 3 Form impedance matrix lf the flexible volume or interface methods are used then the entire flexibility matrix for the interaction nodes is constructed using the flexible volume method The flexibility matrix is then inverted in place using an efficient subroutine for symmetrical matrices to obtain the impedance matrix which is stored in the same form 4 Form total stiffness of soil structure system The total stiffness is obtained by adding the impedance matrix to and subtracting the excavated soil volume dynamic stiffness from the total stiffness of the soil structure system 5 Form load vector For seismic analysis the load vector is computed by multiplying the
212. e the SSI responses in terms of acceleration histories at selected locations and structural stress force histories in elements Simultaneous Cases only in the SUBMODELER module This optional input is only for the fast solver HOUSE module To save significant SSI runtime for batch runs the ANALYSFS can solve simultaneously all three X Y and Zinput directions for seismic analysis seismic option or to up to 9 load cases of external forcing function vibration option For seismic analysis the user should type 1 to get all three X Y and Z direction results in a single run The ANALYS run results will be saved in three FILE8 files computed for X Y and Z inputs named FILE8X FILE8Y and FILE8Z The ANALYS output will include ATF computed for all three directions To use this option for seismic analysis the SITE module should be run before ANALYS run for X Y and Z direction inputs and generate the FILE1X FILE1Y and FILE1Z files The user should select the SV waves for the X direction by selecting x direction and 0 angle in the sit SITE input file the SH waves for the Y direction by selecting y direction and 0 degree angle and the P waves in the Z direction by selecting z direction and 0 angle The coordinate transformation angle in the anl ANALYS input file should be 0 It should be noted that if the Simultaneous Cases is selected for incoherent SSI analysis then the FILE77 produced by HOUSE should be also duplicated in the FILE78 and F
213. e x y z coordinate system as defined by the ACS SASSI SITE module and must be transformed to the global structural coordinate system xyz in module ANALYS Therefore the user must enter the angle between the two coordinate systems and the location of the control point on the horizontal plane Mode 2 New Structure If the physical properties of the structure s are changed or the geometry of the structure is altered then as long as other data remain intact module ANALYS may be restarted for New Structure Mode 2 In order to use this mode a new FILE4 with the n4 extension has to be generated by re executing module HOUSE Since the geometry and numbering of the nodal points below the ground have not changed the impedance matrices can be recovered The information on the two input files is then used to compute the new reduced modified stiffness of the structure FILE1 or FILEQ is also an input file so that the new transfer functions of the response can be computed and then saved in a new FILE8 Mode 3 New Environment For standard solver code if the seismic environment is changed the information from FILE1 changes while that from File5 and File6 n5 and n6 extension remain the same Therefore the ANALYS module could be restarted for New Seismic Environment Mode 3 with the new FILE1 and restart ffiles as inputs The results are saved in a new FILES For the fast solver code the role of the restart files File5 and
214. eated by the ACS SASSI PREP AFWRITE command The POINT module computes information required to form the frequency dependent flexibility matrix The results are saved on FILE3 FILE2 created by program module SITE is required as input Thus the SITE module must be run before the POINT2 or POINT3 module 6 Module HOUSE The HOUSE module forms the element mass and stiffness matrices of all elements that are stored in FILE4 The input file has extension hou and it is created by the ACS SASSI PREP AFWRITE command The FEA model may include only the structure and also the near field soil especially of irregular soil zones are present For the Option AA the HOUSEFSA input includes also the ANSYS model files as described in the ACS SASSI ANSYS Integration Capability User Manual For the baseline code with the standard solver the structure and basement stiffness and mass matrices are stored in FILE4 For the fast solver code the structure and basement stiffness and mass matrices are stored in the COOSK and COOSM files 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 28 ACS SASSI MAIN User Manual 29 The random field decomposition for incoherent motions is performed in this module The HOUSE results for incoherent SSI or non uniform multiple support excitation option are stored in FILE77 to be used by ANALYS If the user desires to check the accuracy of the coherence kernel decomposition HOUSE pro
215. echnologies Inc 76 ACS SASSI MAIN User Manual 77 Select Stop from the Run All submenu Shortcuts Tool bar S Keys Ctrl T Use this command to stop the automatic running procedure To select modules for the automatic running procedure select the Run All Options command see section 6 4 1 page 75 To start the automatic running procedure use the Run All Start command see section 6 4 2 page 76 6 5 OPTIONS SUBMENU ACS SASSI MAIN iof x Model File Run Run All ie Window View Help g l i Font I EQUAKE Module FS Sem kiei D SASSI models sdb e2c2 6 5 1 Set Directories for ACS SASSI SITE Modules Select Directories from the Options submenu Use this command to set the directories and names for the ACS SASSI modules using the Directories dialog box Set the directories and names for the ACS SASSI modules by typing in the corresponding edit box or click the button on the right of the edit box and select the directory and name from the File Open like dialog box 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 77 ACS SASSI MAIN User Manual 78 Pre Processor SIY 2304 07 29 1 O diskAo sassiprev230a exe gt gt OK RAEE D ACSV2300 ptionA ACSSASSIV2304 07 29 gt gt Tal Soil Mesh Gen D ACSY2300 ptionAACSSASSIV2304 07 29 gt gt Help ea pe EQUAKE Module DACSY2300 ption4ACSSASSIV2304 07 29 SOIL Module D ACSV2300pt
216. ection Print Preview Displays the file on the screen as it would appear printed Print Prints a file 1 2 3 4 Opens specified file PREP Runs the ACS SASSI PREP pre processor EQUAKE Runs the ACS SASSI EQUAKE module SOIL Runs the ACS SASSI SOIL module LIQUEF Runs the ACS SASSI LIQUEF module not included SITE Runs the ACS SASSI SITE module POINT Runs the ACS SASSI POINT module HOUSE Runs the ACS SASSI HOUSE module PINT Runs the ACS SASSI PINT module not included FORCE Runs the ACS SASSI FORCE module ANALYS Runs the ACS SASSI ANALYS module COMBIN Runs the ACS SASSI COMBIN module MOTION Runs the ACS SASSI MOTION module STRESS Runs the ACS SASSI STRESS module RELDISP Runs the ACS SASSI RELDISP module CONVERTERS File converters to pre format ANSYS Eq Static Launch ANSYS Static Load Generator 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 56 ACS SASSI MAIN User Manual Run All Options Window View Help Load ANSYS Dynamic Load ANSYS Soil Model Generator BATCH Options Start Stop Directories Files Font Tile Horizontally Tile Vertically Cascade Arrange Icons Close Close All Tool Bar Status Bar Status Panel 1 2 3 4 Help Topics About 6 1 MODEL SUBMENU 57 only for Option A described in separate manual Launch ANSYS Dynamic Load Generator only for Option A described in separate manual Launch ANSYS Soil Mesh Generator onl
217. eeeeeeeeeeeaaes 80 6 6 2 Arrange Windows Side by Side VertiCal cccceeeeeeeeeeeeneeeeeeeeeeeeeeeeenneeeeeeeees 80 6 6 3 Arrange Windows OVverlapped a casctcdciiccatanseretcctnciacinetauimiicnsnteauecencses 80 6 6 4 Arrange Minimized WindOWG ccccceeeeeececeeceeeeeeeeeeeeeecaaeaeeeeeeeeeeeenecaaeaeeeeenes 80 6 6 5 Close the Active WINDOW ii s2 ilsn 5 4 ccedideaidndsdanecs Sedation dadeusdedidedidudsdeaidndsGaeseeveaten needs 81 6 6 6 Close All Active WINKOWS sicoc2s0cncccsceceesansncnenczcoteesntinctesdi ondtenatbed tenet oneesebbnneeiatingues 81 6 7 VIEW SUBMENU S onere vais poo csc ch case veer a bo Ha eo UE 81 LS ay Gem Uo 1606 a Hidethe ToolBar eran am en a ny een ree en ee 81 6 7 2 Show Hide the Status Bale scx ueeiee oises acetie isis eects apate te haeteencecaseeeceasdvessd 81 6 7 3 Show Hide the Status Panel ccccccceeeeeeeeeeesecceeeeeeeeeeeseeeaeeeeeeeeeeeeeeeeeeeaeaeaaa 82 6 7 4 Activate Specified WIN GOW 22 c5 222c2ss2zccstsaseaacacenanahenengesceebranetesaneaaseeacenantanee seuenhiesctie 82 6 8 HELP SUBMENU inrrcntemmnn aun yan ea ees na A N A aoe 82 2 WWI WE ICID ICS eee ea a a nace inal ae a ea 83 Copyright 2014 by Ghiocel Predictive Technologies Inc 2 ACS SASSI MAIN User Manual 3 6 8 2 View About VV IMOOW Ec ceuiaet ae eetar nce arctan ranch neu an akestanomnarnoeenunemneh sous cyenehanest 3 83 7 TOOL BAR BUTTON Bice srcieece a a tet aa aa aaa hone nad ad
218. eeeeeeeeeeeeeeeeeeeeeeaee 51 4 2 5 New Seismic EAVIFONMONE 1 c5508 coke eeesbeessheepeneeeespensnsssoeeseeteserantennersecneneenensneet 52 4 2 6 New Dynamic LOCA sscecd acta cece cela aca cece taraisan sh negra glee ce svsedue cases weaved ee 52 4 2 7 New Seismic Load Vector in the LOADXxxx or LOADXYZxxx fil S 0 008 52 S Ao WINGS ARE Dak Scr cree an cadecctvact nna activa chennai E E E 53 6 MENU COMMA N DS cores ica esses tains tite soars Raat tine Mu aE Vinee to tases te Geta ih aes an eas ew anette 56 6 1 WI DE es WII IN sacri a ss ava nee hws Garman has Sem cae ws PORE Ce Meant SNR 57 6 1 1 Open or Create Database ccccececceeeeceee eee eeeeeecneeeeeeeeeeeeeeeecaaeeeeeeeeeeeteeeenaaeeees 58 6 1 2 Open a MOC lass cs hott cheered a edreebebyih hha etedriet sb ateacnebedeeeebatgeatlagead Sates 59 6 1 3 Close Active MOGI 2 n ccecccncccuccenecensennnsendnetccesnenaneenscensuersenngeantennssencendecdeu ened tence 60 6 1 4 Open Specified MOdel eeecceesccccceeeeeeeeeeeeeeeeeeeeeeeeeeesaaaeaeeeeeeeeeeseeeeaaeeeeeeeeaas 60 6 1 5 PX ACS SASSI IMAI parann manea e e it ae a ate dad aeaa Aad dead 60 62 i I chic Bi ra es awe erica eve coh eae vac ve tes austen db vaantve EAE Eaa aa aaa 61 621 0peman Existing Flessen iiai iaaa a neiaie a di aa aE a Sa i 61 Copyright 2014 by Ghiocel Predictive Technologies Inc 1 ACS SASSI MAIN User Manual 2 6 2 2 S6lect Primeri a allt aaa naaa aaa a Scatchard
219. eeeeeeeeeeeeeeeseenaeeeeeeeeeeneeaaees 40 3 4 3 Open a New Time History Plot Window c cccceeeeeeeeeeeeeeeneeeeeeeeeeeeeeaneaeeees 42 3 44 Open TFU FI CUNGS 12 2 5 a aeia aea aa raa a A E AAEE ecweecsselevestcsde wierd 44 3 4 5 Open Soil Layer Plot WindOW cccceeeeeeeeeeeeeeeeeeeeeeeeeecnaeaeeeeeeeeeeeeeeeaeaeaaaaees 45 3 4 6 Open a Spectrum Plot WiNdOW cccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeteeeeeenees 46 3 4 7 Open Impedance Plot WindOW cceceeeeeeeeeeeeeeneeeeeeeeeeeeeececaaeeeeeeeeeeeteeeeeees 47 3 4 8 Open a Soil Property Plot Window iss vceiscivesshcna ch cet pareuehins chuats ciceesbaey sna bioetemstamaieis 47 3 4 9 Open Bubble Plot WindOw ccceeeeeesseeeeeeeeeeeeeeeeeeeeaaaeeeeeeeeeeeeeeneneeeaeaaaeeees 49 3 4 10 Open Vector Transfer Function Plot WindOW ccccceceseeeeeeeeeeeeeeeeeeeeeaeeeeeees 52 3 4 11 Open Contour Plot Window Static Animated ceeceeeeeeeeeeeeeeeeeeeeeeaneneeees 54 3 4 12 Open Deformed Shapes Plot WindOW ccccceeeeeeeeeeeneeeeeeeeeeeeeeeeeeeeeeaaaaeeees 57 3 0 OP TIONS SUBMENU cai citer carats eh cen ance en acer ene eds 60 Copyright 2014 by Ghiocel Predictive Technologies Inc 1 ACS SASSI PREP User Manual 2 325 1 S6t the Model OptlonS irsini a 61 3 5 2 Set the Check Optlonss cc sccciecnsesenescgeascseneevsonhcsissacpapaenbengeeusatarsaesabapeungebrenerancesicens 62 3 5 3
220. el 4 2007 model for hard rock sites and all foundations and 2007 model for soil sites and surface foundations Abrahamson 2007 Models 5 and 6 respectively and the user defined coherency model Model 7 It should be noted that at this time only the 2007 Abrahamson for hard rock site conditions is accepted by US NRC The user defined model requires that the user defines the coherent functions for the X Y and Z directions in separate text files called COHXUSER COHYUSER and COHZUSER with no extensions The user needs also to define the SSI frequency file FREQCOH and the relative distance file DISTCOH NOTE It should be noted that the matrix size of 100 x 100 is the default dimension of the user defined coherent function matrices However the size of the coherent function matrix sizes could be smaller if the sizes are defined by their integer values in the hou file as illustrated in the V amp V Problem 39 of the NQA version where the sizes of the coherent function matrices were 61 frequencies x 81 distances However at this time the PREP and the SUBMODELER modules do not permit changes in the sizes of the user defined coherent function matrices Luco Wong model can be applied with or without wave passage option checked Abrahamson are applied only with the wave passage selection checked Coherence Parameter X Direction Horizontal Component Type the Luco Wong mode coherence parameter in X direction This parameter value lies usua
221. el Please check if all resumed information is updated Opens an input file Opens closes an output file Opens a new Model Plot window Opens a new Time History Plot window Opens a new Soil Layer Plot window Opens a new Spectrum Plot window Opens a new Soil Property Plot window Opens a file Prints the active window Sets the analysis options for the ACS SASSI modules Writes the analysis files for the ACS SASSI modules Requests context sensitive help Detailed Description section 3 1 1 section 3 1 2 section 3 1 3 section 3 1 4 section 3 4 1 section 3 4 3 section 3 4 5 section 3 4 6 section 3 4 8 section 3 2 1 section 3 2 5 section 3 5 3 section 4 1 1 section 4 1 2 4 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 144 ACS SASSI PREP User Manual 145 4 1 1 Write the Analysis Files for the ACS SASSI Modules Select from the Main tool bar Shortcut Keys Ctrl Shift A This command runs the AFWRITE instruction see section 5 1 4 using the analysis options set by the Options Analysis command see section 3 5 3 4 1 2 Request Context Sensitive Help Select from the Main tool bar Shortcut Keys Shift F1 Use the Context Help command to obtain help on some portion of ACS SASSI PREP When you choose the tool bar Context Help button the mouse pointer will change to an arrow and question mark Then click somewhere in the ACS SASSI PRE
222. el without nodes Error 43 No Groups Defined e Your model has no groups e This is a fatal error Check has stopped after this message You cannot check a model 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 217 ACS SASSI PREP User Manual 218 without groups Error 44 Frequency Set lt s gt Is Not Defined e The frequency set specified in the analysis options is not defined e Check the analysis options Options Analysis command see section 3 5 3 or define the frequency set instruction FREQ see section 5 1 17 Error 45 Mode 1 and Mode 2 Are Both Deselected e The mode 1 and mode 2 options for the SITE module are both deselected e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 46 No Top Layers e The top layers list for the SITE module is empty e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 47 Illegal Number of Layers for Halfspace Simulation e The number of layers for halfspace simulation must either be zero or lie between 4 and 20 e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 48 Illegal Frequency Step e The frequency step has a negative value e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 49 Illegal Time Step of Control Motion e The time step ha
223. elength and Least Decay SV Wave Select this page to set the SV wave field options choose between No SV Wave Field SV Wave Field P Wave Select this page to set the P wave field options choose between No P Wave Field P Wave Field SH Wave Select this page to set the SH wave field options choose between No SH Wave Field SH Wave Field L Wave Select this page to set the L wave field options choose between No L Wave Field L Wave Field Wave Ratio 1 Type the wave ratio for the selected wave type at the first frequency Wave Ratio 2 Type the wave ratio for the selected wave type at the second frequency In the case of seismic environment composed of two or more wave types the ratio of participation of each wave type must be given This ratio in general may be frequency dependent and is defined at two discrete frequencies for each wave type These frequencies must cover the frequency range of analysis The ratio values for 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 73 ACS SASSI PREP User Manual 74 intermediate frequencies will be obtained by simple interpolation and therefore need not be given at exact frequencies for which complete solution is required In the case of seismic environments consisting of one simple wave type the two frequencies one in the beginning and the other at the end of the frequency range of analysis with assigned ratio values of 1 are enough to define the ra
224. em in parallel on multiple machines Finally this option writes a second batch file into the SSI model directory called Combine bat The user is expected to collect all of the Set folders where runbatch bat has been executed and place them back in the original model folder Once the user has all of the set folders with FILE8 files in the original model directory the Combine bat file can be used to combine the FILE8 file into a single unique FILE8 that corresponds to the entire original frequency set Examples Runbatch bat file 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 37 ACS SASSI PREP User Manual 38 echo off set mname BellNssOld mkdir work cd work echo mname gt site inp echo mname sit gt gt site inp echo mname _site out gt gt site inp echo mname gt point inp echo mname poi gt gt point inp echo mname _point out gt gt point inp echo mname gt house inp echo mname hou gt gt house inp echo mname _house out gt gt house inp echo mname gt analys inp echo mname anl gt gt analys inp echo mname _analys out gt gt analys inp for j in X Y Z do if j NEQ Y copy mname _ j sit Ymname sit lt site inp copy mname _ j poi Ymname poi lt point inp if j EQU X copy mname _ j hou Ymname hou lt house inp copy mname _ j anl mname anl lt analys inp mkdir jDI
225. embedded structures under incoherent inputs or large size structures under multiple input excitations This restart option permits to the analyst to modify the seismic load vector the files LOADXxxx LOADYxxx and LOADZxxx or file Lorryload Using this restart option the user can run directly the SSI solution for the modified seismic load vector To launch this restart the user needs to type the number 6 on the 2 line column 10 on the 2 line of the ANALYSIS input text file anl file Note The seismic load vector is saved in the LOADXxxx LOADYxxx and LOADZxxx files in a single column format and in the LOADXYZ files in a three column format with one column for each direction X Y and Z The seismic load vector length is equal to the number of equations of motion for the overall SSI system WARNING For the implementation of this restart option for incoherent SSI analysis of deeply embedded structures technical support is needed 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 38 ACS SASSI MAIN User Manual 39 4 APPLICATION GUIDELINES A set of guidelines describing the step by step procedure for a SSI analysis is given in this section Section 4 1 describes the steps which are usually taken during ACS SASSI analysis In the last part of this section these steps are further elaborated and the important parameters of the analysis are discussed in more detail Section 4 2 describes the ACS SA
226. ements 0 mass units 1 weight units lt mass gt overwrite masses option 0 add 1 set lt force gt overwrite forces option 0 add 1 set Note This instruction is provided for input files To set the model options from the ACS SASSI PREP desktop use the Options Model command see section 3 5 1 5 1 24 Define Analysis Options for ACS SASSI MOTION Module MOTION lt opmodes gt lt out gt lt step gt lt dur gt lt res gt lt freq1 gt lt freq2 gt lt fstep gt lt mult gt lt max gt lt rec1 gt lt rec2 gt lt fopt gt lt bl gt lt smo gt lt cplx gt lt cnvrt gt lt pzad gt lt interp gt defines the following analysis options for ACS SASSI MOTION module lt opmode gt operation mode 0 complete solution 1 data check only lt out gt output option 1 full output 0 only transfer functions to be output lt step gt output time history step 0 print only table gt 1 print every lt step gt th point lt dur gt total duration of time histories to be plotted lt res gt type of response 0 output only displacements 1 output only velocities 2 output only accelerations 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 170 ACS SASSI PREP User Manual 171 lt freqi gt first frequency used in response spectrum analysis lt freq2 gt last frequency used in response spectrum analysis lt fstep gt total number
227. ent lt e gt Group lt g gt Face lt f gt This message occurs for SHELL PLANE or LOVEWAVE elements with four or three nodes when the smallest angle is too small in comparison with the greatest angle All faces are checked for SOLID elements This is not an error but you can get bad results from the analysis program Warning 3 Warped Element lt e gt Group lt g gt This message occurs for four nodes SHELL PLANE or LOVEWAVE elements when the four nodes are not quite on the same plane Warning 4 Unused Node lt n gt Check found node lt n gt that is not used in any element except K nodes from BEAMS elements You can set the node to fixed DOF instruction D see section 5 2 2 or AFWRITE see section 5 1 4 will set the fixed DOF automatically in the analysis files not in the model Warning 5 Translational Mass in Node lt n gt Is on Fixed DOF You defined a translational mass that corresponds to the node lt n gt which has fixed DOF in the model or will be generated by AFWRITE see section 5 1 4 This is not an error but the analysis program will not take that mass into account Warning 6 Rotational Mass in Node lt n gt Is on Fixed DOF You defined a rotational mass that corresponds to the node lt n gt which has fixed DOF in the model or will be generated by AFWRITE see section 5 1 4 This is not an error but the analysis program will not take that mass into account Warning 7 Group lt g gt Ha
228. ent analysis NOTE It should be noted that the matrix size of 100 x 100 is the default dimension of the user defined coherent function matrices However the size of the coherent function matrix sizes could be smaller if the sizes are defined by their integer values in the hou file as illustrated in the V amp V Problem 39 of the NQA version where the sizes of the coherent function matrices were 61 frequencies x 81 distances However at this time the PREP and the SUBMODELER modules do not permit changes in the sizes of the user defined coherent function matrices Motion Incoherency Simulation This option is used for simulating the seismic motion incoherency field at the interaction nodes The user has the options to use either Deterministic Median Input assuming zero phase angles between different motion spatial wavelength components or Stochastic ally Simulated Input assuming random phase angles in the interval 180 180 degrees If the user selects a pair of a random arbitrary SEED numbers for the Horizontal and the Vertical components and a 180 degree angle for the Random Phase angle for different wavelength components then a stochastic motion incoherency field is simulated and further used in SSI analysis If the user selects zero values for the two SEED numbers then a deterministic median motion incoherency field is generated and used in SSI analysis If the Deterministic Median Incoherency Input is used one of the two options
229. ents For SOLID PLANE elements with ETYPE 2 the PREP assumes that they are also excavation volume elements and interprets their material assignations by the MSET command as the free field soil layer assignations Soil Motion Select the soil motion type from Coherent and Incoherent options The seismic incoherent SSI option applies only to three dimensional SSI models with no axis of symmetry i e only for full models not applicable for 2D models or half models The ACS SASSI code includes six incoherent SSI approaches namely five deterministic 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 83 ACS SASSI PREP User Manual 84 approaches based on the AS and SRSS approaches two these being benchmarked in the 2006 2007 EPRI reports and a rigorous but still highly numerically efficient stochastic simulation approach also used the 2006 2007 EPRI reports as the Simulation Mean approach please also see ACS SASSI MAIN Sections 1 5 and 4 1 for details The ACS SASSI code include seven plane wave incoherency models including the Luco Wong model 1986 Luco and Wong 1986 Model 1 theoretical but unvalidated in practice five Abrahamson models empirical based on seismic dense array records Models 2 through 6 1993 and 2005 models for all sites and surface foundations Abrahamson 1993 and 2005 Models 2 and 3 respectively 2006 model for all sites and embedded foundations Abrahamson 2006 Mod
230. eparate foundations In this case the foundation should be divided into multiple zones that for each one the user input a slightly different seismic excitation motion using frequency dependent amplitude amplification factors Motion incoherency and wave passage effects can be included in addition to nonuniform or multiple input excitations to create a more realistic seismic environment 7 Symmetry of the System The baseline code has the capability to take advantage of the geometrical symmetry of structure subjected to symmetrical or anti symmetrical loading Therefore the run time of the analysis can be drastically reduced by utilizing this capability of the program The parameter in SYMM command in ACS SASSI PREP module is used to specify the number of symmetrical planes of the system The incoherent motion and impedance evaluation options are not applicable for half or quarter models and 2D models The symmetry option cannot be applied using the fast solver code The fast solver cannot consider 2D or 3D symmetric models or motion incoherency inputs 8 Rigid Base Rock vs Halfspace Condition The program has the capability to simulate the existence of a uniformly damped or undamped halfspace below the bottom soil layers Therefore this feature can help avoid using very deep soil models with many sublayers and leads to additional savings when the soft soil extends to relatively large depth or when the rock boundary can be established In case
231. equencies are needed to be included The COMBIN module requires two solution files of FILE8 type as inputs These input files are renamed FILE81 and FILE82 The output file of this module is a new FILE8 obtained by combining the two solution files 3 2 PERFORMING SSI ANALYSES AND REANALYSES To be able to run successfully ACS SASSI SSI analysis the user should maintain all the text input files produced by the AFWRITE command in the same working directory The sequence for a linear seismic SSI analysis is EQUAKE if needed SOIL if needed and then SITE POINT HOUSE ANALYS MOTION if needed and STRESS if needed The sequence for the linear external force vibration analysis SSI analysis is SITE POINT FORCE HOUSE ANALYS MOTION if needed and STRESS if needed For nonlinear soil seismic SSI analysis in addition to the regular SSI module input files two additional input text files are needed These are the files with extensions liq and pin see HOUSE input definition in PREP user manual The ACS SASSI SSI analysis runs can be done interactively or in the batch mode If the SSI runs are done interactively using the ACS SASSI MAIN module then each SSI module is executed at a time under user control using MAIN Run menu or a set of SSI modules is executed automatically using the MAIN Run All menu If the SSI runs are done in the batch mode under a DOS window then a batch file needs to be created To run a SSI module in batch mode
232. er Manual 155 Shortcut Keys Ctrl P If this button is pressed all elements will be colored with their beam spring property colors This way you can see all elements having each property To change the beam and or spring property colors select the Options Colors command see section 3 5 23 4 4 17 Display Node Numbers Ni Select from the Plot tool bar Shortcut Keys Ctrl Shift N If this button is pressed all node numbers will be drawn near the nodes The text color for the node numbers can be changed by selecting the Options Colors command see section 3 5 23 Note To display the node and element numbers for a specific element move the mouse over the desired element and click the left mouse button 4 4 18 Display Element Numbers Select from the Plot tool bar Shortcut Keys Ctrl Shift E If this button is pressed all element numbers will be drawn in the center of each element The text color for the element numbers can be changed by selecting the Options Colors command see section 3 5 23 Note To display the node and element numbers for a specific element move the mouse over the desired element and click the left mouse button 4 4 19 Display Group Numbers Select from the Plot tool bar Shortcut Keys Ctrl Shift G 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 155 ACS SASSI PREP User Manual 156 If this button is pressed all group numbers
233. eration values to be read from the time history file Multiplication Factor Type the multiplication factor for scaling the time history Use only if Max Value for Time History is blank Max Value for Time History in g s Type the maximum value of time history to be used The values of the time history will be scaled to this value Use only if Multiplication Factor is blank Acceleration of Gravity This acceleration value is used for free field or site response analysis using SOIL module The acceleration of gravity value should be in ft sec2 or in m sec2 depending if the British System BS or International System IS is used Number of Header Lines Type the number of header lines at the beginning of the acceleration time history file Cutoff Frequency This frequency is the cut off frequency for the site response analysis If zero the code considers that the maximum frequency is the Nyquist frequency The revised SOIL version uses the maximum frequency independently of the user input Control Point Layer Type the layer number of the control point The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Acceleration History File Type the full path and name of the time history file To view the time history file use the Plot Time History command see section 3 4 3 Assign as Outcrop Motion Select this option if you want to assign the input motion as an outcrop motion 3 MENU COMMANDS Copyright
234. erent SSI approach in HOUSE This SRSSTF txt file indicates the number of incoherency modes and the name of 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 101 ACS SASSI PREP User Manual 102 each File8 obtained from the incoherent SSI analysis for each considered mode by a separate SSI analysis or restart SSI analysis using New Environment option after HOUSE is run repeatedly for each mode The format of the SRSSTF txt file is as follows of modes phase option FILE8 for 1 mode or FILE8 for Coherent if phase option 1 FILE8 for 2 mode FILES for nth mode The SRSS phase options are 1 Type 0 for applying SRSS with zero phase to the SRSS TF and 2 Type 1 for applying the coherent phase to the SRSS TF The user is required to rename the File8 after each ANALYS run See example below FILE8_coh is for the coherent input and FILE_OJ is for each J th mode of the total of 10 incoherency modes considered Example of the SRSSTF txt for the SRSS approach with the coherent phase option for a set of 10 selected incoherency modes 10 1 FILE8 coh FILE8 01 FILE8 02 FILE8 03 FILE8 04 FILE8 05 FILE8 06 FILE8 07 FILE8 08 FILE8 09 FILE8_ 10 This input uses the coherent phase for the SRSS transfer functions so the first FILE8 coh in the above list is from the coherent SSI analysis For zero phase option the second line with FILE8_coh should be skipped Interpolation Option To get
235. es similar with 2005 Type 3 2005 Abrahamson model for all sites and surface foundations Type 4 2006 Abrahamson model for all sites and embedded foundations Type 5 2007 Abrahamson model for hard rock sites Type 6 2007 Abrahamson model for soil sites and surface foundations Type 7 User defined coherent functions for X Y and Z directions It should be noted that in the fast solver version the Models 2 7 can be rotated using the wave passage direction to define the principal axes of motion For the case of 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 86 ACS SASSI PREP User Manual 87 directional coherency models the alpha parameter should be close to the extreme values 0 and 1 For the radial coherency models alpha is 0 5 If the option for the user defined coherent functions is used then the user is required to define the values of the frequency point and distance point vectors in FREQCOH and DISTCOH text files and the coherent functions for the X Y and Z directions in the COHXUSER COHYUSER and COHZUSER text files The user defined coherent function matrices shall have a size of 100 x 100 This implies that user shall define the coherent function variations for 100 frequencies and 100 relative distances in FREQCOH and DISTCOH files The selected frequencies and relative distances should cover the frequency range of interest and the foundation size of the SSI model to be used for the incoher
236. es taste oe Ace a le ah ath tea AN A 196 5 3 18 Define End Release Code in Node of BEAMS Elements ceeeeeeeee 196 5 3 19 Define End Release Code in Node of BEAMS Elements eeeeeee 196 5 3 20 Assign K Node to BEAMS Elementte 2 cccceeeeeeeeeeeeeeneeeeeeeeeeeeeeeeeneeeeeees 196 5 3 21 Define a Soil LAVOh a 5t4 ste cesesenhsesiencccesacehcapnesendcntaceheanansyagaebbcntcapseamadumsgeeboresdadd 197 53 22 LIST SOM CAV GMS aaea ae e e aa a cxanenteeddce Ea AE aa Aa AE E EE AEE E 197 5 39 29 DelINe a Matea ea ra aa a aa sue AEE Eaa E a DA EA OAA E A E EE ERA EDANE EAE 197 5 3 24 Set Active Material Soil Layer INde X cccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeeeeees 197 SS oan lo cello cee ee ee ne 198 53 26 Modify a SOll LAVOlsr T ices it lat a tiled eleva eee 198 5 3 27 Modify a Maleidlaa2 24 ais eae ee eee ee eee 198 5 3 28 Modify a Real PrOpeny iia ci aaa ak aha ahaa ahie abcer atadbeane 198 5 3 29 Modify a Spring Propet ics occ ccc eccg ccc cckeccanaenpetuancteccnnecnseckaaste couceeupecunanmeecge 199 5 3 30 Set Element Material Soil Layer IndeX ccccceeeeeseeeceeeeeeeeeeeeeeeeeneeneeeeeees 199 53 31 Modify Ne Oro UD TVPG vsssccsstes a co ieee Seats teat araitaeal aa aaa iaa 199 5 3 32 Delete Matrix PropertieS cccccceeeeesescccceeeeeeeeeeeeeneeeeeeeeeeeeeessenaeeeeeeeeeeeeeaees 199 5 3 33 Set Terms for Matrix Property Imaginary Part of Sti
237. es in Soil Dynamics Report No EERC 78 29 Earthquake Engineering Research Center University of California Berkeley December Lysmer J Tabatabaie Raissi M Tajirian F Vahdani S and Ostadan F 1981 SASSI A System for Analysis of Soil Structure Interaction Report No UCB 81 02 Geotechnical Enginering University of California Berkeley April Ostadan F Tseng Wen S Lilhanand K 1987 Application of Flexible Volume Method to Soil Structure Interaction Analysis of Flexible and Embedded Foundation 9th SMiRT Conference Lausanne Switzerland Seed H B and Idriss M 1969 The Influence of Soil Conditions on Ground Motion during Earthquake Journal of Soil Mechanics and Foundations Division ASCE Vol 94 No SM1 99 137 December Seed H B and Idriss I M 1970 Soil Moduli and Damping Factors for Dynamic Response Analysis Report EERC 70 10 Earthquake Engineering Research Center UCB December 8 References Copyright 2014 by Ghiocel Predictive Technologies Inc 88 ACS SASSI MAIN User Manual 89 50 51 52 53 54 55 56 57 Short S A G S Hardy K L Merz and J J Johnson 2006 Program on Technology Innovation Effect of Seismic Wave Incoherence on Foundation and Building Response Electric Power Research Institute Palo Alto CA and US Department of Energy Germantown MD Report No EPRI TR 1013504 December Short S A
238. eset see section 3 5 31 or the commands from the Plot tool bar see section 4 4 Use the View menu to switch among the multiple open windows see View 1 2 command section 3 7 6 3 4 2 Open a New Model Node Plot Select Model from the Plot gt Nodes submenu Shortcuts none This option shows a graph of all the nodes in the model The user must first save the model using the SAVE command The color of the interaction nodes is always red while the user has 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 40 ACS SASSI PREP User Manual 41 the ability to change the color of the other nodes in the model Left Mouse Button Rotate model around center of mass Middle Mouse Button Move model across screen Right Mouse Button Zoom in out on the model Also Keyboard Buttons have been enabled to give the user a more precise control of rotation Insert Delete Rotate around the X axis Home End Rotate around the Y axis Page Up Page Down Rotate around the Z axis Use this command to open a new window containing the Model Plot You may change the drawing options using the following commands Options Window Settings see section 3 5 15 Options Colors see section 3 5 21 Options Font see section 3 5 29 The Print command has been disabled for this window However if the user wants to print data in this window the use of the Export Image command is suggested se
239. ew or Model Open commands see sections 3 1 1 and 3 1 5 or when the user closes the application 5 1 36 Set the Fourier Spectrum Output Options for ACS SASSI SOIL Module SFOU lt layer gt lt out gt lt Save gt lt outcrop gt lt smooth gt lt nrval gt defines the Fourier spectrum output options for ACS SASSI SOIL module lt layer gt sublayer number lt out gt output option 0 no computation 1 computation lt save gt save option 0 disabled 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 174 ACS SASSI PREP User Manual 175 1 enabled lt outcrop gt outcrop option 0 disabled 1 enabled lt smooth gt number of times to be smoothened lt nrval gt number of values to be saved Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 7 5 1 37 Define the Analysis Options for ACS SASSI SITE Module SITE lt opmode gt lt mode1 gt lt fstep gt lt nl gt lt hs gt lt mode2 gt lt wopt gt lt freq1 gt lt freq2 gt lt cl gt lt cm gt lt delt gt lt nft gt lt freq gt defines the analysis options for ACS SASSI SITE module lt opmode gt _ operation mode 0 complete solution 1 data check only lt mode1 gt mode 1 switch 0 skip 1 write lt fstep gt frequency step lt nl gt num
240. ffness Matrix 200 53 34 Eist MaM PIOPGM A e E aa aa a a Eaa Ea were A RA EEEa AE EE EAA ue eels 201 5 3 35 Set Terms for Matrix Property Mass Weight Matrix ccceeeeeeeeeeeeeeeees 201 5 3 36 Set Terms for Matrix Property Real Part of Stiffness Matrix eeee 201 5 3 37 Define a Real Property cccccccccccceeeeeeeeeeeeeeeeeeeeeeeeeesseaaeaaeeeeeeeseeesennaeeeeees 201 5 3 38 Set Active Real Spring Matrix Property INdeX c seeeeeeeeeeeeeeeeeeeeeeeeees 202 53 39s LISt Gal PRODRUGS A el paren E E EEEE 202 5 3 40 Set Element Real Spring Matrix Property INdeX ccccceeeeeeeeeeeeeeeeeeeeeeees 203 5 3 41 Define a Spring PrOBEMYs xccedehsisossnace Keertecsscheh hep cepmneny tensa cepenensiepeeneenmeneeed 203 5 3 425 List Spring Propere S e eect re ct ectemettereaniti cater E KE E E RE En ty 203 5 3 43 Set Thickness for SHELL Elements cceeeeeeeeeccceeeeeeeeeeeeeeeeeeeeeeeeeeaeaaeees 203 Dk LOAD INSTRUCTIONS sx atotici ee eaaa a e a a aa e a aa aa Eae Eaa aa aAa 204 F a al ses lO 1 A A A E T 204 542 Delete Force SAna a aa sep neh a Ea aaia 205 BA Be ISH m01 O SLEA AT 205 5 4 4 Modify a FOrCe seesseesenenneeeseessrerrrrrtssetrrtrnnnttesetrtrtnnnnntnsetrtnttnntneseertn tees act fe 205 5 4 5 Read Forces from Filerna thnaa a ele ct ele i cheat Weta at Stabe Ss celine 205 5 46 Scale FORCES rop n ce pate oe veces Seether Sener anh ee eae ce a a E E E E EE
241. figure ports using the Windows Control Panel Properties Displays a dialog box where you can make additional choices about printing specific to the type of printer you have selected Paper Size Select the size of paper that the document is to be printed on Paper Source Some printers offer multiple trays for different paper sources Specify the tray here Orientation Choose Portrait or Landscape 3 2 5 Print Active Window Select Print from the File submenu Shortcut Tool bar Use this command to the active window This command presents a Print dialog box where you may specify the range of pages to be printed the number of copies the destination printer and other printer setup options 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 29 ACS SASSI PREP User Manual 30 The following options allow you to specify how the document should be printed Printer This is the active printer and printer connection Choose the Properties button to change the printer and printer connection Properties Displays a Print Setup dialog box see section 3 2 4 so you can select a printer and printer connection Print To File Prints to a meta file using the active page options You will be prompted for the file name Print Range Specify the pages you want to print All Prints the entire document Selection Prints the currently selected text Pages Prints the range of pages you specify in the From and To bo
242. file inputs to the ACS SASSI input format pre file The ACS SASSI baseline code includes 12 SSI modules EQUAKE SOIL SITE POINT2 POINTS 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 11 ACS SASSI MAIN User Manual 12 FORCE HOUSE ANALYS MOTION STRESS RELDISP and COMBIN These are used for the SSI analysis calculations The ACS SASSI modular structure for performing SSI analysis was kept as similar as possible to the original SASSI code for the user s convenience The ACS SASSI ANSYS integration capability included in Options A and AA includes two separated interface modules called LOADGEN and SUBMODELER modules that can be launched from the MAIN module GUI The ACS SASSI fast solver code Option FS includes two separate SSI modules called HOUSEFS and ANALYSFS that replace the baseline HOUSE and ANALYS Note For option AA the HOUSEFS was modified to accommodate the ANSYS models directly and is called HOUSEFSA 1 4 FINITE ELEMENT LIBRARY For structural modeling the ACS SASSI finite element library includes e3D solid elements type SOLID e3D beam elements type BEAMS e3D plate shell elements type SHELL e2D plane strain elements type PLANE e2D membrane elements type PLANM e3D spring elements type SPRING e3D stiffness mass generalized elements type GENERAL The excavated soil volume could be modeled using the following finite element types eSOLID ePLANE The external force loads
243. fness matrix and can be suppressed at user s option ACS SASSI automatically suppresses all incompatible modes for excavated soil elements Also incompatible modes must not 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 61 ACS SASSI PREP User Manual 62 be used for solid elements with fewer than eight nodes General Elements Select the significance of the matrix for all general elements in the active model If the Weight Matrix option is set then the values entered into the matrix are considered in weight and therefore are divided by the acceleration of gravity to be converted to mass units Overwrite Masses If this option is set then the mass definition commands see MT and MR instructions sections 5 4 18 and 5 4 11 overwrite old values if they exist otherwise the new values will be added to the old ones Overwrite Forces If this option is set then the force and moments definition commands see F and MM instructions sections 5 4 1 and 5 4 7 overwrite old values if they exist otherwise the new values will be added to the old ones 3 5 2 Set the Check Options Select Check from the Options submenu Use this command to set the options for data check see CHECK instruction section 5 1 8 Check Options Ed IV Show Errors oe Break Check at 50 Messages Hel elp The following options allow you to specify the check options Show Warnings Select this option if you want the che
244. g progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI EQUAKE is correct see Options Directories command section 6 5 1 page 77 6 3 4 Run the ACS SASSI SOIL Module Select SOIL from the Run submenu Shortcuts Tool bar Keys F4 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 68 ACS SASSI MAIN User Manual 69 Use this command to run the ACS SASSI SOIL module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI SOIL will be placed in the directory of the active model If the user wishes to use formatted input files without using the pre processor do not open a model and ACS SASSI SOIL will prompt for the input and output files In this case all files generated by ACS SASSI SOIL will be placed in the directory of the ACS SASSI SOIL module While ACS SASSI SOIL is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module SOIL in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing th
245. ght 2014 by Ghiocel Predictive Technologies Inc 69 ACS SASSI MAIN User Manual 70 6 3 7 Run the ACS SASSI POINT Module Select POINT from the Run submenu Shortcuts Tool bar Keys F7 Use this command to run the ACS SASSI POINT module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 All files generated by ACS SASSI POINT will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI POINT will prompt for the input and output files In this case all files generated by ACS SASSI POINT will be placed in the directory of the ACS SASSI POINT module While ACS SASSI POINT is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 and displays the current status of module POINT in the corresponding progress bar All modules may be run automatically using the Run All Start see section 6 4 2 Note Before performing this command make sure that the path of ACS SASSI POINT is correct see Options Directories command section 6 5 1 6 3 8 Run the ACS SASSI HOUSE Module Select HOUSE from the Run submenu Shortcuts Tool bar Keys F8 Use this command to run the ACS SASSI HOUSE mod
246. ght brackets are optional Only the first four letters of an instruction name are significant and are presented in this chapter with underlined characters while the rest of them are optional and are presented here normal characters Instruction names typed at the instruction line are not case sensitive Keyboard input is presented with bold characters and program output lines are listed with normal characters for the examples throughout this section The instructions are divided into four groups general node element and load instructions WARNING In addition to the ACS SASSI PREP commands there additional new commands that are included in the SUBMODELER module Those commands are related to the SSI model checking and automatic generation of excavation volume and interaction nodes The SUBMODELER commands are required for application of the Option AA Advanced ANSYS capability The ACS SASSI ANSYS Integration Capability User Manual includes the details on the SUBMODELER module commands The SUBMODELER is capable of using all PREP commands At this time SUBMODELER it does not include any plotting capability In future versions it is likely that the SUBMODELER module will be developed sufficiently to be capable of replacing both the ACS SASSI GUI including both the PREP and MAIN modules 5 1 GENERAL COMMAND INSTRUCTIONS The general instructions are Instruction Action Description ACCIN Sets the acceleration time history input se
247. gies Inc 8 ACS SASSI MAIN User Manual 9 multiple spectral curves These post processor calculations can be done interactive or batch xiv Post SSI calculations can be performed for the SRSS superposition of the co directional effects from X Y and Z input runs for computing the ISRS maximum structural stresses forces and moments and or the maximum seismic soil pressure on walls and mat with or without including the soil static bearing pressure component These quick post SSI calculations can be done both interactive and batch The ACS SASSI NQA Version 3 0 has been tested verified documented and released under the Ghiocel Predictive Technologies Nuclear Quality Assurance Program which is in compliance with the requirements of 10 CFR50 Appendix B 10 CFR21 ASME NQA 1 ASME NQA 1 Addenda Subpart 2 7 The ACS SASSI NQA version comes with a complete set of software documentations that were developed under the quality assurance requirements of the GP Technologies NQA 1 Level Program The ACS SASSI NQA version documentation includes the user and verification manuals and the V amp V computer files for a large set of various seismic V amp V problems including shallow embedded and buried foundations rigid and flexible foundations piles subjected to various different seismic environments different surface and body seismic waves motion incoherency and directional wave passage along an arbitrary horizontal direction multiple support excitations
248. h was validated by 2007 EPRI studies TR 1015111 for stick models with rigid basemats rather than for its practicality for realistic SSI problems Print Coherence Functions not available for fast solver code Set this option to enable the printing of the computed coherence matrix versus the computed coherence matrix at all interaction nodes This option is provided for checking the numerical accuracy of the random field decomposition and evaluate the incoherent spatial mode contributions By checking this option all the cumulative modal variance contribution similar to modal mass contribution concept in structural dynamics is computed and printed in the HOUSE output The reconstructed and the given coherency matrices are printed at each frequency in the text file FILE16 This is a very large text file Use this option only if really needed Wave Passage Select this button for activating the wave passage option This selection is required for using Abrahamson models and nonuniform multiple excitation option Apparent Velocity for Line D Type the apparent velocity for line D It is used only if the wave passage option selected Angle of Line D with X Axis Type the angle of horizontal line D with the X axis if the wave passage option is enabled or directional coherency models are used Unlagged Incoherency Model Seven plane wave coherency models can be selected Type 1 1986 Luco Wong model Type 2 1993 Abrahamson model for all soil typ
249. hange the symbol color for masses by selecting the Options Colors command see section 3 5 23 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 157 ACS SASSI PREP User Manual 158 4 4 22 Show Masses in Selected Node Select from the Plot tool bar Shortcut Keys Ctrl Shift S Use this command to show the masses and their values assigned to a specific node After pressing this button move the mouse cursor over the selected node and click the left mouse button This button remains pressed until it is clicked again 4 4 23 Lock Unlock Redraw Select from the Plot tool bar Shortcut Keys Ctrl Shift P After an operation that needs re computing of the screen coordinates such as rotations zoom the time needed for window refreshing might be a long one especially when those operations are performed in a long sequence You might find it useful to deactivate the window refreshing using this button rotate or zoom the model a couple of times and then release the button by clicking it again to see the transformations 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 158 ACS SASSI PREP User Manual 159 5 INSTRUCTION SET The instructions are presented in this chapter using the Backus Naur form lt va ue gt must be replaced with the actual value number or string all other characters must be typed as they are presented Items enclosed by strai
250. he FI FSIN method only the nodes that are on the foundation soil interface are defined as interaction nodes see NT instruction section 5 2 5 Both the FV and FI methods involve inversion of a full complex symmetrical matrix as big as 3 times total number of interaction nodes For Skin Method all interaction nodes are divided into three different types namely interface nodes by boundary intermediate nodes connected directly to interface nodes and internal remaining nodes see NT instruction section 5 2 5 This method involves inversion of full complex symmetrical matrix only as big as 3 x total number of interface nodes and therefore is considerably faster WARNING Skin Method is not validated for nuclear safety related applications It is included only in the standard solver software version only for research purposes WARNING It should be noted that interaction nodes are only the nodes that belong to the excavated soil volume Acceleration of Gravity Type the acceleration of gravity The value is the same as set in the Analysis Options the SITE input window Ground Elevation Type the ground surface elevation This value is also used to determine whether an SOLID PLANE element belongs to the structure or to the excavated soil see ETYPE instruction see section 5 3 12 For SOLID PLANE elements with ETYPE 0 default value situated below ground surface the ACS SASSI PREP assumes that they are excavation volume elem
251. he SRSS approach In the fast solver to perform the restart analysis the SSI initiation run should be done with the ANALYS input option checked for Saving Restart Files However the restart database files for the fast solver are no longer the FILE5 and FILE6 with n5 and n6 extensions but the files called COOXxxx and COOTKxxx when the xxx denotes the three digits used to define the frequency order number for example COOX001 and COOTKOO1 files are required for performing restart of the 15t frequency The associated index files COOXI and COOTKI should be also present in the restart analysis working directory Also the DOFSMAP FILE90 and FILE91 files should exist in the working directory to do an ANALYS SSI solution restart Due to these name formats only the full set of all sequential SSI frequencies can be used for the SSI restart analysis using ANALYS module If user desires to use a frequency subset he needs to rename the COOXxxx and COOTKxxx files accordingly If the global unconstrained impedance analysis option is selected ANALYS also produces FILE11 that is a quite large size file this option selection is to be avoided if rigid body impedances are not needed by the user Interpolation of complex amplitude transfer functions in the frequency domain and further output requirements are handled by the modules described below Note The fast solver ANALYS can run simultaneously multiple load cases in a single run without need fo
252. he alpha parameter The alpha parameter is called directionality factor and has values between 0 and 1 The alpha parameter is used to compute the relative distances D between interaction nodes based on the relationship D 2 alpha DX 2 1 alpha DY 2 where DX and DY are the directional distances The value of alpha 0 5 that is in the center of the 0 1 interval should be used for radial non directional or isotropic coherency models The lower and upper values of alpha such as 0 1 or 0 9 correspond to directional or anisotropic coherency models in which the distances in the Y direction are weighted 3 times more than the distances in the X direction or vice versa respectively It should be noted that in the fast solver version the principal axes of the coherency ellipse in the horizontal plane could be rotated to become orthogonal to an arbitrary direction that should be selected by the user as the wave passage direction see below Angle of Line D with X axis Number of Embedment Layers Type the number of embedment layers Time Step of Seismic Motion Type the time step of control motion The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Number of Fourier Components Type the number of values to be used in the Fourier transform The value is the same as set in the Analysis Options SITE input window Frequency Set Number Type the number of the frequency set The value is the same
253. he currently selected text Pages Prints the range of pages you specify in the From and To boxes Copies Specify the number of copies you want to print for the above page range Collate Copies Prints copies in page number order instead of separated multiple copies of each page 6 2 5 Open Specified File Select 1 2 3 4 from the File submenu Use the numbers and filenames listed at the bottom of the File menu to open the last four documents you closed Choose the number that corresponds with the document you want to open 6 3 RUN SUBMENU 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 65 ACS SASSI MAIN User Manual 66 I EQUAKE Module M SOIL Module I SITE Module J POINT Module HOUSE Module J FORCE Module I ANALYS Module _PINT Module I7 COMBIN Module J MOTION Module I7 STRESS Module D ssi Demo_1 demol sdb Al 6 3 1 Run the ACS SASSI PREP Pre Processor Select PREP from the Run submenu Shortcuts Tool bar Keys F2 Use this command to run the ACS SASSI PREP pre processor The pre processor inherits the active model Note Before performing this command make sure that the path of ACS SASSI PREP is correct see Options Directories command section 6 5 1 page 77 6 3 2 Run the Converter 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 66 ACS SASSI MAIN User Manual 67 5 Prep File Co
254. he nodes are the same have the same coordinates or are collinear e Check all node numbers and the coordinates of all nodes for the specified element Error 10 Element lt e gt Group lt g gt Has Improper Release Code e This error occurs when a component of end release code is set to 1 and the corresponding component of the J end release code is also set to 1 e Check and J end release codes and modify one of them with the KI or KJ instructions see sections 5 3 18 and 5 3 19 Error 11 Zero Area for Element lt e gt Group lt g gt e This error occurs for four node elements when some of the nodes are collinear or the same e Check all four nodes an their coordinates 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 212 ACS SASSI PREP User Manual 213 Error 12 Warped Element lt e gt Group lt g gt e This error occurs for four node elements when not all four nodes are in the same plane e Check all four nodes and their coordinates Error 13 Material lt m gt Is not Defined e One of the model s elements uses material lt m gt which is not defined e Check the elements for material soil layer indices check element type or define material lt m gt use instruction M see section 5 3 23 Error 14 Elasticity Modulus from Material lt m gt Is Illegal e The elasticity modulus from material lt m gt has a negative or zero value e Correct the elasticity modulus from the
255. he point load applied at the surface of the layered system and on the layer interfaces below the ground surface The maximum number of layers that the structure is embedded into the ground determines how deep the point loads are applied below the ground surface The following options allow you to specify the analysis options for ACS SASSI POINT module Operation Mode Select the operation mode from Solution and Data Check Last Layer Number in Near Field Zone Type the last layer number This parameter is the maximum number of layers in the 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 74 ACS SASSI PREP User Manual 75 ground that the structure including the irregular soil zone is embedded into The smaller this number the less information is saved in FILE3 therefore less computation and disk memory will be needed to form the flexibility matrix in the ACS SASSI ANALYS module However this number must be large enough to ensure that the excavated soil region will not extend deeper than the specified layer number For surface structures without assumed irregular soil zone set this value to 0 or leave the edit box blank Radius of Central Zone Type the radius of the central zone in the point load solution The value must be positive and non zero The value of this parameter depends on the geometry of the finite element mesh in vertical and horizontal direction For relatively uniform meshes in the horizont
256. herency Input C Quadratic For surface foundations the FV and FI methods are identical The Fl method can be applied with the interaction nodes either defined on the foundation soil interface called FI FSIN equivalent to Subtraction method SM or on the excavation volume lateral surface outer surface called FI EVBN equivalent to Modified Subtraction method MSM WARNING The Skin Method is not recommended and was not V amp V ed For most of the practical situations that include typical embedded nuclear island models we recommend FI EVBN MSM For deeply embedded SSI models we recommend the Fast FV method The FI EVBN is not recommended for deep embedments WARNING If Fl or FFV methods are used then sensitivity studies against the FV method are required These sensitivity studies are recommended by the ASCE 04 2014 standard and the recent USNRC SRP 3 7 2 Please see ACS SASSI MAIN user 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 82 ACS SASSI PREP User Manual 83 manual Sections 1 5 1 and 4 1 2 for more details on the application of the ACS SASSI SSI substructuring methods Thus for the FV method all the nodes that are in the excavated soil volume are defined as interaction nodes see INT instruction section 5 2 5 For the FI EVBN method only the nodes that are on the lateral surface of the excavated volume are defined as interaction nodes see NT instruction section 5 2 5 For t
257. highly numerically efficient stochastic approach that was considered as the reference approach in the 2006 2007 EPRI reports The stochastic approach is based on a 1997 EPRI report Tseng and Lilahanand 1997 ACS SASSI includes a total of six plane wave incoherency models incorporated in the code the Luco Wong model 1986 Luco and Wong 1986 Model 1 theoretical but unvalidated in practice and five Abrahamson models empirical based on seismic dense array records Models 2 through 6 1993 and 2005 models for all sites and surface foundations Abrahamson 1993 and 2005 Models 2 and 3 respectively 2006 model for all sites and embedded foundations Abrahamson 2006 Model 4 2007 model for hard rock sites and all foundations and 2007 model for soil sites and surface foundations Abrahamson 2007 Models 5 and 6 respectively and the user defined coherency model Model 7 It should be noted that at this time only the 2007 Abrahamson for hard rock site conditions is accepted by US NRC ISG 01 2008 For all SSI applications but especially for those applications with larger size flexible foundation SSI models we recommend the use of stochastic approach that is both accurate and numerically efficient and also more informative for the analyst includes statistical variation information The AS and SRSS deterministic approaches are both approximate and with limited application to rigid foundation SSI models as validated by the EPRI
258. hnologies Inc 117 ACS SASSI PREP User Manual 118 Options aS Fa EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Reference Location and Direction Complex TF File Name 00001TR_X TFI Output Control I Save Rel Disp Complex TF Acceleration Time History Data Nodal Output Data Nr of Fourier Components Time Step of Control Motion 0 Multiplication Factor ahh Max Value for Time History 0 1 First Record fo Last Record 0 Title RG1I60X w b Fle DAssi Demo_1 RG160X acc 4 I File Contains Pairs Time Step Accel Add Edit Delete Post Processing Option IV Save Relative Displacement in all nodes Restart for Frame Generation Save Rotation for ANSYS V11 0 Reference Location And Direction Use the reference location and direction for the reference node DOF Input the reference node transfer function file TFI file for reference node DOF for the calculation of the relative displacements in other nodes for the same DOF This implies that RELDISP needs to be run six times to get all the six DOF relative displacement components For all six DOFs the reference TFI extension file names should include in i all six DOFs namely TR_X TR_Y TR_Z R_XX R_YY R_ZZ To compute relative displacement with respect to free field input motion the reference TFI files should be developed by the user For incoherent motions the reference TFI ph
259. hosen element will be deselected and you can see the elements behind it This procedure holds a queue of 20 elements If you want to re select the last deselected elements from the active Model Plot window press the Alt and Backspace keys until all chosen elements reappear in the active window 3 5 31 Reset the Selection for the Active Model Plot Window Select Reset Plot from the Options submenu Use this command to reset the element selection altered by the Options Select Plot command see section 3 5 30 3 6 WINDOW SUBMENU 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 136 ACS SASSI PREP User Manual 137 ACS SASSI Prep Model File Batch Plot Options WWvGhi view Help ajas oO SEINE as Tile erticaly Z FMOD gt Cascade Arrange Icons alali alae mj BABE Be ala ap Output Close All No active database Arrange windows as horizontal non overlapping tiles 3 6 1 Arrange Windows in Horizontal Non Overlapped Tiles Select Tile Horizontally from the Window submenu Use this command to horizontally arrange multiple opened windows in a non overlapped fashion 3 6 2 Arrange Windows in Vertical Non Overlapped Tiles Select Tile Vertically from the Window submenu Use this command to vertically arrange multiple opened windows in a non overlapped fashion 3 6 3 Arrange Windows in an Overlapped Fashion Select Cascade from the Window submenu Use
260. i D Brown N and Zhang J J 2010d EPRI AP1000 NI Model Studies on Seismic Structure Soil Structure Interaction SSSI Effects Proceedings of the OECD NEA SSI Workshop Ottawa October 6 8 Ghiocel D M Stoyanov G Adhikari S and Aziz T 2010e Seismic Motion Incoherency Effects for CANDU Reactor Building Structure Proceedings of the OECD NEA IAEA SSI Workshop Ottawa October 6 8 Ghiocel D M Li D Tunon Sanjur L 2009a Seismic Motion Incoherency Effects for AP1000 Nuclear Island Complex The 20th Structure Mechanics in Reactor Technology Proceedings of SMiRT20 Conference Paper 1852 Helsinki August 14 18 Ghiocel D M Short S and Hardy G 2009b Seismic Motion Incoherency Effects on SSI Response of Nuclear Islands with Significant Mass Eccentricities and Different Embedment Levels The 20th Structure Mechanics in Reactor Technology Proceedings of SMiIRT20 Conference Paper 1853 Helsinki August 14 18 Ghiocel D M 2007a Stochastic and Deterministic Approaches for Incoherent Seismic SSI Analysis as Implemented in ACS SASSI Appendix C Electric Power Research Institute Palo Alto CA and US Department of Energy Germantown MD EPRI Report TR 1015110 November Ghiocel D M And Ostadan F 2007b Seismic Ground Motion Incoherency Effects on Soil Structure Interaction Response The 19th Structure Mechanics in Reactor Technology Proceedings of SMiRT19 Conference Paper K05 4
261. i e for the first row use lt t1 gt lt t12 gt for the second row lt t1 gt lt t11 gt and for the last row lt row gt 12 only lt t1 gt A 10 Node K A 7 Y N gt gt 6 8 1 A Node J A 1 gt gt 5 Node 1 4 N Figure 5 5 GENERAL element and corresponding matrix property 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 200 ACS SASSI PREP User Manual 201 5 3 34 List Matrix Property MXLIST lt p gt lists the matrix property lt p gt the real and imaginary parts of the stiffness matrix and the mass weight matrix 5 3 35 Set Terms for Matrix Property Mass Weight Matrix MXM lt p gt lt row gt lt t1 gt lt t2 gt lt t12 gt sets the terms belonging the mass weight matrix of matrix property lt p gt row lt row gt to lt t1 gt lt t12 gt If the matrix property lt p gt does not exist it will be created by this command Since the matrix is upper diagonal enter only the required number of terms from the diagonal to the right i e for the first row use lt t1 gt lt t12 gt for the second row lt t1 gt lt t11 gt and for the last row lt row gt 12 only lt t1 gt Note Enter the terms in mass or weight units as set from the Options Model menu command see section 3 5 1 5 3 36 Set Terms for Matrix Property Real Part of Stiffness Matrix MXR lt p gt lt row gt lt t1 gt lt t2 gt lt t12
262. i trad ead Parad aE AN eet 84 oid 212 i219 2 O12 Sweeper Rei er ie mee rene MOR CSM PURO ROOTES MeO Nee ROR eS Ment aN C ION EROS MAT EDEN URE RT AON ENT OnE Fret teat 85 Copyright 2014 by Ghiocel Predictive Technologies Inc 3 ACS SASSI MAIN User Manual 4 1 INTRODUCTION ACS SASSI Version 3 0 is a state of the art highly specialized finite element computer code for performing 3D linear and non linear soil structure interaction SSI analysis for shallow embedded deeply embedded and buried structures under coherent and incoherent earthquake ground motions The ACS SASSI software is an extremely user friendly modern engineering software under MS Windows with a unique suite of SSI engineering capabilities ACS SASSI is equipped with two translators for converting inputs of structural finite element models from ANSYS CBD file ANSYS is a trademark of ANSYS Inc or original SASSI or SASSI2000 fixed format input files to ACS SASSI and also from ACS SASSI to ANSYS APDL input file format ACS SASSI uses an automatic management of all data resources files directories and interconnections between different software modules ACS SASSI can be run interactively for a single SSI model or batch for single and multiple SSI models In ACS SASSI Version 3 0 the size of the SSI problems that can be solved are finite element FE models with 100 000 nodes The ACS SASSI Version 3 0 has two solution implementations with very different computationa
263. iderations in section 1 5 the user should also consider the following SSI modeling aspects 1 Rigid vs Flexible Basement Flexible basement is always assumed in the code As a result no saving is obtained if the rigid basement assumption is used It is therefore recommended to carry out the analysis for actual properties of the basement If it is necessary to evaluate the effect of rigid basement assumption a restart analysis can be performed by selecting a longitudinal elastic modulus for basement to be 10 and 10 times the elastic modulus of the soil 2 Surface vs Embedded Structure It is possible to treat the embedded structure as surface structure if the embedment effects are not significant on the SSI response of interest By doing neglecting embedment a large run time saving can be achieved for solving SSI problem The number of interaction nodes is largely reduced for surface foundations 3 2D SSI vs 3D SSI The 2D SSI analysis are not recommended for soil sites due to their inability to model correctly the complex dynamic stiffness of the foundation for both surface and embedded models Their use should be justified by the analyst The 2D SSI models could be acceptable for rock sites for which SSI effects are highly reduced 4 Coherent vs Incoherent Motion The ACS SASSI code has the capability to consider incoherent motions for seismic analysis The incoherent motion effects are induced by the fact that the seismic so
264. ifies a soil layer section 5 3 26 MODM Modifies a material section 5 3 27 MODR Modifies a real property section 5 3 28 MODSC Modifies a spring property section 5 3 29 MSET Sets element material soil layer index section 5 3 30 MTYPE Modifies the group type section 5 3 31 MXDEL Delete matrix properties section 5 3 32 MXI Set terms for matrix property section 5 3 33 imaginary part of stiffness matrix MXLIST List matrix property section 5 3 34 MXM Set terms for matrix property mass section 5 3 35 weight matrix MXR Set terms for matrix property real part section 5 3 36 of stiffness matrix R Defines a real property section 5 3 37 RACT Sets active real spring matrix section 5 3 38 property index RLIST Lists real properties section 5 3 39 RSET Sets element real spring matrix section 5 3 40 property index SC Defines a spring property section 5 3 41 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 189 ACS SASSI PREP User Manual 190 Instruction Action Description SCLIST Lists spring properties section 5 3 42 THICK Sets thickness for SHELL elements section 5 3 43 5 3 1 Delete Soil Layers DELL lt m1 gt lt m2 gt lt inc gt deletes the soil layers with index from lt m1 gt to lt m2 gt default value lt m1 gt with step lt inc gt default 1 5 3 2 Delete Materials DELM lt m1 gt lt m2 gt lt inc gt deletes the materials with index from lt m1 gt to
265. il and Structure FE Model Discretization In order to accurately transmit the seismic waves the FE model should be discretized so that the largest size of each element does not exceed A 5 where A is the shortest wavelength of interest in the SSI analysis This shortest wave corresponds to cut off frequency of the SSI analysis Since the mass matrix computation in the code consists of 50 lumped mass and 50 consistent mass the A 5 criteria can be used in constructing the SSI models The 1 5 wavelength criterion is important for sizing the soil layers and the structure and excavation volume elements in the vertical direction This criterion is appropriate for the vertical element sizes if seismic input consists of vertically propagating waves For the excavated soil horizontal mesh size the 1 5 wavelength criterion could be restrictive depending on a case by case basis Inside the excavated soil volume due to wave scattering effects there is a mixture of incident body waves and scattered body waves and surface waves Since the surface waves in a viscoelastic half space have a horizontal propagation with a traveling speed that is relatively close to shear wave speed the excavation horizontal mesh size should be equal to the vertical mesh size However in practice the horizontal mesh size can be slightly relaxed Often reasonably accurate SSI results could be obtained for horizontal mesh sizes that are about 1 2 1 5 or even twice times larger tha
266. il motion at the structure soil interface level has not identical motions in all points Until recently the incoherent motion effects were ignored It has been shown that the incoherent motion effects may affect the seismic response of large 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 41 ACS SASSI MAIN User Manual 42 foundation size buildings such as those of nuclear power plants The default SSI analysis type corresponds to the coherent seismic motion case as usually considered in the past SSI analysis The incoherent seismic motion option is limited to 3D models Quarter models and half models and 2D SSI models are not permitted The ACS SASSI code can consider both the seismic motion incoherency and directional wave passage effects Both stochastic and deterministic incoherent SSI approaches could be employed These incoherent SSI approaches have been validated by 2006 2007 EPRI studies Short et al 2006 2007 and have been endorsed by US NRC ISG 01 2008 for application to advanced nuclear reactors for computing incoherent ISRS Additional information on these incoherent SSI approaches could be find in other publications Ghiocel 2007 2009a 2009b 2013b The ACS SASSI code includes six incoherent SSI approaches namely five simplified deterministic approaches based on the AS and SRSS approaches that two of them were benchmarked in the 2006 2007 EPRI reports and a rigorous but still
267. impedance matrix by the free field motion vector For forced vibration analysis the load vector is formed directly from the given nodal external forces 6 Solution of linear complex equation system The transfer function matrix is determined by solving linear system This matrix corresponds to total acceleration transfer functions for seismic analysis and total displacement transfer functions for forced vibration analysis 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 25 ACS SASSI MAIN User Manual 26 3 DESCRIPTION OF SSI MODULES In this section we describe the functionality of the 12 SSI modules used for the main SSI analysis calculations 3 1 SEISMIC INPUT SITE RESPONSE AND SSI ANALYSIS MODULES Short descriptions of the SSI module functionalities are provided in the following 1 Module EQUAKE The EQUAKE module generates earthquake acceleration time histories that are compatible with given seismic design ground response spectra The EQUAKE module combines both frequency domain and time domain algorithms to generate the spectrum compatible accelerograms The frequency domain matching algorithm is based on the Levy Wilkinson LW algorithm while the time domain matching algorithm is based on the Abrahamson AB algorithm implemented in the RspMatch code The LW algorithm is used first to get a RS approximation and then the AB algorithm is used to improve accuracy of the computed RS to the targe
268. in the bar menu select the Model Open Database menu command 3 Adialog box appears in which under the File Name you have to fill the chosen name for this new database in this case test2 sdb The model database is a binary file containing model information The file may have any extension Open SASSI database Save in E Sassi File name models sdb Save as type SASSI databases sdb hd Cancel Click OK Click OK in the following dialog box to create the model database SASSI MAIN Gi Database does not exist Create jJ m 4 Select the Run PREP menu command 5 The window of the ACS SASSI PREP module opens select Model New 5 GETTING STARTED Copyright 2014 by Ghiocel Predictive Technologies Inc 53 ACS SASSI MAIN User Manual 54 6 In the opened dialog box type the model name full path and description as shown New Model Model Name moden Model Path a sassi models modell Help Model Title ftest model 1 Database D SASSI models sdb gt The new model name will be model1 and d sassi models model1 is the directory where all files of the model will be stored x i Cancel 7 Click OK 8 At the ACS SASSI PREP instruction line type the input instruction NP followed by the file which contains all input data of the model you want to create including the path as shown below ACS SASSI PREP sl x Model Open Options Window View Help
269. incoherent motion option for describing seismic random field input motion environment The wave passage effects can be also included Technical details on the ACS SASSI incoherent SSI analysis methods could find in 2006 2007 EPRI reports Short et al 2006 2007 Ghiocel 2007a and in other papers Ghiocel 1998 Ghiocel et al 2007b 2009a and 2009b 2013b 2 3 IMPEDANCE ANALYSIS As previously stated the impedance matrix represents the dynamic stiffness of the foundation at the interaction nodes Thus the impedance matrix is determined as the inverse of the dynamic flexibility compliance matrix The flexibility matrix is a full symmetric complex matrix and an efficient in place inversion subroutine is currently used for such operation An alternate SSI substructuring method that was used in a more distant past and is also less accurate than the FV and FI methods is the Skin Method In this method the interaction nodes are grouped into three different categories namely interface intermediate and internal nodes By definition interface nodes are nodes which lie along the physical boundaries between the structure and the soil region labeled by number 1 in Figure 2 3 Intermediate nodes are defined as those interaction nodes which are directly connected to interface nodes labeled by number 2 in Figure 2 3 The remaining interaction nodes are internal nodes labeled by number 3 in Figure 2 3 WARNING The Skin Method is not inclu
270. ing global mass and stiffness matrices These matrices are stored in compacted blocks in preparation for solution by the active column method later in the ACS SASSI ANALYS module The results are written to FILE4 WARNING For SSI models including shell elements we recommend the use of the FIXROT or FIXSHLROT commands included in the SUBMODELER module Please see ACS SASSI ANSYS Integration Capability User Manual for details on the SUBMODELER module and the FIXROT and FIXSHLROT commands WARNING We recommend the use of the FIXEDINT and HINGED commands included in the SUBMODELER module to check the SSI model before any final analysis is performed Please see ACS SASSI ANSYS Integration Capability User Manual for details on the SUBMODELER module and the FIXEDINT and HINGED commands If the Skin Method is to be used with the baseline version with the standard solver code for the computation of the impedance matrix the excavated soil elements are once again assembled but this time in a different format in order to form the global matrices M 2 and Ki2 The columns of these matrices follow the same order as the degrees of freedom to be used later to form the flexibility matrix F12 thus making it possible to carry out the matrix operation efficiently The matrices M12 and Ki2 are full matrices which are stored in blocks and then are written to File4 for interactive version File4 is named modelname with extension N4 WARNI
271. inimum and maximum is reset for each time history file processed Batch Frame Selection file Format Line 1 Number of Files of Min Max to look for peaks 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 33 ACS SASSI PREP User Manual 34 Lines 2 Number of Files Name of the files to be searched Input Example 10 80 00001TR_X acc 00002TR_X acc 00003TR_X acc 00004TR_X acc 00005TR_X acc 00006TR_X acc 00007TR_X acc 00008TR_X acc 00009TR_X acc 00010TR_X acc This input will search the ten files listed for frames with values more than 80 of the maximum value 3 3 5 Frame Combination This function will combine data from different contour plot frames together using a batch file The batch file is specified by he user an has the ability to combine data using summation average and SRSS Frame Combination File Format Line 1 Number of Operations Lines 2 N Operation block 1 Operation block Line 1 Number of Files Operation Code Output Filename Operation block Lines 2 Number of Files Input Filename Lines N M Operation block 2 Operation Selection codes SRSS 0 Sum 1 Average 2 Input Example 3 3 0 RS_Combine RS 00001TR_X RS 00001TR_Y RS 00001TR_Z RS 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 34 ACS SASSI PREP User Manual 35 3 1 TH _Combine ACC 00001TR_X ACC 00001TR_Y ACC 00001TR_Z
272. ion 3 5 7 5 1 33 Set the Response Spectrum Output File for ACS SASSI EQUAKE Module RSOUT lt no gt lt file gt sets the response spectrum output file number lt no gt for ACS SASSI EQUAKE module to lt file gt Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQAUKE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 7 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 173 ACS SASSI PREP User Manual 174 5 1 34 Set the Acceleration Output Options for ACS SASSI SOIL Module SACC lt layer gt lt opt gt lt outcrop gt defines the acceleration output options for ACS SASSI SOIL module lt layer gt sublayer number lt opt gt output option 0 no computation 1 compute maximum 2 compute maximum and save time history lt outcrop gt outcrop option 0 disabled 1 enabled Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 7 5 1 35 Save Active Model SAVE saves the active model s data needed for later resuming or loading in a next working session ACS SASSI PREP automatically saves the data from the active model when a new model is activated through the NEW or ACT instructions see sections 5 1 25 and 5 1 3 or through the Model N
273. ion4ACSSASSIV2304 07 29 IQUEF Modul gt gt gt gt SITE Module D ACSY2300 ption4 ACSSASSIV2304 07 29 POINT Module D ACSY2300 ption amp ACSSASSIV2304 07 29 HOUSE Module D ACSY2300 ption ACSSASSIV2304 07 29 gt gt gt gt gt gt FORCE Module D ACSV2300ptionA ACSSASSIV2304 07 29 gt gt ANALYS Module D ACSV2300 ptionA ACSSASSIV2304 07 29 COMBIN Module D ACSV2300ptionA ACSSASSIV2304 07 29 gt gt MOTION Module D ACSY2300 ptionAACSSASSIV2304 07 29 gt gt gt gt STRESS Module DACSY2300 ption amp ACSSASSIV2304 07 29 gt gt BATCH Module D ssi acs_sassi disks motion exe Vv bea RELDISP Module D ssi ACS_SASSI disks reldisp 2304 exe LOADGEN Module D ACSV 2300 ption amp ACSSASSIV2304 07 29 gt gt oh Zan 07 vaa a ca ere cons ar a E ks e pacea Tse soc EET Ee EEEE gt SEY aS ES SSS SSeS Ge pe ie PAAS SA a ESO OLS SACS Y Za ie AES oes SIV e gt gt 6 5 2 Set Input and Output Files for ACS SASSI Modules Select Files from the Options submenu Use this command to set the postfixes and or extensions for the input and output files for the ACS SASSI modules using the Analysis Files dialog box Select the tab index of the desired module and type the postfixes and extensions for the input and or output file The input and output files will be placed in the model directory and the file names are obtained by appending the postfix to the model name The in
274. is command make sure that the path of ACS SASSI SOIL is correct see Options Directories command section 6 5 1 page 77 6 3 5 Run the ACS SASSI LIQUEF Module The LIQUEF module is not included in this version 6 3 6 Run the ACS SASSI SITE Module Select SITE from the Run submenu Shortcuts Tool bar Keys F6 Use this command to run the ACS SASSI SITE module for the active model see Model Open Model command section 6 1 2 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 All files generated by ACS SASSI SITE will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI SITE will prompt for the input and output files In this case all files generated by ACS SASSI SITE will be placed in the directory of the ACS SASSI SITE module While ACS SASSI SITE is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 and displays the current status of module SITE in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 Note Before performing this command make sure that the path of ACS SASSI SITE is correct see Options Directories command section 6 5 1 6 MENU COMMANDS Copyri
275. k e Set the acceleration output file lt i gt or deselect the acceleration input option by selecting the Options Analysis command see section 3 5 3 Error 89 Number of Frequencies Does Not Match RS Input File lt i gt e The number of records from the spectrum input file lt i gt for ACS SASSI EQUAKE module is not equal to the number of frequencies e Change the number of frequencies or change the spectrum input file lt i gt by selecting the Options Analysis command see section 3 5 3 Error 90 Illegal Initial Random Number e The initial random number for ACS SASSI EQUAKE module is less or equal to zero e Correct the initial random number by selecting the Options Analysis command see section 3 5 3 Error 91 Illegal Number of Frequencies 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 225 ACS SASSI PREP User Manual 226 e The number of frequencies for ACS SASSI EQUAKE module is less or equal to zero e Correct the number of frequencies by selecting the Options Analysis command see section 3 5 3 Error 92 Illegal Duration e The total duration for ACS SASSI EQUAKE module is less or equal to zero e Correct the total duration by selecting the Options Analysis command see section 3 5 3 Error 93 No Correlation Factors Defined e The correlation factors for ACS SASSI EQUAKE module are not defined e Define the correlation factors or deselect the correlation option
276. k appears next to the menu item when the Check Errors window is displayed CHECK Errors amp Warni Ed 5 ERROR 19 Soil layer 0 is not defined Module SITE ERROR 44 Frequency set 0 is not defined Module SITE ERROR 51 All wave fields are deselected Module SITE ERROR 53 Illegal value for frequency 1 Module SITE ERROR 55 Illegal sum of wave ratios at frequency 1 Modu ERROR 55 Illegal sum of wave ratios at frequency 2 Modu ERROR 57 Illegal radius of central zone Module POINT ERROR 01 Illegal acceleration of gravity Module HOUSE x b To display the message explanation and possible correction actions double click the left mouse button over the error warning message or press F1 Options for the error warning display may be customized using the Options Check command see section 3 5 2 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 139 ACS SASSI PREP User Manual 140 3 7 2 Show Hide the Plot Info Window Select Plot Info from the View submenu Use this command to display or hide the Plot Info window To request information about an element from the active Model Plot window move the mouse cursor over the selected element and press the right mouse button Information about the selected element will be listed at the bottom of the Plot Info window ACS SASSI PREP Iof x Model File Plot Options Window View Help 9 elos x aele KZ A srove gt Slaef 4
277. ke sure that the path of ACS SASSI STRESS is correct see Options Directories command section 6 5 1 page 77 6 3 15 Run the ACS SASSI RELDISP Module Select RELDISP from the Run submenu Shortcuts None Use this command to run the RELDISP module 6 3 16 Run the ACS SASSI ANSYS Interfacing Modules Select one of the three ANSYS interface options from the ACS SASSI MAIN Run submenu These options are provided only for the Option A ugrade Details for the ANSYS interface options are provided in a separate manual Shortcuts None Use this command to run the RELDISP module 6 3 17 Run the ACS SASSI BATCH 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 74 ACS SASSI MAIN User Manual 75 Select BATCH from the Run submenu Shortcuts None Use this command to run a windows batch file bat from the ACS SASSI MAIN GUI The user can set up a batch run of the program modules by using the windows batch format This Menu option provides a continent place for the user to run the batch file Note Before performing this command make sure that the path of batch file is correct see Options Directories command section 6 5 1 page 77 6 4 RUN ALL SUBMENU giel SE Sa ans Stop Giri ii T EQUAKE Module D SASSI models sdb kZ 6 4 1 Set the Modules to Be Run Automatically Select Options from the Run All submenu Shortcut Tool bar e 6 MENU COMMANDS Copyright 2
278. l at different angles The mouse is used to move the model by using a click and drag method The user will click on the plot window with one of the mouse button then drag the mouse across the window The action the program will take is determined by which mouse button is pressed Left Mouse Button Rotate model around center of mass Middle Mouse Button Move model across screen Right Mouse Button Zoom in out on the model Also Keyboard Buttons have been enabled to give the user a more precise control of rotation Insert Delete Rotate around the X axis 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 53 ACS SASSI PREP User Manual 54 Home End Rotate around the Y axis Page Up Page Down Rotate around the Z axis You may change the drawing options using the following commands Options Window Settings see section 3 5 20 Options Colors see section 3 5 28 or Options Font see section 3 5 29 The Print command has been disabled for this window However if the user wants to print data in this window the use of the Export Image command is suggested see section 3 2 2 TFANI File Extension Frame List Format TFANI is the file extension for the inputs for the vector TF plot The TFANI format specifies the data that is to be loaded by PREP for the animation The file begins with the first line Start Frame End Frame and the Frame Stride The next line is the Directory name
279. l has no forces or moments for the FORCE module e Define a set of forces or moments using the F or MM instructions see sections 5 4 1 and 5 4 7 Error 62 Node for Force Moment lt i gt is not defined e Your model has a force moment on an undefined node e Define the node using the N instruction see section 5 2 10 or delete the force moment using the FDEL or MMDEL instructions see sections 5 4 2 and 5 4 8 Error 63 Illegal Coordinate Transformation Angle e The coordinate transformation angle is not in the range 0 360 degrees e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 64 No Nodal Output Request e There are no node lists for output defined e Add some node lists by selecting the Options Analysis command see section 3 5 3 Error 65 Illegal Nodal Output Request lt n gt e One of the defined node lists for output requests contains the illegal node number lt n gt explicitly or contained in a range e Correct the node list by selecting the Options Analysis command see section 3 5 3 Error 66 Nodal Output Request Defined More Than Once lt n gt e The defined node lists for output requests contain the node number lt n gt more than once explicitly or contained in a range e Correct the node lists by selecting the Options Analysis command see section 3 5 3 Error 67 Illegal Output Time History Step 6 ERRORS AND WARNINGS Copyright 201
280. l it is clicked again To reset the view click the Reset Zoom and Reset Center buttons see sections 4 4 9 and 4 4 11 4 4 9 Reset the Model Size Select from the Plot tool bar 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 152 ACS SASSI PREP User Manual 153 Shortcut Keys Ctrl numeric keypad Click this button to reset the model size to the initial one after clicking one of the Zoom In or Zoom Out buttons see sections 4 4 6 and 4 4 7 4 4 10 Set the View Center Select from the Plot tool bar Shortcut Keys Ctrl C Click this button to set a new center for the model s view in the active window While the button remains pressed click with the right mouse button over the new drawing center and the clicked point will become the new drawing center All later zooming and rotation operations will be performed while taking the new view center into account The center button remains pressed until it is clicked again 4 4 11 Reset the View Center Select from the Plot tool bar Shortcut Keys Ctrl Shift C Click this button to reset the drawing s center to the initial one after clicking the Set Center button see section 4 4 10 4 4 12 Switch Hidden Lines On Off Select from the Plot tool bar Shortcut Keys Ctrl H This button is a switch between the hidden line surface plotting and line plotting algorithms If the button is pressed the surfaces will be
281. l speeds These two solvers are i the standard solver and ii the newer parallel fast solver The fast solver FS is tens to hundreds of times faster than the standard solver also used by the university SASSI2000 code The standard solver code was tested for complex 3D SSI models with sizes up to 25 000 nodes and up to 5 000 interaction nodes on 16 GB RAM workstations The fast solver that is much faster was tested for much larger size 3D SSI models with up to 100 000 nodes and 35 000 interaction nodes on 192 GB RAM workstations running under MS Windows 7 or 8 The ACS SASSI Version 3 0 fast solver is about 2 3 times faster than the previous ACS SASSI Version 2 3 0 fast solver The fast solver does not need any SSI restart analysis for the three directional seismic input components since it solves the X Y and Z input cases in memory without the need of writing and reading the large restart files The lack of restart analysis for performing SSI analysis for multiple seismic inputs implies that for the incoherent SSI analysis using a stochastic simulation approach the computational speed is increased by 3 times In comparison with the previous version since the incoherent SSI analysis are solved in a single restart run per incoherent sample for the three input directions instead of 3 restart runs one restart run for each input direction For external forces the new version can run 9 load cases in a single run with no restarts required Becaus
282. lements the STRESS module computes the stress force or moment components at each frequency performs interpolation and convolution with the control motion and finds the corresponding time histories by returning in the time domain using the inverse Fast Fourier Transform algorithm For nonlinear soil SSI analysis the time histories of the maximum shear stresses strains is calculated in time domain for each time interval defined by the time step From this the effective shear strain 0 60 0 65 times maximum shear strain for the soil elements can be estimated and used to define new strain compatible soil properties The following options allow you to specify the analysis options for ACS SASSI STRESS 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 108 ACS SASSI PREP User Manual 109 module Operation Mode Select the operation mode from Solution and Data Check Type of Analysis Select the type of analysis from Seismic and Foundation Vibration This option is the same as set in the Analysis Options ANALYS dialog box see section 3 5 10 Output Control Auto Computation of Strains in Soil Elements Set this option if you want STRESS to automatically compute the strains in all soil elements if secondary non linear effects are considered This option should be used together with the save option of transfer functions of forces and moments in beam elements see next two save options Save Stress Time
283. les occupy smaller memory space during the execution You may specify a new frequency set number to solve the problem for new frequencies and combine the results with those of old frequencies if the analysis demands it at a later time Since more than 90 of the execution time of all ACS SASSI modules is spent by the ANALYS module assessment of the final time of the run job can be made in advance by estimating the time of solving one single frequency and multiplying it by the number of frequencies for which a solution is desired Control Motion Foundation Reference Point This reference point is used for computing the unconstrained global impedance and or for defining the control motion location for oblique body or surface waves that are input in SITE X Coordinate of Control Point Type the X coordinate of oblique input motion control point and or the foundation reference point for unconstrained global impedance calculations Y Coordinate of Control Point 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 96 ACS SASSI PREP User Manual 97 Type the Y coordinate of oblique input motion control point and or foundation reference point point for unconstrained global impedance calculations Z Coordinate of Control Point Type the Z coordinate of foundation reference point for global foundation impedance calculations Cc Q O SE S TE g 8 po O Coordinate System Program xyz HOUSE Xyz SITE Figu
284. ling and understanding the structural dynamic behavior ix Computation and visualization of the amplitude TF or spectral accelerations for a selected damping value at a given SSI calculation frequency for the entire SSI model using either structural deformed shape or bubble plots The deformed shape plots are animated structural plots with a controlled movie frame speed so that they can be also viewed as static plots For selected resonant frequencies the spectral amplitudes or the ZPA values could be plotted as a deformed shape plot x Computation and visualization of structural acceleration and relative displacement time histories using structural deformed shape plots The deformed shape plots can be static structural plots for selected times or maximum values or structural animations of the SSI response variation in time during the earthquake action xi Computation and contour plotting of the average nodal seismic stresses for all six components in global coordinates in the entire structure or for selected parts of the structure based on the computed element center stresses for the SHELL and SOLID elements Both maximum and time varying values of nodal stresses are computed and available for plotting The approximation is based on the assumption that element center and node stresses are equal no shape function extrapolation is included For sufficiently refined finite element models this approximation appears reasonable Contour stress
285. ling the time history Use only if Max Value for Time History is blank The default is set from the active model s analysis options see above Max Value for Time History Type the maximum value of time history to be used The values of the time history will be scaled to this value Use only if Multiplication Factor is blank The default is set from the active model s analysis options see above You may change the drawing options using the following commands Options Window Settings see section 3 5 16 Options Colors see section 3 5 24 page 131 or Options Font see section 3 5 29 Use the View menu to switch among the multiple open windows see View 1 2 command section 3 7 6 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 43 ACS SASSI PREP User Manual 44 ep ne History File 00151TR_X ACC Ow Model File Batch Plot Options Window View Help amp olos xal lela KL Bl save 7 arwrrte alelet Er Alaala Ske me m e MLE Sela elle Time History 0 456412 00151TR_X ACC ii l Ihln AN Acceleration g Ni Y A 0 472841 0 1 72722 3 45444 5 18167 6 90889 8 63611 10 3633 12 0906 13 8178 Time s 3 4 4 Open TFU TFI Curves Select TFU TFI Curves from the Plot submenu Shortcuts none Use this command
286. list the Edit button to edit the elements of the selected list or the Delete button to delete the selected list Edit Element List x Element List oK f 1q Cancel Groups Type SOLID 88 32 You may use blank tab or 4 as separators for the element numbers You may use to add a set of elements to the element list Select the group from the Groups list box For each element list and for each component buttons from the Components group box select the requested output from the buttons placed in the Component Request group box NOTES The group element numbers should be defined in the ascending order For mixed models that include BEAM elements but also SOLIDS and or SHELL if the mixed STRESS output post processing is used then it should be checked against separate post processing STRESS output for the BEAM elements only There is an unconfirmed reporting that indicates that could be sometime differences in the printed maximum axial forces for the first elements of the BEAM groups if the output requests include mixed element groups vs only BEAM element groups If the nonlinear soil SSI analysis option is used then the nonlinear soil element group including all solid elements has to be selected by the user The nonlinear SSI results are saved at each iteration in FILE74 SOLID elements The available components are e Stress Strain XX Direction e Stress Strain YY Direction 3 MEN
287. ll be different than the 2007 EPRI recommended approaches and therefore most likely interpreted as unsatisfactory in the light of the current US NRC regulations US NRC ISG 01 May 2008 Smoothing Parameter The smoothing parameter is the potential spurious spectral sharp peaks and valleys that could be artificially introduced by the SASSI interpolation scheme for complex transfer functions interpolation options 0 to 5 Using the ACS SASSI special TFU TFI plotting capability the analyst can investigate the effects of interpolation error smoothing on the SSI results by comparing for selected nodes the computed and the interpolated amplitude transfer functions saved in the text files with extensions TFU and TFI The smoothing parameter values can vary typically between 10 and 1000 Sensitivity studies to evaluate the effects of the smoothing parameter value on the computed ISRS are recommended before the final smoothing parameter value is decided for SSI production runs The 2007 EPRI studies Short et al 2007 showed that for a smoothing parameter with values from 10 to 500 the ISRS results were practically the same The 2007 EPRI incoherent SSI validation report Short et al 2007 includes additional details on how to use interpolation ATF error smoothing WARNING The smoothing option should not be applied if the spline interpolation was selected The smoothing parameter should be zero if the spline interpolation is used Nodal Outpu
288. lly between 0 10 and 0 30 for distances in ft Higher values can be used to determine upper bounds of the incoherence motion effects on SSI response The incoherent motion field can be isotropic or anisotropic for horizontal components NOTE The Luco Wong model is an unit dependent model The coherence parameters should be different for distances in meters instead of feet Please see for details Luco and Wong 1986 Reference 39 Section 8 in the ACS SASSI MAIN manual Coherence Parameter Y Direction Horizontal Component Type the coherence parameter for the Luco Wong model in Y direction Not used if 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 84 ACS SASSI PREP User Manual 85 Luco Wong model is not used Coherence Parameter Z Direction Vertical Components Type the coherence parameter for the Luco Wong model in vertical direction Not used if Luco Wong model is not used SoilVelocity Alpha or Alpha Directionality Factor This input for incoherent SSI analysis is a dual input Standard solver version The input input defines the mean soil shear wave velocity used by the Luco Wong model It has to be non zero Not used for Abrahamson models No user defined option implemented Fast solver version The input input defines the mean soil shear wave velocity used by the Luco Wong model For all Abrahamson coherency models or the user defined models which are Models 2 to 7 the input parameter defines t
289. lowing computer runs a Execute the COMBIN module if necessary to combine the transfer functions obtained for different frequency subranges in Step 10 b Execute the program modules MOTION and STRESS based on the results of Step 10 and item a of this step to compute the response of the system Step 12 It is also possible at this stage to add new frequencies to the response based on the results obtained in Step 11 Step 13 Perform a restart analysis if changes in either the superstructure or the seismic environment occur In the case of forced foundation vibration problems 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 40 ACS SASSI MAIN User Manual ss si s S H a The time history of control motion in Step 1 is replaced by the reference time history of the external dynamic forces b Step 4 is of no use c The iterated soil properties in Step 5 are replaced by the initial soil properties d The site response problem is eliminated from Step 9 and second part of item a of Step 10 e Item d of Step 10 is replaced by a different analysis performed by the FORCE module to obtain the load vector on File9 which replaces File1 in item e of Step 10 f The dynamic environment in Step 13 is replaced by the external dynamic forces 4 1 2 Engineering Considerations In order to make effective use of the ACS SASSI code in addition to the cons
290. lt opt3 gt lt opt4 gt defines the stresses and strains output options for ACS SASSI SOIL module lt layer gt sublayer number lt opti gt stress computation option 0 no computation 1 computation lt opt2 gt save stress time history option 0 disabled 1 enabled lt opt3 gt strain computation option 0 no computation 1 computation lt opt4 gt save strain time history option 0 disabled 1 enabled Note This instruction is provided for input files To set the analysis options for the ACS SASSI SOIL module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 43 List General Information STATUS displays global variables and general information for the active model 5 1 44 Define Analysis Options for ACS SASSI STRESS Module STRESS lt opmodes lt iter gt lt save gt lt itran gt defines the following analysis options for ACS SASSI STRESS module lt opmode gt operation mode 0 complete solution 1 data check only lt iter gt iteration control key 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 178 ACS SASSI PREP User Manual 179 1 automatic computation of strains in all soil elements 0 otherwise lt save gt save option 1 save stress time histories to File 15 0 otherwise lt itran gt output option for transfer functions 1 output transfer functions for beam element n
291. mand see section 3 1 3 5 1 21 List Frequency Sets LFREQ lt start gt lt end gt lt step gt lists the frequency sets from lt start gt default 1 to lt end gt default last with step lt step gt default 1 5 1 22 Define Input Motion Data for ACS SASSI HOUSE Module ME lt no gt lt nfirst gt lt nlast gt lt xC gt lt yC gt lt ZC gt defines the following multiple excitation options for ACS SASSI HOUSE module lt no gt number of input motion between 1 and 10 lt nfirst gt first foundation node for input motion lt no gt lt nlast gt last foundation node for input motion lt no gt lt XC gt x coordinate of control point for input motion lt no gt lt yc gt y coordinate of control point for input motion lt no gt lt ZC gt z coordinate of control point for input motion lt no gt Note This instruction is provided for input files To set the multiple excitation analysis options for the ACS SASSI HOUSE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 169 ACS SASSI PREP User Manual 170 5 1 23 Change the Model Options MOPT lt incomp gt lt matrix gt lt mass gt lt force gt defines the following model options lt icomp gt incompatible mode for solid elements 0 include 1 suppress lt matrix gt matrix option for general el
292. mand see section 3 5 3 Error 99 Dynamic property lt p gt has no damping curve e The dynamic soil property lt p gt has no data defining the damping ratio shear strain curve e Define the damping ratio shear strain curve for the dynamic soil property by selecting the Options Analysis command see section 3 5 3 Error 100 Number of Acceleration Values Is Illegal e The number of acceleration values for ACS SASSI SOIL module is less than or equal to zero e Correct the number of acceleration values by selecting the Options Analysis command see section 3 5 3 Error 101 Cut Off Frequency Is Illegal e The cut off frequency for ACS SASSI SOIL module is less than zero e Correct the cut off frequency by selecting the Options Analysis command see section 3 5 3 Error 102 Illegal Reading Format e The reading format for ACS SASSI SOIL module is illegal e Correct the reading format by selecting the Options Analysis command see section 3 5 3 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 227 ACS SASSI PREP User Manual 228 Error 103 Illegal Number of Header Lines e The number of header lines for ACS SASSI SOIL module is less than zero e Correct the number of header lines by selecting the Options Analysis command see section 3 5 3 Error 104 Illegal Control Layer Number e The control layer number for ACS SASSI SOIL module is illegal e Correct the control laye
293. me histories for accelerations ACCxxx soil layer strains prefix SNxxx and stresses prefix SSxxx The xxx notations refers to free field soil layer number numbering is done from the ground surface to the depth SOIL also produces the text file FILE73 that contains the material soil curves that are used for the non linear SSI analysis by the STRESS module and FILE88 with the iterated equivalent linear or effective soil properties that are used by SITE is non linear SSI option is selected by the user 3 LIQUEF Not available in this version 4 Module SITE The SITE module solves the site response problem The input file has extension sit and it is created by the ACS SASSI PREP AFWRITE command The control point and wave composition of the control motion has to be defined in the input files The information needed to compute the free field displacement vector used is computed and saved on disk in FILE1 The SITE program also stores information required for the transmitting boundary calculations in FILE2 The actual time history of the control motion is not required in this program module but later in the MOTION module The soil motion incoherency is introduced elsewhere in the HOUSE module In addition to the output and binary files FILE1 and FILE2 5 Modules POINT2 and POINT3 The POINT module consists of two subprograms namely POINT2 and POINTS for 2D and 3D SSI problems respectively The input file has extension poi and it is cr
294. ment complex TF and the relative displacement time histories See Table 1 for more details on the SSI response text files 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 32 ACS SASSI MAIN User Manual 33 RS Frames Naming Scheme RS _ freq _filenum g RSO1_000 10_ 00001 Damping number freq frequency fnum Frame number TFU Frames Naming Scheme TFU_freg_filenum freq frequency fnum Frame number ACC Frames Naming Scheme ACC_time_filenum time time fnum Frame number THD Frames Naming Scheme e g THD 00 000 _00001 THD_time_filenum time time fnum Frame number Stress Frame Naming Scheme stress _time_fnum_comp e g stress 00 000 00001 sig time time fnum Frame number comp Stress Component sig Solids Normal Stress Membrane Stress tau Solids Shear Stress Shells Membrane Shear bdsig Bending Stress shell elements only bdtau Bending Shear shellelements only Soil Pressure Frame Naming Scheme press_time_fnum_type e g pres 00 000 _00001_nod g TFU_ 000 02 00001 g ACC_00 000 00001 Frame number type Element Values or Nodal Values Element Values Nodal Values Table 2 Frame Files produced by MOTION RELDISP and STRESS Modules If the RELDISP post processing restart option is used then additional text files for post processing are generated in th
295. mic soil properties are common to all models Select the soil property from the list box The grid shows the shear strain shear modulus and shear strain damping ratio curve values The soil material curves should be defined by up to 11 data points New Select this button to define a new property Edit Select this button to edit the label of the active soil property Delete Select this button to delete the active soil property Title Shows the title of the active soil property You may change the drawing options using the following commands Options Window Settings see section 3 5 17 Options Colors see section 3 5 25 or Options Font see section 3 5 29 Use the View menu to switch among the multiple open windows see View 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 48 ACS SASSI PREP User Manual 49 1 2 command section 3 7 6 ACS SASSI Prep Dynamic Soil Property Rock Model File Batch Plot Options Window wiew Help 3 2 alos xal Ela ZE P al awr To jo alela aaa eel E TE MLE a Damping Ratio D gt Se D o on 53 5 o a a pd oo Shear Strain For Help press F1 3 4 9 Open Bubble Plot Window Select Bubble Plot from the Plot submenu Shortcuts none Use this command to open a new bubble plot window When this command is first entered it will bring up the Open Plot Data window where the user can
296. mit the bending moments from the BEAM or SHELL element to the SOLID elements the user has to include in the FE model additional massless BEAM or SHELL elements along the edges or the faces of the SOLID elements By doing this the nodal rotations are transmitted to the SOLID elements through the node rotations of the additional BEAM or SHELL elements The added BEAM and SHELL elements transmit the bending moments from the original BEAM and SHELL element nodes by force couples at the SOLID element nodes Another situation to pay attention is the connection between BEAMs and SHELLs Since there is no stiffness for the in plane SHELL rotation drilling the BEAM in plane rotation cannot be transmitted to the SHELL nodes For such situations the user should build an additional local tripod BEAM system to transmit the node rotation to the neighbor nodes Depending on the situation at hand a possible alternate could be the FIXROT command For oblique SHELLs this command will add additional torsional springs for the in plane SHELL rotations of all oblique SHELL elements The user can control the in plane rotational stiffness values of the springs by modifying the D commands included in the pre input file that is updated using WRITE command after the FIXROT command was applied Additional SSI model checking commands included in the SUBMODELER module that warns the user about potential modeling mistakes are FIXEDINT and HINGED The two commands identify the
297. mpute Maximum amp Time History 7 Outcropping Response Spectrum V Save Response Spectrum I Outcropping hae fee f Damping Ratios 0 02 0 05 aiis l mi sini Pp _ re EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Stresses amp Strains V Compute Stresses Tl Save Stress Time History V Compute Strains I Save Strain Time History Spectral Amplification Factor Save Spectral Amplification Factor Outcropping of First Layer J Outcropping of Second Layer Second Layer Number Fourier Spectrum Tl Compute Fourier Spectrum Tl Save to File fo I Outcropping Nr of Smoothenings Nr of Values to Be Saved fo Select response spectrum output options for the active layer Stresses amp Strains Select stress and or strain output options for the active layer Spectral Amplification Factor Select spectral amplification factor output options for the active layer Fourier Spectrum Select Fourier spectrum output options for the active layer Input for Liquefaction Analysis not included in this version uses input file liq 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 68 ACS SASSI PREP User Manual 69 3 5 6 Set the Analysis Options for the ACS SASSI SITE Module The SITE module solves the site response problem for a set of horizontal soil layers above a visco elastic halfspace
298. n Earthquake Engineering ECEE Moscow September Ghiocel D M 1986a Probabilistic Seismic Soil Structure Interaction Analysis 8th European Conference on Earthquake Engineering ECEE Lisbon September Ghiocel D M et al 1986b Effects of Spatial Character of Seismic Random Excitations on Structures 8th European Conference on Earthquake Engineering ECEE Lisbon September Ghiocel D M 1986c PRELAMOS Computer Program for Stochastic Parameter Estimation of Accelerograms 5 National Symposium on Informatics in Civil Engineering Sibiu September Ghiocel D M 1985a Probabilistic Seismic Analysis of the Containment Structure of a Nuclear Reactor Building Journal of Civil Engineering vol 11 Bucharest Ghiocel D M et al 1985b Seismic Risk Evaluation for Buildings Including Soil Structure Interaction Scientific Bulletin of Civil Engineering ICB Bucharest Ghiocel D M et al 1983a Actual Tendencies in Seismic Analysis of Nuclear Power Plants Structures Scientific Bulletin of Civil Engineering vol 2 ICB Bucharest 8 References Copyright 2014 by Ghiocel Predictive Technologies Inc 87 ACS SASSI MAIN User Manual 88 37 38 39 40 44 42 43 44 45 46 47 48 49 Ghiocel D M et al 1983b Advanced Computational Methods in Seismic Analysis of Nuclear Power Plants Scientific Bulletin of Civil Engineering vol 1 ICB Bucharest Ghiocel D
299. n 4 4 21 Shows masses in selected node section 4 4 22 Locks unlocks redraw section 4 4 23 4 4 1 Rotate the Model to the Left Select a from the Plot tool bar Shortcut Keys Ctrl Left Click this button to rotate the model in the active Model Plot window to the left by an angle step defined by the horizontal rotation increment set by the Options Window Settings command see section 3 5 15 4 4 2 Rotate the Model to the Right Select gt from the Plot tool bar Shortcut Keys Ctrl Right Click this button to rotate the model in the active Model Plot window to the right by an angle step defined by the horizontal rotation increment set by the Options Window Settings command see section 3 5 15 4 4 3 Rotate the Model Upward Select Al from the Plot tool bar Shortcut Keys Ctrl Up Click this button to rotate the model in the active Model Plot window upward by an angle step defined by the vertical rotation increment set by the Options Window Settings command 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 150 ACS SASSI PREP User Manual 151 see section 3 5 15 4 4 4 Rotate the Model Downward Select Md from the Plot tool bar Shortcut Keys Ctrl Down Click this button to rotate the model in the active Model Plot window downward by an angle step defined by the vertical rotation increment set by the Options Window Settings command see section 3 5
300. n a dialog box for the arguments This is a more user friendly way of running instructions and is recommended for users who are not familiar with ACS SASSI PRE and its instructions Change the instruction type by selecting the All Instructions see section 4 3 3 General Instructions see section 4 3 4 Node Instructions see section 4 3 5 Element Instructions see section 4 3 6 or Load Instructions see section 4 3 7 button 4 3 3 Load All Instructions into the Instruction List Select from the Instruction List tool bar 4 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 147 ACS SASSI PREP User Manual 148 This command loads all commands into the nstruction List see section 4 3 2 4 3 4 Load General Instructions into the Instruction List Select from the Instruction List tool bar This command loads general commands into the nstruction List see section 4 3 2 4 3 5 Load Node Instructions into the Instruction List Select from the Instruction List tool bar This command loads node commands into the nstruction List see section 4 3 2 4 3 6 Load Element Instructions into the Instruction List Select from the Instruction List tool bar This command loads element commands into the nstruction List see section 4 3 2 4 3 7 Load Load Instructions into the Instruction List Select from the Instruction List tool bar This command loads load commands into the nstruction List
301. n the vertical mesh size but this should be demonstrated on a case by case basis The required horizontal mesh size depends on the scattered wave composition If the seismic wave pattern in the excavated soil volume consists of 1D vertically propagating waves then the horizontal element sizes in excavation volume are not restricted at all Thus the excavation volume horizontal element sizes could be several times larger than vertical sizes This size different happens when the structural basement mass and stiffness are close to excavated soil stiffness and mass In this situation the wave scattering effects are very low and thus the vertically propagating waves are the predominant waves The larger the discrepancy between the complex dynamic stiffness of the structural basement and excavated soil is the more refined horizontal mesh is required to be 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 49 ACS SASSI MAIN User Manual 50 since larger wave scattering effects will occur WARNING Sensitivity mesh studies are recommended to validate the horizontal mesh size if larger horizontal mesh size than vertical size is used 20 Half Space Simulation In order to simulate the halfspace condition at the bottom boundary two techniques variable depth method and viscous boundary method at the base are included In the variable depth method up to 20 extra layers with total thickness of 1 5A and with the pro
302. n u within the embedded part of the structure 2 Solve the impedance problem to determine the matrix Xe 3 Solve the structural problem This involves forming the complex stiffness and load vectors and solving the above equations for the final SSI response displacements 2 2 SITE RESPONSE ANALYSIS The original site is assumed to consist of horizontal soil layers overlying a uniform half space All material properties are assumed to be viscoelastic Usually the values of the soil shear stiffness and hysteretic damping of each layer correspond to the equivalent values computed from the non linear free field analysis Only the free field displacements of the layer interfaces where the structure is connected are of interest The displacement amplitude solution is expressed in the form 2 THEORETICAL BASIS Copyright 2014 by Ghiocel Predictive Technologies Inc 22 ACS SASSI MAIN User Manual 23 u x U exp i t kx where U is a mode shape vector which contains the interface amplitudes at and below the control point x 0 and k is a complex wave number which expresses how fast the wave propagates and decays in the horizontal x direction Effective discrete methods are used for determining appropriate mode shapes and wave numbers corresponding to control motions at any layer interface for inclined P SV and SH waves Rayleigh waves and Love waves Any combination of seismic waves can be applied ACS SASSI includes also the
303. nal effort involved The FV method is accurate but very computational intensive thus limiting the size of the FE structural model The impedance calculations are proportional with the power 2 3 of the number of interaction nodes It is not uncommon that the FV method could take orders of magnitude longer that the FI FSIN and FI EVBN methods The larger the SSI model excavation is the more effective the Fl methods are in terms of speed The problem is to make sure that the Fl methods maintain the accuracy of SSI results Because of the need to check FI accuracy preliminary sensitivity studies using the Fl and FV method are always recommended when dealing with embedded structures Typically FI EVBN provides both numerical accurate and reasonable computational speed when compared with the reference FV method except for deeply embedded structures or some very particular conditions for which FFV is more appropriate Ghiocel 2010a Ghiocel et al 2010c Ghiocel et Al 2013a The FI EVBN method is several times faster than the FV method and only few times slower than the FI FSIN method The FI FSIN could become numerically unstable in the higher frequency range depending on the surrounding soil stiffness and the excavation volume configuration For stiffer soil sites or rock sites the FI FSIN method is expected to provide accurate results coincident with the FV and FI EVBN method results 9 It should be also noted that the FV method is more robust
304. nd absolute displacements RS Response spectra data files generated by the motion module Naming Scheme for TFU TFI TFD ACC Files Characters 1 5 Node Number Characters 6 9 Translation TR or Rotational R degree of freedom Characters 10 11 Damping rationumber TFU Uninterpolated acceleration transfer functions written by the motion module and stress transfer functions TFI Interpolated acceleration transfer functions written by the motion module and stress transfer functions written by the stress module TFD Displacement transfer functions generated by the reldisp module THD Displacement time history written by reldisp module ACC Acceleration time history written by motion module Naming Scheme for Acceleration TFU Acceleration TFI TFD THD and ACC Files Characters 1 5 Node Number Characters 6 9 Translation TR or Rotational R degree of freedom TH Soil time history for layers Naming Scheme ACC Acceleration time history for soil layer i e ACCOO1 TH is the acceleration time history for soil layer 1 s t Strain time history for soil layer i e SNOO1 TH is the straintime history for soil layer 2 on Stress time history for soil layer i e SS001 TH is the stress time history for soil layer 3 THS Stress time history written by stress module Naming Scheme for THS stress TFU and Stress TFI etype_gnum_enum_comp etype element type group number element number comp stress compone
305. nd on the following lines one force factor If lt opt gt 1 then the lines of the file must contain a pair of 2 values arrival time and force factor 5 4 6 Scale Forces FSCALE lt n1 gt lt n2 gt lt inc gt lt sx gt lt sy gt lt sz gt scales the forces belonging to the node set defined by lt n1 gt to lt n2 gt with step lt inc gt multiplying the force factors with the scaling factors lt sx gt lt sy gt lt sz gt If one scaling factor has the value 0 0 it will be set to 1 0 If lt n1 gt and lt n2 gt are not specified they will be set to 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 205 ACS SASSI PREP User Manual 206 the last 2 defined nodal forces The default value for lt inc gt is 1 This instruction works similarly to the NSCALE instruction from the Node Instructions group see section 5 2 17 with the difference that forces are modified 5 4 7 Define a Moment MM lt n gt lt fxx gt lt fyy gt lt fZZ gt lt txx gt lt tyy gt lt tzz gt defines the moment with moment factors lt fxx gt lt fyy gt lt fzz gt and moment arrival times lt txx gt lt tyy gt lt tzz gt in node lt n gt 5 4 8 Delete Moments MMDEL lt n1 gt lt n2 gt lt inc gt deletes the moments from the nodes between lt n1 gt to lt n2 gt default lt ni gt with step lt inc gt default 1 5 4 9 List Moments MMLIST lt n1 gt lt n2 g
306. ned differently depending on the SSI substructuring approach to be used In ACS SASSI the three main SSI substructuring approaches are i The Flexible Volume method FV also called Direct method with SSI interaction nodes defined for all the excavated soil volume nodes ii the Flexible Interface method FI with SSI interaction nodes defined only at the Foundation Soil Interface Nodes FI FSIN also called Subtraction and iii the Flexible Interface method Fl with SSI interaction nodes defined only at the Excavated Volume Boundary Nodes FI EVBN also called Modified Subtraction Method MSM Note In ACS SASSI the implementation of the three substructuring methods FV Direct FI FSIN Subtraction Method SM and FI EBVN or MSM are implemented using the same algorithm and matrix formulation as described in Section 2 1 In addition to the above mentioned three SSI substructuring methods recently a new SSI substructuring method called the Fast FV method FFV was introduced This method is much faster than the reference Flexible Method FV and is highly accurate for deeply embedded models Ghiocel 2013a This FFV method is applicable only with the Fast Solver code Option FS and is useful for larger size SSI models that include a very large number of FV interaction nodes and run slow say with 20 000 50 000 interaction nodes Using FFV the total number of interaction nodes can be reduced several times and by this the overall SSI analysis r
307. ng the time history The value is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 Max Value for Time History Type the maximum value of time history to be used The value is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 First Record Type the first record from the time history file to be used The value is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 Last Record Type the last record from the time history file to be used The value is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 Title Type the title of the acceleration time history The title is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 Acceleration History File Type the full path and name of the time history file The file name is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 File Contains Pairs Time Step Acceleration Select this option if your time history file contains pairs of time step and acceleration values on each line The option is the same as set in the Analysis Options MOTION dialog box see section 3 5 11 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 110 ACS SASSI PREP User Manual 111 Element Output Data The list box contains groups and lists of elements having the same output request Press the Add button to add a element
308. nment option and only COOXxxx files for New Structure option Additional required restart files for the ANALYS fast solver are DOFSMAP FILE90 and FILE91 Print Transfer Functions If this option is not set ANALYS will printout the complex ATF real and imaginary parts for all nodal points and frequencies for which the solution has been obtained This option may be used for machine vibration problems in which the exciting load is harmonic in most other cases this option should not be used in order to avoid a large output which is not needed It should be noted that complex ATF amplitude and phase values can be output using MOTION Frequency Numbers Set the Take Frequency Numbers from File1 File9 check box if you wish to load the frequencies from File1 or File9 Otherwise type the frequency set number in the Frequency Set Number edit box The value is the same as set in Analysis Options SITE dialog box see section 3 5 6 Frequencies for which a complete SSI solution is desired must be specified at this stage The program automatically surveys these frequencies to make sure that they reside in the input files If one or more frequencies are not found on the input files ANALYS stops It is also possible to break the complete frequency set into smaller sets and then run each set separately The results of these separate runs can be combined into the complete solution This has the advantage that the runs are smaller and the created fi
309. nologies Inc ACS SASSI PREP User Manual 205 5 4 2 Delete Forces FDEL lt n1 gt lt n2 gt lt inc gt deletes the forces from the nodes between lt n1 gt to lt n2 gt default lt ni gt with step lt inc gt default 1 5 4 3 List Forces FLIST lt n1 gt lt n2 gt lt inc gt lists the forces from the nodes between lt n1 gt and lt n2 gt with step lt inc gt default 1 If no parameters are specified all forces will be listed 5 4 4 Modify a Force FMOD lt n gt lt fx gt lt fy gt lt fz gt lt tx gt lt ty gt lt tz gt modifies the force from node lt n gt for non zero values of force factors lt fx gt lt fy gt lt fz gt and force arrival times lt tx gt lt ty gt lt tz gt This instruction works as the NMOD instruction from the Node Instructions group see section 5 2 15 with the difference that forces are modified 5 4 5 Read Forces from File FREAD lt n gt lt r1 gt lt r2 gt lt dir gt lt opt gt lt file gt reads a set of forces from the file lt file gt The parameter lt n gt specifies the first node number for which to read data lt r1 gt and lt r2 gt specify the first and last record number to be read By default all records are read The parameter lt dir gt specifies the direction for which to load data and may have the values x y or z If lt opt gt 0 then the file must contain the arrival time in the first line a
310. not including original pattern default 1 lt ninc1 gt increment to be applied to node numbers for each element set lt el gt first pattern element lt e2 gt last patten element default lt e1 gt lt inc gt pattern step default 1 lt ee gt first element number of the generated elements default the highest number of defined elements 1 5 3 9 Set Integration Order for SOLID elements EINT lt e1 gt lt e2 gt lt inc gt lt order gt sets the integration order for SOLID elements between lt e1 gt and lt e2 gt with step lt inc gt default 1 to rectangular lt order gt 0 skewed lt order gt 1 or extremely distorted lt order gt 2 However using very distorted elements should be avoided as much as possible 5 3 10 List Elements ELIST lt e1 gt lt e2 gt lt inc gt lists the elements belonging to the active group starting with lt e1 gt to lt e2 gt with step lt inc gt If the parameters are not specified all elements from the active group will be listed 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 193 ACS SASSI PREP User Manual 194 5 3 11 Modify an Element EMOD lt ne gt lt n1 gt lt n2 gt lt n20 gt modifies the nodes of element lt ne gt from the active group for the values of lt ni gt that are nonzero To delete the fourth node of a SHELL PLANE or LOVEWAVE element set lt n4 gt to z and the q
311. ns all section 4 3 2 instructions of the selected type Loads all instructions into the section 4 3 3 Instruction List Loads general instructions into the section 4 3 4 Instruction List Loads node instructions into the section 4 3 5 Instruction List Loads element instructions into the section 4 3 6 Instruction List Loads load instructions into the section 4 3 7 Instruction List Ee wN ee 4 TOOLBAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 146 ACS SASSI PREP User Manual 147 4 3 1 Run Instruction Wizard Select from the Instruction List tool bar This command opens a dialog box for the instruction currently selected in the nstruction List see section 4 3 2 The parameters for the instruction are replaced by edit boxes check or radio buttons This is the user friendly way of running instructions However experienced users may prefer the nstruction Line see section 3 7 5 For example the dialog box opened for the NGEN instruction see section 5 2 12 will look like NGEN Instruction Number of Node Sets X Increment Node Number Inc Y Increment Cancel Help Start Node Z Increment End Node Pattern Step 4 3 2 Select Instruction from the Instruction List AFWRITE This list box contains all instructions of the selected type Select the desired instruction from this list and click the nstruction Wizard button see section 4 3 1 and ACS SASSI PREP will ope
312. ns for ACS SASSI SOIL module Defines soil profile data for ACS SASSI SOIL module Sets the response spectrum output options for ACS SASSI SOIL module Sets the spectral amplification factor output options for ACS SASSI SOIL module Sets the stresses and strains output options for ACS SASSI SOIL module Lists general information Defines analysis options for ACS SASSI STRESS module Sets information for symmetry anti symmetry plane line Sets acceleration time history file Sets title for acceleration time history Sets the model title Adds deletes top layers for ACS SASSI SITE module Defines wave information for ACS SASSI SITE module Defines wave passage data for ACS SASSI HOUSE module Writes model data to an input file Writes Relative Displacement Options Writes Relative Displacement Reference File Write a node to the Relative Displacement Output Node List Description section 5 1 34 section 5 1 35 section 5 1 36 section 5 1 37 section 5 1 38 section 5 1 39 section 5 1 40 section 5 1 41 section 5 1 42 section 5 1 43 section 5 1 44 section 5 1 45 section 5 1 46 section 5 1 47 section 5 1 48 section 5 1 49 section 5 1 50 section 5 1 51 section 5 1 52 section 5 1 53 section 5 1 54 section 5 1 55 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 161 ACS SASSI PREP User Manual 162 ACCIN lt no gt lt file gt sets the acceleration time hi
313. nt Frames txt Post processing frames for stress and motion ELEMENT_CENTER_ABS_MAX_STRESSES TXT List of maximum stresses for each element STATIC_SOIL_PRESSURES TXT Defines additional soil pressure geological pressure to be included in soil pressure frames SRSSTF txt SRSS option in motion CONTRRS IN Input file for using external time histories to compute response spectra Table 1 Useful Text Files for the ACS SASSI Result Verification and Post Processing In addition to the output file that could be often very large size if time histories are saved 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 31 ACS SASSI MAIN User Manual 32 MOTION produces specific text files for post processing These text files include the extension TFU TFI ACC RS files that contain nodal SSI responses for the three translation DOF respectively the computed TF TFU interpolated TF TFI acceleration time histories ACC and the in structure response spectra RS for selected damping values These text file names are XxxxxTR_y ext where xxxxx is the node number y is the DOF that can be X Y or Z and ext is the extension that can be TFU TFI or ACC For response spectra files the names are XxxxxTR_yzz RS where zz is the order number of the damping ratio value for example 01 and 02 for two selected values of the damping ratio of 0 02 and 0 05 See Table 1 for more details on the SSI response tex
314. nt response spectra cannot be requested WARNING The definition of an output node twice times produce incorrect results To prevent this the ACS SASSI PREP deletes duplicate nodes when AFWRITE command is executed for MOTION Response Spectrum Data The user can compute the response spectra for selected nodal locations using the setting described next First Frequency Type the first frequency used in response spectrum analysis Hz Last Frequency Type the last frequency used in response spectrum analysis Hz Total Number of Freq Steps Type the total number of frequency steps used in response spectrum analysis If the 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 105 ACS SASSI PREP User Manual 106 first frequency the last frequency and the total number of frequency steps are all zero or blank the following default values are assumed first frequency 0 4 last frequency 40 total number of frequency steps 40 NOTE Per US NRC SRP 3 7 1 requirements we recommend for nuclear safety related projects to use a frequency range from 0 1 Hz to 100 Hz with at least 301 frequency steps WARNING A_ reduced number of frequency steps could affect the accuracy of the PREP spectrum broadening algorithm Damping Ratios Type the damping ratios used in response spectra You may use blank tab or separators between damping ratios Nr of Fourier Components Type the number of values t
315. nverter Beta V 0 1 0 Input File Name Output Pre Input File Format ACS SASSI Fixed Format O ANSYS Ver 11 0 cbd File Disclaimer The File converterhas had limited testing and may provide inaccurate data in some cases Please check all models for accuracy before simulation Select CONVERTERS from the Run submenu Shortcuts none Use this command to run the PREP Converter module that is applicable only to ANSYS Version 11 12 models The file Converter module will take the SASSI fixed format file hou file or SASSI2000 input files with few text modifications please send an email to our tech support at acs sassi ghiocel tech com to help you with SASSI2000 conversion or ANSYS Version 11 12 model data file cdb and convert the file to the ACS SASSI PREP format pre The user can enter the input file full path name into the edit box under the Input file name text or can find the file by pressing the lt lt button next to the edit box The user can then enter an output file path in the Output pre edit box and press the OK button to start the file conversion The input file pathname will be appended with the pre extension and used at the output file pathname if the Output pre edit box is left blank NOTE The SUBMODELER module includes improved version of the PREP Converters that can also translate the ANSYS Version 13 14 models into ACS SASSI models Please see the ACS SASSI ANSYS Integration Capa
316. o logarithmic and the Show Ticks to show ticks on the shear modulus and damping ratio vertical axes Shear Strain Axis Set the Logarithmic check box set the shear strain axis to logarithmic and the Show Ticks to show ticks on the shear strain horizontal axis Show Shear Modulus Line Use the check boxes to enable disable the shear modulus shear strain curve Show Damping Line Use the check boxes to enable disable the damping ratio shear strain curve Soil Property Window Settings x iF G D Axis r Shear Strain Axis OK gososessesesosossesossssessg Logarithmic M Logarithmic Rececesttesceecveseneoeesees I Show Ticks T Show Ticks Cancel ddi Help M Show Shear Modulus Line M Show Damping Line 3 5 20 Interactive 3d Plot Windows Setting The bubble vector Contour and Deformed Shapes Plots all share similar Windows Options Pop up This section will list the all options that can appear in the Windows Option Pop up and describe the functions as well as show the user the options window for each plot Display Nodes Elements in Range Allow user to specify minimum and maximum range in which nodes will appear All node data outside of this range will be hidden from the user For elements all of the node that define the element must be outside of his range Number of Groups Plot Selected Nodes Elements These to boxes give the user the ability to hide node or elements of a model on the b
317. o be used in the Fourier transform The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Time Step of Control Motion Type the time step of control motion sec The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Multiplication Factor Type the multiplication factor for scaling the time history Use only if Max Value for Time History is blank Max Value for Time History Type the maximum value of time history to be used The values of the time history will be scaled to this value Use only if Multiplication Factor is blank First Record Type the first record from the time history file to be used default first Last Record Type the last record from the time history file to be used default last Title Type the title of the acceleration time history Acceleration History File Type the full path and name of the time history file To view the time history file use the Plot Time History command see section 3 4 3 File Contains Pairs Time Step Acceleration Select this option if your time history file contains pairs of time step and acceleration values on each line Otherwise the file is expected to contain the time step on the first line and on the following lines one acceleration value Convert Time History to Response Spectrum This option is for the user convenience Using it the user can compute response spectra for an external time history file not for
318. o generate simulated acceleration histories with the same nonstationary correlation patterns This is an alternative to the use of recorded motion phasing for simulating acceleration histories Also the nonstationary correlation information provides useful insights on the incoming wave patterns for the recorded motions Nonstationary correlation could be used for computing the principal axes of motion WARNING If the nonstationary correlation option is used then the response spectrum compatibility for the correlated components should be regained by inputting the generated correlated acceleration histories as seed records and then by running the EQUAKE module again 2 Module SOIL The SOIL module performs a non linear site response analysis under vertically propagating S waves using an equivalent linear iterative model for soil hysteretic non linear behavior The input file has extension soi and it is created by the ACS SASSI PREP AFWRITE command 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 27 ACS SASSI MAIN User Manual 28 The SOIL module is based on the SHAKE code methodology with some additional programming improvements done over years The computed equivalent soil properties can be sequentially used in the SSI analysis In addition to the output file SOIL produces also other text files with extension TH that are response time histories for plotting purposes The TH files include ti
319. o the university SASSI2000 model in fixed format file inputs to the ACS SASSI input format pre file The ACS SASSI baseline code includes 12 SSI modules EQUAKE SOIL SITE POINT2 POINTS FORCE HOUSE ANALYS MOTION STRESS RELDISP and COMBIN These are used for the SSI analysis calculations The ACS SASSI modular structure for performing SSI analysis was kept as similar as possible to the original SASSI code for the user s convenience The ACS SASSI ANSYS integration capability included in Options A and AA includes two separated interface modules called LOADGEN and SUBMODELER modules that can be launched from the MAIN module GUI 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 15 ACS SASSI PREP User Manual 16 The ACS SASSI fast solver code Option FS includes two separate SSI modules called HOUSEFS and ANALYSFS that replace the baseline HOUSE and ANALYS Note For option AA the HOUSEFS was modified to accommodate the ANSYS models directly and is called HOUSEFSA 1 4 FINITE ELEMENT LIBRARY For structural modelling the ACS SASSI finite element library includes 3D solid elements type SOLID e3D beam elements type BEAMS e3D plate shell elements type SHELL e2D plane strain elements type PLANE e2D membrane elements type PLANM e3D spring elements type SPRING e3D stiffness amp mass generalized elements type GENERAL The excavated soil volume could be modeled using the following finite element t
320. oaches and a rigorous stochastic simulation approach that is called Simulation Mean approach included in the 2006 2007 EPRI validation studies There are seven plane wave incoherency models incorporated into the code the Luco Wong model 1986 theoretical unvalidated model and five Abrahamson models empirical isotropic or anisotropic based on the statistical dense array records The Abrahamson models include the coherency models published in 1993 2005 all sites surface foundations 2006 all sites embedded foundations 2007a rock sites all foundations 2007b soil sites surface foundations and user defined coherency models The new ACS SASSI version includes directional or anisotropic Abrahamson coherency models in addition to the currently implemented isotropic or radial Abrahamson coherency models Also it includes user defined coherence functions that can be different in two orthogonal principal horizontal directions The user defined plane wave coherency models could be useful for particular sites for which more detailed seismological information is available or for sensitivity studies For the SSI applications with elastic foundation FE models only the stochastic simulation approach should be used The AS and SRSS deterministic approaches are simplified incoherent SSI approaches that have only a limited application to rigid base mat SSI models as validated by EPRI Thus the deterministic approaches are not directly appli
321. odal forces and moments 0 otherwise Note This instruction is provided for input files To set the analysis options for the ACS SASSI STRESS module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 12 5 1 45 Set Information for Symmetry Anti Symmetry Plane Line SYMM lt no gt lt type gt lt node 1 gt lt node2 gt lt node3 gt sets the information for symmetry anti symmetry plane line number lt no gt maximum 2 where lt type gt 0 symmetry lt type gt 1 anti symmetry and lt node1 gt lt node 2 gt and lt node3 gt define the line plane The three nodes defining a plane must not lie on a straight line To reset the plane line set lt node1 gt to 0 To list the active planes lines use the STATUS instruction see section 5 1 43 Any combination of a maximum of two structural planes lines of symmetry which are symmetric or anti symmetric relative to the loading can be considered In case of a 3D analysis the planes of symmetry or anti symmetry must be parallel to the xz or yz planes In case of 1D or 2D analysis the line of symmetry anti symmetry must be parallel to the z axis Also note that the name symmetry or anti symmetry is used in relation to the loading 5 1 46 Set Acceleration Time History File THFILE lt file gt sets the acceleration time history file to lt file gt Note This instruction is provided for input files To set the time hi
322. odify a Real Property MODR lt nm gt lt axial gt lt shear2 gt lt shear3 gt lt tors gt lt flex2 gt lt flex3 gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 198 ACS SASSI PREP User Manual 199 modifies the real property set number lt nm gt with axial area lt axial gt shear area for local axis 2 lt shear2 gt shear area for local axis 3 lt shear3 gt torsional inertia moment lt tors gt flexural inertia moment for local axis 2 lt flex2 gt and flexural inertia moment for local axis 3 lt flex3 gt If one of the parameters lt axial gt lt flex3 gt is zero the old value will be left unchanged To set a value to zero use a number less or equal to 1e 20 or z 5 3 29 Modify a Spring Property MODSC lt nm gt lt SCX gt lt SCY gt lt SCZ gt lt SCXX gt lt SCYY gt lt SCZZ gt modifies the spring property set number lt nm gt with the translational spring constants lt scx gt lt scy gt and lt scz gt and the rotational spring constants lt scxx gt lt scyy gt and lt SCzz gt If one of the parameters lt scx gt lt sczz gt is zero the old value will be left unchanged To set a value to zero use a number less or equal to 1e 20 or z 5 3 30 Set Element Material Soil Layer Index MSET lt e1 gt lt e2 gt lt inc gt lt index gt sets the material soil layer index to lt index gt for the elements in the active group from lt e1 gt
323. of frequency steps for response spectra lt mult gt multiplication factor for scaling time history lt max gt maximum value of time history to be used The values of time history will be scaled to the given maximum value lt reci gt first record of time history file to be written to analysis file lt rec2 gt last record of time history file to be written to analysis file default last record from file lt fopt gt time history file option 0 file contains time step on the first line one acceleration on each other line 1 file contains pairs of time step and acceleration on each line lt bl gt baseline correction 0 time domain 1 frequency domain lt smo gt smoothing parameter lt cplx gt determine if the RS will be complex or not lt cnvrt gt motion convert lt pzadj gt Phase Adjustment parameter lt interp gt Motion interpolation Option Note This instruction is provided for input files To set the analysis options for the ACS SASSI MOTION module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 25 Create a New Model NEW lt modelname gt creates a new model in the active database belonging to the active building The parameter lt modelname gt specifies the model name and path Example c models model1 If the directory does not exist it will be created Note This instruction is provided for input files To create a new model from the A
324. of the ACS SASSI Version 3 0 code includes a number of 11 distinct SSI analysis interrelated modules as shown in Figure 1 1 Note The POINT module has two versions POINT2 and POINTS for 2D and 3D SSI analysis In addition to the 12 SSI modules there are two other software modules related to the ACS SASSI ANSYS interfacing These two modules are included for the Options A and AA capabilities The LIQUEF and PINT modules that are present in the GUI menus are not included in this version The MAIN PREP and SUBMODELER are the GUI modules programmed in VC These three GUI modules handle all the operations in ACS SASSI from opening model databases building SSI models and running SSI analysis to performing post processing the SSI results Input Analysis Results COOXxxx EQUAKE EQUAKE_ COOK worn pS Q L9 D C5 62 Complex TF Anais gt j comsin RELDISP nana Figure 1 1 ACS SASSI Modular Structure Configuration The ACS SASSI MAIN maintains model information runs the selected modules and shows output files The ACS SASSI PREP module is a pre processor which handles data for all ACS SASSI modules in a user friendly way including graphics comprehensive check and a help system The ANSYS to ACS SASSI and ACS SASSI to ANSYS converters included in the SUBMODELER and PREP modules are programmed in C and are used for translating the ANSYS Versions 11 14 model in cdb file and also the university SASSI2000 model in fixed format
325. olid element face The nodal stress was assumed to be equal to element center stress that introduce a certain level of approximation of the nodal stresses no shape functions are used In addition the nodal averaging process could produce stresses and pressures could produce values that are difficult to interpret and use The accurate stress and soil pressure values to be used by the analyst for the SSI calculations and seismic design are the computed values in the element centers that are provided in the STRESS outputs or the text files called ELEMENT _CENTER_ABS MAX_STRESSES TXT and _ pres_max_ele not the nodal average values However the average nodal stress and soil pressure add invaluable information for understanding the SSI model seismic behavior and for identifying the critical stress zones or critical pressure areas on the foundation walls and mat For the non linear SSI analysis option STRESS generates the FILE74 after each SSI iteration FILE74 is then used by HOUSE for the next SSI iteration The element stress frames are also available per user s request but this is not 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 35 ACS SASSI MAIN User Manual 36 documented in this manual 13 Module COMBIN The COMBIN module combines results computed for different frequencies from two ANALYS runs This module is useful when after the solution was obtained it is found that some additional fr
326. ologies Inc 207 ACS SASSI PREP User Manual 208 This instruction works as the NMOD instruction from the Node Instructions group see section 5 2 15 with the difference that rotational masses are modified 5 4 16 Scale Rotational Masses MRSCALE lt n1 gt lt n2 gt lt inc gt lt sx gt lt sy gt lt sz gt scales the rotational masses belonging to the node set defined by lt n1 gt to lt n2 gt with step lt inc gt with the scaling factors lt sx gt lt sy gt lt Sz gt If one scaling factor has the value 0 0 it will be set to 1 0 If lt ni gt and lt n2 gt are not specified they will be set to the last 2 defined rotational masses The default value for lt inc gt is 1 This instruction works similarily to the NSCALE instructions from the Node Instructions group see section 5 2 17 with the difference that rotational masses are modified 5 4 17 Scales Moments MSCALE lt n1 gt lt n2 gt lt inc gt lt sx gt lt sy gt lt sz gt scales the moments belonging to the node set defined by lt n1 gt to lt n2 gt with step lt inc gt multiplying the moment factors with the scaling factors lt sx gt lt sy gt lt sz gt If one scaling factor has the value 0 0 it will be set to 1 0 If lt n1 gt and lt n2 gt are not specified they will be set to the last 2 defined nodal moments The default value for lt inc gt is 1 This instruction works similarily to the NSCALE instruction from
327. ommands INTGEN and ETYPEGEN which can be used to automatically define the interaction nodes for different SSI substructuring methods such as FV FI EVBN FI FSIN and FFV For the FFV method the user needs to use repeatedly the INTGEN command to create additional interaction nodes for each selected internal interaction node layering Please see ACS SASSI ANSYS Integration Capability User Manual Revision 3 for details on the SUBMODELER module and the INTGEN and ETYPEGEN commands 7 In addition to the FV and FI methods the ACS SASSI baseline software includes the old Skin Method implemented also in the original university SASSI code WARNING The Skin Method is not recommended for nuclear applications and it was not V amp V ed under company QA program Its implementation is only for research and benchmark purposes not for design related projects The FV and FI methods are much more accurate especially for unstructured excavation meshes The Skin Method is still available only in the baseline version since it was implemented in the original university SASSI code not because of its accuracy or numerical performance merits The skin method should not be used for nuclear safety related projects and is not included in the Fast Solver code Option FS because it was replaced by the FFV method 8 When selecting the substructuring method for SSI analysis the user should make a trade off between the required accuracy of results and the computatio
328. on multiple support excitations for isolated foundations linear or nonlinear SSI analysis The ACS SASSI NQA Version 3 0 includes a set of 44 seismic SSI verification problems many of these including several subproblems The Verification Manual has 270 pages including 264 figures In these V amp V problems the computed SSI results using ACS SASSI are compared against benchmark results based on published analytical solutions or computed using other validated with computer programs including SHAKE91 SASSI2000 and ANSYS Each SSI verification problem tests a different capability of the ACS SASSI NQA code The total number of the V amp V computer input files and output files for all the SSI verification problems of the ACS SASSI NQA version is about 5 000 files that require about 300 MB hard drive space 1 2 SPECIFIC SSI MODEL SIZE RESTRICTIONS The ACS SASSI Version 3 0 baseline code has been extensively verified tested and used for seismic 3D soil structure interaction models up to 25 000 nodes including up to 5 000 interaction nodes However for 20 000 node or slightly larger size SSI problems the baseline code becomes highly inefficient on regular PCs with 16GB RAM since the analysis run time and the disk storage go out of hand Much larger RAM is required to run larger size problems Note That sometimes depending on a case by case situation the number of interaction nodes that can be considered for incoherent SSI analysis could be less th
329. on 6 4 1 page 75 Run All Start section 6 4 2 page 76 Run All Stop section 6 4 3 page 76 Context Help section 6 8 1 page 83 7 TOOL BAR BUTTONS Copyright 2014 by Ghiocel Predictive Technologies Inc 84 ACS SASSI MAIN User Manual 85 8 References 10 11 Abrahamson N 1993 Spatial Variation of Multiple Support Inputs the 1st US Seminar on Seismic Evaluation and Retrofit of Steel Bridges University of California at Berkeley San Francisco October 18 1993 Abrahamson N 2005 Spatial Coherency for Soil Structure Interaction Electric Power Research Institute Report 1012968 Palo Alto CA December Abrahamson N 2006 Program on Technology Innovation Spatial Coherency for Soil Structure Interaction Electric Power Research Institute Palo Alto CA and US Department of Energy Germantown MD Report 1014101 December Abrahamson N 2007 Hard Rock Coherency Functions Based on the Pinyon Flat Data Electric Power Research Institute Palo Alto CA and US Department of Energy Germantown MD Report 1015110 December Ghiocel D M Yue D Fuyama H Kitani T and McKenna M 2013a Validation of Modified Subtraction Method for Seismic SSI Analysis of Large Size Embedded Nuclear Islands SMiRT22 Proceedings Division V San Francisco California August 18 23 Ghiocel D M Comparative Studies on Seismic Incoherent SSI Analysis Methodologies 2013b SMiRT2
330. on group is designed to define elements and geometrical and material properties The instructions are Instruction Action Description DELL Deletes soil layers section 5 3 1 DELM Deletes materials section 5 3 2 DELR Deletes real properties section 5 3 3 DELSC Deletes spring properties section 5 3 4 E Defines an element section 5 3 5 ECOMPR Compresses elements section 5 3 6 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 188 ACS SASSI PREP User Manual 189 Instruction Action Description EDEL Deletes elements section 5 3 7 EGEN Generates elements by translation section 5 3 8 EINT Sets integration order for SOLID section 5 3 9 elements ELIST Lists elements section 5 3 10 EMOD Modifies an element section 5 3 11 ETYPE Sets type for SOLID PLANE or section 5 3 12 LOVEWAVE elements GCOPY Copies a group section 5 3 13 GDEL Deletes groups section 5 3 14 GLIST Lists groups section 5 3 15 GROUP Creates or activates a group section 5 3 16 GTIT Sets group title section 5 3 17 KI Defines end release code in node of section 5 3 18 BEAMS elements KJ Defines end release code in node J of section 5 3 19 BEAMS elements KMOD Assigns K node to BEAMS elements section 5 3 20 L Defines a soil layer section 5 3 21 LLIST Lists soil layers section 5 3 22 M Defines a material section 5 3 23 MACT Sets active material soil layer index section 5 3 24 MLIST Lists materials section 5 3 25 MODL Mod
331. on in practice so far The following phase adjustment options could be selected 0 No phase adjustment It maintains untouched the complex response phasing coming from SSI physics It is recommended when the SSI response phase preservation is important for post processing time histories for example when the analyst is interested to compute nodal relative displacement time histories Not used in EPRI studies since it provided slightly lower results for the vertical incoherent input than other industry approaches implemented by ARES Co and Bechtel Engineering 1 Phase adjustment option that reduces largely the differential phase differences between Fourier components and also limits phases to a 90 degrees angle to avoid counteracting effects of neighbor frequencies to create a minimum delay input history for which only positive cosines in the phase space It is an approximate approach that is expected to be generally conservative as indicated by the 2007 EPRI validation studies Short et al 2007 It produces results that are very close to the results obtained using the SRSS TF approach with zero phase as shown in the 2007 EPRI studies The phase adjustment option received a consensus agreement among the technical investigators of the 2007 EPRI studies since it provided the best matching between different industry approaches tested during the research project WARNING The phase adjustment similar to the use of the SRSS approaches is an in
332. on to display the S wave damping ratio of the layers 3 5 18 Spectrum TFU TFI Impedance Plot Window Settings 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 124 ACS SASSI PREP User Manual 125 Spectrum Window Settings Acceleration Axis MV Show Ticks Spectrum Curves M Show Line 1 M Show Line 2 MV Show Line 3 MV Show Line 4 M Show Line 5 Frequency Axis Logarithmic Show Ticks Show Line 6 Show Line 7 Show Line 8 Show Line 9 Show Line 10 OK Cancel Help MV Show Line 11 MV Show Line 12 Graph Title range Max 100 Y range Max 11 7549 x Range Min 0 1 Y Range Min fo Spectral nalysis Postprocessing Broadening and Enveloping Spectra Peak Difference fo Superposition of Three Directional Effects Linear Combination Linear Combination Coefficients Spectra 1 fo Spectra 2 fo Spectra 3 fo Average Broaden Broaden fo SASS This Spectrum Window that is used for Spectrum Plots can also provide special post processing capabilities of computed in structure response spectra ISRS for i spectral peak broadening ii enveloping of multiple spectra without or with bridging of spectral valleys and iii combination of three directional component spectra using either SRSS rule or a weighted linear superposition rule Only up to 15 spectrum curves can used at one time for i and ii Only 3 curves are required for iii The following o
333. onal System IS m sec 2 or the British System BS ft sec 2 respectively It should be noted that these are not the same units that are used for the simulated acceleration velocity and displacement histories acceleration is in g s or the acceleration PSD amplitude in the IS cm sec 2 or in the BS ft sec 2 Other response quantities that use the peak acceleration PGA velocity PGV and displacement PGD values are provided in the EQUAKE output in the same units as printed in the NUREG CR 6728 Tables 3 5 and 3 6 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 65 ACS SASSI PREP User Manual 66 3 5 5 Set the Analysis Options for the ACS SASSI SOIL Module The SOIL module performs a nonlinear site response analysis under vertically propagating S waves using an equivalent linear iterative model for soil hysteretic nonlinear behavior It uses the same methodology and implementation as the SHAKE91 code The following options allow you to specify the analysis options for ACS SASSI SOIL module Input Motion Number of Fourier Components Type the number of values to be used in the Fourier transform The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Time Step of Control Motion Type the time step of control motion sec The value is the same as set in the Analysis Options SITE dialog box see section 3 5 6 Number of Values Type the time number of accel
334. ons Window wiew Help ala all ela NP a Z FMop Alea aali eaaa Spe ml mel eE ee 3 Output No active database For Help press F1 The ACS SASSI PREP menu has the following submenus Model New Creates a new model Open Opens an existing model Input Opens an input file Output Opens Closes an output file Convert to ANSYS Converts the ACS SASSI structural model to ANSYS ADPL input format 1 2 3 4 Opens specified model Exit Exits ACS SASSI PREP File Open Opens a file for editing Export Image Capture and Save image in the active window Export Table Export Multiple Spectra curves to file Print Setup Selects a printer and printer connection Print Prints the active window Batch Spectrum Runs batch file for Spectrum Calculations and Save Images Time History Runs batch file for time history calculations Frequency Find TFI frequency points that are outside of a user specified tolerance Frame Selection Find Critical Frames for Stress contour animation Frame Combination Runs batch file for frame combination calculations 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 21 ACS SASSI PREP User Manual 22 Plot Options Window View Help Model gt Elements Model gt Nodes Time History TFU TFI Curves Soil Layers Spectrum Impedance Soil Property Bubble Plot Vector TF Plot Contour Plot gt Static Value Contour Plot gt History Animation Deformed Shape
335. ontain the arrival time in the first line and on the following lines one moment factor If lt opt gt 1 then the lines of the file must contain a pair of 2 values arrival time and moment factor 5 4 13 Generate Rotational Masses by Translation MRAGEN lt itim gt lt ninc gt lt n1 gt lt n2 gt lt inc gt lt mxx gt lt myy gt lt mzz gt generates lt itim gt default 1 sets of rotational masses in the nodes specified by the numbers obtained by incrementing with lt ninc gt default value lt n2 gt lt ni gt 1 the node numbers belonging to the node pattern defined by lt n1 gt to lt n2 gt with step lt inc gt default 1 while at the same time incrementing the pattern masses with lt mxx gt lt myy gt and lt mzz gt default 0 This instruction works similarily to the NGEN instruction from the Node Instructions group see section 5 2 12 with the difference that rotational masses and not coordinates are generated 5 4 14 Delete Rotational Masses MRDEL lt n1 gt lt n2 gt lt inc gt deletes the rotational masses from the nodes between lt n1 gt to lt n2 gt default lt n1 gt with step lt inc gt default 1 5 4 15 Modify a Rotational Mass MRMOD lt n gt lt mxx gt lt myy gt lt mzz gt modifies the rotational masses of node lt n gt for non zero values of lt mxx gt lt myy gt lt mzz gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Techn
336. opup window The File Open window will allow the user to graphically search the directory structure to find the Contour data file Title User input which will add an initial title to the plot window when opened After the OK button is pushed the data from the file should be loaded and the Plot should appear 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 55 ACS SASSI PREP User Manual 56 Model File Batch Plot Options Window View Help Sls Vl eles xal lel RR 2 el Z arwrite lt t Ql Sg m mj eIMIRI Sale elli Fd 118 56240 59 28120 0 00000 59 28120 118 56240 Model Movement Control The Contour Plot window controls for model manipulation which allows the user to view the model at different angles The mouse is used to move the model by using a click and drag method The user will click on the plot window with one of the mouse button then drag the mouse across the window The action the program will take is determined by which mouse button is pressed Left Mouse Button Rotate model around center of mass Middle Mouse Button Move model across screen Right Mouse Button Zoom in out on the model Also Keyboard Buttons have been enabled to give the user a more precise control of rotation Insert Delete Rotate around the X axis Home End Rotate around the Y axis Page Up Page Down Rotate around the Z axis 3 MENU CO
337. ould be noted that the torsional and rocking effects introduced by non uniform mesh are amplified for incoherent inputs Preliminary sensitivity studies are always recommended 12 Sometimes some interaction nodes are defined outside of the excavation volume This happens when there are buried SHELL elements that extend outside of the basement space that encloses the excavation volume This is a relative rare situation in practice Structural nodes that are defined as interaction nodes include nodes used by either SOLID and or SHELL elements 13 For a correct SSI modeling consistent with the flexible volume theory the excavated soil nodes should be different than the structural basement nodes except at the foundation soil interface where the structural basement and excavated soil share the common nodes This is a basic SSI modeling rule that ensures that the two coupled subsystems vibrate independently with the exception of the common nodes placed at the foundation soil interface However in practice sometimes this rule of using separated meshes in the embedment for the basement and the excavated soil was ignored This modeling violation could produce very poor results especially if Fl methods are used It should be noted that the FV method provides often close results for SSI models with separated meshes and unique mesh in the basement This situation is limited to applications with structural basements having stiff walls and floors For flexible
338. oundation models The SRSS approach requires a SSI restart analysis for each incoherent mode The SRSS approach is also difficult to apply since it has no convergence criteria for the required number of the incoherent spatial modes For flexible foundations the number of required incoherent spatial modes could be very large in order of several tens or even hundreds on a case by case basis that could make SRSS impractical for elastic foundation problems The SRSS approaches were implemented in ACS SASSI for benchmarking purposes since this approach was validated by EPRI for stick models rather than for their practicality Note The SRSS approach could provide incoherent responses that are overly conservative in the mid frequency range sometime even much higher than coherent responses and non conservative in the high frequency range iii Nonlinear hysteretic soil behavior is included in seismic SSI analysis using the Seed ldriss iterative equivalent linear procedure for both the global due to wave propagation in free field and the local soil nonlinearity due to SSI effects The local soil nonlinear behavior could be included using near field soil elements For the SSI iterations the ACS SASSI code uses a fast SSI reanalysis or restart solution that uses the already computed far field soil impedance matrix available from the SSI initiation run This feature reduces the run time per SSI iteration by a factor of 5 to 20 times depending of the found
339. ow the STRESS spring forces are computed could be confusing to the user The spring force sign does not reflect that the spring is in tension or compression Post Processing Options Save Max Values Save only maximum values in all elements sig tau bdsig odtau files Save Time Histories in All Elements Save only time histories in all elements sig tau odsig odtau files Restart for Nodal Stress Contours Compute and save frames for contour plots static or animated NTRESS subdirectory Restart for Soil Pressure Contours Compute and save frames for contour plots static or animated SOILPRES subdirectory The options in this box to allow the user to save stress data in all of the nodes so that they can be plotted as stress contours The Save options are to save SSI responses in all DOFs The Restart options generate the frame files for graphical animations These frame files are saved in subdirectories NSTRESS and SOILPRES The Save option can be used in tandem with options for Element Output data fields These post processing Restart option for computing soil pressures on foundation walls and mat adjacent SOLID groups need to be defined for near field soil The Restart for soil pressures could be run first time to get only the seismic pressures and the second time to get the total soil pressures including both the static and seismic pressures before this the user should combine the seismic soil pres
340. pecified at equal time intervals Besides the total number of points in the time histories must be a power of 2 Maximum number of Fourier or time history points is 32 768 5 The seismic analysis option and the external force analysis option cannot be applied at the same time 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 17 ACS SASSI MAIN User Manual 18 1 5 3 Finite Element Library Description The current finite element library includes the following element types e Three dimensional SOLID element eight node soil or brick with three translational degrees of freedom per node This element may also include nine incompatible displacement modes in this element when it is used to model the structure e Three dimensional BEAM element with three translational and three rotational degrees of freedom per node e Four node quadrilateral PLATE SHELL element with three translational and three rotational degrees of freedom per node e Two dimensional four node PLANE strain finite element with two translational degrees of freedom per node e Three dimensional SPRING element with three translational and three rotational degrees of freedom per node e Three dimensional generalized STIFFNESS MASS matrix element with three translational and three rotational degrees of freedom per node 1 5 4 Soil Non Linear Hysteretic Behavior 1 Using SSI substructuring methods the ACS SASSI code solution is restricted to
341. pendent global mass and stiffness matrices for both structure and excavated soil Two separate finite element models are constructed one for the structure and the other for the excavated volume of soil The SSI models can share the same nodal points at below the ground surface The nodes that define the excavated soil volume are called interaction nodes The finite element library includes see GROUP instruction section 5 3 16 page 195 Type Description SOLID 1 3D eight node solid element with or without incompatible modes BEAMS 2 3D beam element SHELL 3 3D four node quadrilateral plate shell element PLANE 4 2D four node plane strain solid element SPRING 7 3D spring element 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 78 ACS SASSI PREP User Manual 79 GENERAL 8 3D stiffness mass generalized element The excavated soil zones are modeled using the SOLID or PLANE element types No incompatible modes are included for the excavated soil elements The finite element models of the structure and the excavated soil must be selected in such a way that every interaction node below the ground should lie on a soil layer interface ACS SASSI HOUSE reads the nodal point input data nodal types soil layer properties and element data for the structural and excavated soil elements then forms the element mass and stiffness matrices for these elements which are later assembled into correspond
342. perties of halfspace are added to the soil profile The wave length A is the shear wave length in halfspace and is a function of frequency Thus the added soil layer thickness varies with frequency The choice of 1 5A arise from the observation that fundamental modes of Rayleigh wave in halfspace decay with depth and essentially vanish at a depth corresponding to 1 5A Furthermore the 1 5A layer thickness is subdivided into n layers with increasing thickness with depth The use of 20 half space layers is suggested to provide best numerical accuracy to half space simulation With this technique the layer thickness will increase with depth and decreasing frequency This layering is the desired characteristic of the model since surface wave mode shapes decrease exponentially with depth and since their depth of penetration increase with decreasing frequency The soil model with added extra layers is further improved by replacing the rigid boundary at the base of the extended layer system with viscous boundary by placing dashpots in horizontal and vertical directions The halfspace simulation is specified in program module SITE 4 2 ACS SASSI RUNS The first step in running the code is to determine to which of the following three groups the problem belongs a lnitiation SSI Solution Runs b Post SSI Solution Runs c Restart or Reanalysis SSI Solution Runs Therefore the next step would be to perform the operations of the corresponding group describe
343. plings between incoherent mode responses The SRSS TF approach validated by the 2006 2007 EPRI studies for the ISRS computation does not appear to be highly suitable to compute forces and stresses in structures Sometime its results indicate significant instabilities that show unrealistically high or low structural stress force results The ACS SASSI can be also used to apply the SRSS approach used in 1997 EPRI report Tseng and Lilahanand 1997 This approach is called herein SRSS FRS The SRSS FRS uses SRSS to combine end results computed for different incoherent modes that is applicable to ATF ISRS maximum displacements or ZPAs This is different than SRSS TF used in 2007 EPRI report Short et al 2007 that uses SRSS to combine the ATF amplitudes of different incoherent modes The ATF with the SRSS combined amplitudes are then used to compute ISRS The incoherent ATF phases for each mode are neglected It should be noted that SRSS FRS approach does not produce unstable structural stress force results WARNING For flexible foundation SSI models the number of the required incoherent modes in the SRSS approaches could be very large tens or even hundreds that makes the SRSS approaches highly impractical for complex SSI model problems WARNING The user should be very cautious when applying any of the EPRI incoherent SSI approaches validated for computing ISRS for computing incoherent forces in structures EPRI made no study and provided no
344. ptions allow you to customize the active Spectrum Plot window Acceleration Axis Set the Logarithmic check box set the acceleration axis to logarithmic and the Show Ticks to show ticks on the acceleration vertical axis 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 125 ACS SASSI PREP User Manual 126 Frequency Axis Set the Logarithmic check box set the frequency axis to logarithmic and the Show Ticks to show ticks on the frequency horizontal axis Spectrum Curves Use the check boxes to enable disable curves for plotting Spectrum Post Processing This option includes three post processing options Averaging Response Spectra for a set of up to 15 spectral curves Broadening and Enveloping Response Spectra for a set of up to 15 spectral curves If the Peak Difference is selected to be a certain percentage for selected multiple spectral curves then the spectral valley bridges are made only for the spectral peaks that do not differ more than the selected difference certain selected percentage If Broaden is selected to be a certain percentage that percentage is used to broaden the spectral peaks of selected spectrum files We recommend to use a larger number of frequencies at least 200 frequencies for the RS calculations when broadening option is applied Superposition of Three Directional Effects using i the weighted linear combination and ii the SRSS rule For Linear Combina
345. put file will be written by the ACS SASSI PREP and the output file by the corresponding module To view the output file use the File Open command see section 6 2 1 page 61 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 78 ACS SASSI MAIN User Manual 79 Analysis Files PINT FORCE ANalys comen OK MOTION STRESS AELDISP EQUAKE SOIL LIQUEF SITE POINT HOUSE __ Cancel Input File Postfix and Extension Help Lequ Output File Postfix and Extension _equake out 6 5 3 Change Font for the Active Window Select Font from the Options submenu Use this command to set the font of the active view window using the Choose Font dialog box Font HEI Font Font style Size Regular fi 0 A A Cancel Letter Gothic T MS LineDraw Sample haBbYyZz The following options allow you to customize the font for the active window Font Select the font name from this list only fixed pitch fonts allowed Font Style Select the font style from the list box Size Select the font size from the list box 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 79 ACS SASSI MAIN User Manual 80 Sample Shows a text sample using the current font settings 6 6 WINDOW SUBMENU Model File Run RunAll Options BAMGEET View Help H ZJE gai yE Tile Horizontally Tile Yerticaly Cascade Arrange Icons Close Close All
346. put in a free format the following information see example shown below in the figure 1 line Number of nonlinear soil element groups effective strain factor number of soil material curves defined in SOIL soil constitutive model 2 line Number of the nonlinear soil element group number of materials could be equal with the number of layers or not in the group and number of solid elements in the group 3 line and after define a loop over the number of soil materials with each line including Initial shear modulus reduction factor 1 00 indicates same shear modulus as in free field initial damping ratio factor 1 00 indicates the same damping as in free field soil material curve order number The block of lines after 1 line needs to be input for all nonlinear soil element groups The figure below is shown an example with a single group of nonlinear soil elements an effective strain factor of 0 60 and 2 soil material curves The order number of the nonlinear soil group is 2 the number of soil materials in the group is 5 and total number of elements in the group is 180 NOTE This nonlinear SSI capability could be extended to any nonlinear solid element group not for the soil material only for example for rubber materials used for structure isolation In this case the user has to add a new rubber material pair of constitutive curves G gamma and D gamma in the text file FILE73 produced by the SOIL module The STRESS module will u
347. puted dynamic stiffnesses viscous damping coefficients effective damping ratios and absolute value of impedance functions respectively Calculations of the unconstrained global impedances are based on the integration of nodal point impedances assuming rigid body linear displacement shapes for the foundation motion in 3D space This option is active only for 3D SSI models with or without embedment WARNING For embedded SSI models the global impedance calculations works ONLY for the FI FSIN method The unconstrained global impedances are different than the rigid foundation based global impedances Only for surface models the unconstrained global impedances are the same with the rigid foundation based global impedances The unconstrained global impedances include only the contribution of the local soil stiffnesses basically it is like assuming that the foundation is infinitely flexible If a two step SSI analysis is desired by the analyst then in the 2 step the use of the unconstrained global impedances for embedded models as lumped parameters is not possible These unconstrained global impedances for embedded models can be used only to further compute the frequency dependent distribution of the local soil spring dashpot elements under and surrounding the foundation For a two step SSI approach we strongly recommend the use of the Option A capability that is a much more accurate theoretical approach as described in
348. r otherwise all displayed text is transparent Vertical Axis Select the vertical axis from X Y and Z 3 5 16 Time History Plot Window Settings Time History Window Settings Acceleration Axis OK Cancel I Show Ticks Help Time Axis MV Show Values M Show Ticks Number of Time Values Minimum Time Maximum Time 20 48 Combine Add T ime Historys The above window is used to select the plot options for time history plots and to algebraically add combine up to 10 time histories that have the same length and time step 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 122 ACS SASSI PREP User Manual 123 The following options allow you to customize the active Time History Plot window Acceleration Axis Set the Show Values check box to show the values and the Show Ticks to show ticks on the acceleration vertical axis Time Axis Set the Show Values check box to show the values and the Show Ticks to show ticks on the time horizontal axis The Number of Time Values displays the number of values shown on the time axis The Minimum Time and Maximum Time edit boxes are used to zoom the time history plot around a point of interest To reset the zoom set these values to zero Combine Add Time Histories When the button is pressed the user will be asked to input a filename where the combined time history file will be saved When the OK button is pressed the new file will be created and
349. r Manual 36 E Afwrite Batch Options Number of Partitions 5 COMBIN Module C ACS 230 EXEB Combinb exe lt lt SITE Module C ACSY230 EXEB Siteb exe ec POINT Module CHACSY230 EXEB Point3b exe lt lt HOUSE Module C ACSV230 EXEB Houseb exe ge ANALYS Module CHACSY230 EXEBAnalysb exe i Afwrite Cancel The Batch Afwrite Pop up Window These folders can be found in the model directory as shown in the screen below The the SSI model name is BellnssOld amp Bellnssold Eak Fie Edit wiew Favorites Tools Help Back E ra Search Key Folders E Address a Name Type File and Folder Tasks 4 set1 File Folder 9 Make a new folder set2 Folder sets File Folder Us oe folder to sets File Folder E Share this folder sets File Folder xt zz ile E ext ZZ Fil aPioo0 File Other Places E BellNssOld amp AMP File es BellNssOld anl ANL File B Test E BellNssOld cdl CDL File G My Documents E BellNssOld cor COR File Shared Documents E BellNssOld csy CS File BellNssOld elm ELM File BellNssOld eop EOP File BellNssOld err ERR File BellNssOld frq FRQ File la BellssOld hou HOU File vi lt Model Directory ig My Computer My Network Places Details Each one of these folder contains a Runbatch bat file This file will batch run the SITE 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies
350. r any restart For seismic analysis ANALYS can run simultaneously the all three X Y and Z direction inputs For external forces ANALYS can run simultaneously up to 9 external forcing load cases For more details please see the ACS SASSI PREP user manual Section 3 5 10 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 30 ACS SASSI MAIN User Manual 31 10 Module MOTION The MOTION module reads the transfer functions from FILE8 and performs an efficient frequency domain interpolation using a complex domain scheme based on the 2 DOF complex transfer function model that has five parameters to be determined The input file has extension mot and it is created by the ACS SASSI PREP AFWRITE command The interpolated transfer functions are then used to compute the SSI response motions at a set of nodes selected by the user Acceleration velocity or displacement response spectra may be requested in different location points and degrees of freedom The MOTION module requires only FILE8 as input If the baseline correction option is used this produces a significantly more approximate solution for relative displacements in a structure than using the RELDISP module the nodal point motions including acceleration velocity and displacements are saved in the FILE13 text file The FILE13 format includes 4 columns which provides as each time step the accumulated time the absolute acceleration absolute velocity a
351. r i 9 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 128 ACS SASSI PREP User Manual 129 3 5 21 Set Colors for the Active Window Select Colors from the Options submenu Use this command to change the colors of the active window 3 5 22 Output Window Colors The following options allow you to customize the colors for the Outout window Normal Text Select this button to change the color for displaying normal text Instruction Echo Select this button to change the color for displaying instruction echo Errors Select this button to change the color for displaying error messages Warnings Select this button to change the color for displaying warning messages Use Color Formatting Set this option if you want ACS SASSI PREP to use the above listed colors otherwise it will display all text in the Output Window using the normal color Output Colors x Normal Text Instruction Echo Cancel Errors mm H Warnings M Use Color Formatting 3 5 23 Model Plot Window Colors The following options allow you to customize the colors for the active Model Plot window Symbol Color for Masses Select this button to change the color for displaying masses symbols Symbol Color for Boundary Conditions Select this button to change the color for displaying DOF symbols 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 129 ACS SASSI PREP User Manual 130
352. r number by selecting the Options Analysis command see section 3 5 3 Error 105 Illegal Number of Iterations e The number of iterations for ACS SASSI SOIL module is less than zero e Correct the number of iterations by selecting the Options Analysis command see section 3 5 3 Error 106 Illegal Strain Ratio e The strain ratio for ACS SASSI SOIL module is not between 0 and 1 e Correct the strain ratio by selecting the Options Analysis command see section 3 5 3 Error 107 No Damping Ratios Defined e There are no defined damping ratios for ACS SASSI SOIL e Define the damping ratios by selecting the Options Analysis command see section 3 5 3 Error 108 Illegal Multiplicator for Acceleration of Gravity e The multiplicator for the acceleration of gravity for ACS SASSI SOIL module is less than or equal to 0 e Correct the multiplicator for the acceleration of gravity by selecting the Options Analysis command see section 3 5 3 Error 109 Illegal Second Layer Number for Layer lt i gt 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 228 ACS SASSI PREP User Manual 229 e The second layer number for layer lt i gt for ACS SASSI SOIL module is illegal e Correct the second layer number by selecting the Options Analysis command see section 3 5 3 Error 110 Illegal Frequency Step for Layer lt i gt e The frequency step for layer lt i gt for ACS SASSI SOIL module i
353. ransform Nodes into the Global Coordinate System GLOBAL lt n1 gt lt n2 gt lt inc gt transforms the node set between lt ni gt and lt n2 gt with step lt inc gt into the global coordinate system This operation can be made using the GLOBAL instruction or is made automatically when writing the analysis file Note The GLOBAL instruction does not deactivate the local systems 5 2 5 Set Interaction Interface Intermediate or Internal Nodes INT lt n1 gt lt n2 gt lt inc gt lt set gt lt code gt sets interaction intermediate interface or internal nodes The node set is defined by start node number lt ni gt end node number lt n2 gt and step lt inc gt Depending on the value of parameter lt set gt this instruction sets lt set gt 1 or resets lt set gt 0 the nodes as interaction 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 184 ACS SASSI PREP User Manual 185 lt code gt 0 intermediate lt code gt 1 interface lt code gt 2 or internal lt code gt 3 This instruction is used after the nodes have been previously defined 5 2 6 List Interaction Interface Intermediate or Internal Nodes INTLIST lt n1 gt lt n2 gt lt step gt lt c1 gt lt c2 gt lt c3 gt lt c4 gt lists the set of interaction if lt c1 gt 1 intermediate if lt c2 gt 1 interface if lt c3 gt 1 and internal if lt c4 gt 1 nodes defined by lt n1 gt
354. re3 5 Coordinate systems in module SITE and HOUSE Coordinate Transformation Angle Type the coordinate transformation angle degrees the angle between the x axis of the local coordinate system as defined in the SITE module see Analysis Options SITE dialog box see section 3 5 6 and the x axis of the global coordinate system For example for vertically propagating SV waves with motion in X direction the input in SITE is x and in ANALYS is zero degree If vertically propagating SH waves are input for the motion in Y direction then the input direction in SITE is y direction and coordinate angle in ANALYS is zero degree For vertically propagating P waves with motion in Z direction the input in SITE is z and the coordinate angle in ANALYS is zero degree For vertically propagating SV waves with motion in Y direction the input in SITE is x and coordinate angle in ANALYS is 90 degree Wave Passage Select this button to enable the wave passage option This option is the same as set in the Analysis Options HOUSE dialog box see section 3 5 8 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 97 ACS SASSI PREP User Manual 98 Global Impedance Calculations Unconstrained Choose between No Calculations Calculate Only Diagonal Impedances and Calculate the Full Rigid Body 6x6 Impedance Matrix The second choice produces four text files FOUNSTIF FOUNDASH FOUNDAMP and FOUNIMPD that includes the com
355. recommendations for the evaluation of incoherent forces in structures The use of the stochastic simulation approach with no TF phase adjustment for incoherent forces is believed to be more appropriate than the use of other deterministic incoherent approaches The stochastic simulation approach with no TF phase adjustment is identical to the Monte Carlo simulation approach that is widely accepted in industry and academia for various engineering application fields However sensitivity studies without and including TF phase adjustment are recommended if only a single seismic acceleration time history input is used for structural seismic design The decision for considering or not the TF phase adjustment should be based on the analyst engineering judgment since at this time there is no engineering standards or regulatory requirements providing any guidance on this aspect The deterministic AS and SRSS approaches implemented in ACS SASSI could either under or overestimate incoherent SSI responses due to the neglection of the coherency kernel modal response couplings that could occur for complex SSI models with flexible foundations WARNING The user should be aware that for multilevel excavation volume meshes that have inclined node walls with respect to the vertical plane or maybe other particular situations the coherency matrix could be ill conditioned For such situations the incoherent modes can be determined separately for each embedment level an
356. ries based on the absolute acceleration transfer functions ATF obtained by MOTION in complex frequency Output Control Select the type of response from Output Only Displacements Output Only Velocities and Output Only Accelerations Only accelerations can be requested for seismic problems Output Only Transfer Functions If this option is set only transfer function printed plots can be requested at nodal points and time history of input motion need not be supplied Save Complex Transfer Function If this option is set then amplitude and phase of the computed transfer functions TF are saved in TFU and TFI files This option is not recommended for typical SSI analysis since the information on the Fourier phase is often difficult to interpret from engineering point of view Save FILE13 Type 1 if you would like to save the baseline corrected absolute acceleration velocity and displacement time histories in FILE13 If no baseline correction is selected no FILE13 will be generated For full post processing of large size models the FILE13 size can become extremely large Therefore for typical SSI analyses we recommend not to save FILE13 Total Duration to Be Plotted Input the total duration of time history to be plotted Incoherent SRSS Allows the user to create a file SRSSTF txt that will be read used for incoherent SSI analysis using the SRSS TF deterministic approach This file is needed if the Quadratic option was selected for incoh
357. rix are used respectively 16 Material damping is introduced by the use of complex moduli which leads to effective damping ratios which are frequency independent and may vary from element to element 1 5 2 Dynamic Loading 1 The seismic environment may consist of an arbitrary three dimensional superposition of inclined body and surface seismic waves 2 Earthquake excitation is defined by a time history of acceleration that is called control motion The control motion is assigned to one of the three global directions at the control point which lies on a soil layer interface Either coherent and incoherent input motions with or without including wave passage effects can be considered For incoherent motions several plane coherency models can be used for different soil conditions 3 In addition to seismic loads it is possible to introduce external forces or moments such as impact loads wave forces or loads from rotation machinery acting directly on the structure The external forces are applied at the nodal points and are assumed to have similar time histories However it is possible to assign different maximum amplitudes and arrival times for each dynamic load applied at a nodal point This feature enables the program user to define moving dynamic loads on the structure 4 Transient input time histories such as earthquake record or impact loads are handled by the Fast Fourier Transform technique Therefore the time histories must be s
358. roblems the standard solver becomes numerically inefficient on typical PCs with 16GB RAM since the SSI analysis runtime and the disk storage go up out of hand The ACS SASSI Version 3 0 fast solver code called Option FS has been extensively verified tested and used for coherent seismic 3D SSI models up to 100 000 nodes including up to 35 000 interaction nodes The fast solver code is much more numerically efficient than the standard solver code The ACS SASSI Version 3 0 fast solver code has two major SSI problem size limitations for current MS Windows PC platforms 1 MS Windows OS limitation The maximum accessed RAM for the SSI problem is limited to 192 GB RAM for Windows 7 and 512 GB RAM for Windows 8 respectively and 2 ACS SASSI limitation The total node number should be less than 100 000 The governing limitation of the SSI problem size is due to the MS Windows OS limitation On MS Windows PCs with 16 GB RAM SSI problems with sizes up to 100 000 nodes including up to 8 000 interaction nodes can be run efficiently with the fast solver using the in core SSI solution algoritm For the SSI problems including larger size models with more than 80 000 nodes and 8 000 25 000 interaction nodes MS Windows PCs with RAM ranging from 32 GB up to 192 GB are recommended For large size SSI problems with more than 20 000 30 000 interaction nodes MS Windows 8 PCs with up to 512 GB RAM are recommended The fast solver code is limited to arbitrary 3D S
359. rous stochastic simulation approach that is called Simulation Mean approach included in the 2006 2007 EPRI validation studies There are seven plane wave incoherency models incorporated into the code the Luco Wong model 1986 theoretical unvalidated model and five Abrahamson models empirical isotropic or anisotropic based on the statistical dense array records The Abrahamson models include the coherency models published in 1993 2005 all sites surface foundations 2006 all sites embedded foundations 2007a rock sites all foundations 2007b soil sites surface foundations and user defined coherency models The new ACS SASSI version includes directional or anisotropic Abrahamson coherency models in addition to the currently implemented isotropic or radial Abrahamson coherency models Also it includes user defined coherence functions that can be different in two orthogonal principal horizontal directions The user defined plane wave coherency models could be useful for particular sites for which more detailed seismological information is available or for sensitivity studies For the SSI applications with elastic foundation FE models only the stochastic simulation approach should be used The AS and SRSS deterministic approaches are simplified incoherent SSI approaches that have only a limited application to rigid base mat SSI models as validated by EPRI Thus the deterministic approaches are not directly applicable to elastic f
360. rovided for input files To set the analysis options for the ACS SASSI POINT module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 7 page 74 5 1 29 Quit the ACS SASSI PREP Pre Processor Q closes ACS SASSI PREP pre processor Note This instruction is overridden by the Model Exit command see section 3 1 6 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 172 ACS SASSI PREP User Manual 173 5 1 30 Re Load the Active Model RESUME re loads the model data You may use this instruction to cancel the instructions which were run after the last save action When an existing model is activated ACS SASSI PREP loads the model data automatically 5 1 31 Repeat the Last Instruction RP lt nn gt lt ine1 gt lt inc2 gt lt inc20 gt repeats the previous instruction except another repeat instruction lt nn gt times nn must be between 1 and 99 Parameters 1 20 specify the increment that will be applied to the parameters of the previous instruction 5 1 32 Set the Response Spectrum Input File for ACS SASSI EQUAKE Module RSIN lt no gt lt file gt sets the response spectrum input file number lt no gt for ACS SASSI EQUAKE module to lt file gt Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQAUKE module from the ACS SASSI PREP desktop use the Options Analysis command see sect
361. rsional area moment of inertia J and shear correction coefficient f2 3 for solid rectangular and circular beam cross sections The section properties of some mostly used cross sections are given above If shear deformations are not going to be included in the analysis let lt shear2 gt and lt shear3 gt be zero 5 3 38 Set Active Real Spring Matrix Property Index RACT lt index gt sets the active real spring matrix property index to lt index gt All elements defined after this command and before another RACT command will have the property index automatically set to lt index gt 5 3 39 List Real Properties RLIST lt r1 gt lt r2 gt lt step gt lists the table of real properties between lt r1 gt and lt r2 gt default last defined with step lt step gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 202 ACS SASSI PREP User Manual 203 default 1 5 3 40 Set Element Real Spring Matrix Property Index RSET lt e1 gt lt e2 gt lt inc gt lt index gt sets the real spring matrix property index to lt index gt for the elements in the active group from lt e1 gt to lt e2 gt default lt e1 gt with step lt inc gt default 1 If the active group is of type BEAMS then the index refers to the real property table If the active group is of type SPRING then the index refers to the spring property table If the active group is of type GENERAL
362. run to create FILE77 before ANALYS is run If simulation approach is used for incoherent SSI then SITE does not need to be run again but only HOUSE The restart files for the baseline software are files FILE5 and FILE6 extensions n5 and n6 For the fast solver code the restart files are COOXxxx and COOTKxxx Additional files needed are COOXI COOTKI DOFSMAP FILE90 and FILE91 4 2 6 New Dynamic Loading This mode which can be performed only for the foundation vibration problems consists of the following two runs 1 FORCE run 2 ANALYS run restart for New Dynamic Load for baseline code not available for fast solver code The new FILE9 obtained from the FORCE run is used as input for ANALYS run ANALYS run then creates a new FILE8 4 2 7 New Seismic Load Vector in the LOADXxxx or LOADXYZxxx files This mode consists of running ANALYS only after the seismic load vector is modified by the user and has a special application for particular cases of incoherent analysis of embedded structures See Section 3 2 for more details 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 52 ACS SASSI MAIN User Manual 53 5 GETTING STARTED To start working with an application model the database must be initialized Then the analytical model must be built using input data The procedure is the following 1 Run the ACS SASSI MAIN application 2 Once the ACS SASSI MAIN window is open
363. s The lack of restart analysis for performing SSI analysis for multiple seismic inputs implies that for the incoherent SSI analysis using a stochastic simulation approach the computational speed is increased by 3 times In comparison with the previous version since the incoherent SSI analysis are solved in a single restart run per incoherent sample for the three input directions instead of 3 restart runs one restart run for each input direction For external forces the new version can run 9 load cases in a single run with no restarts required Because of these features the new version is at least 3 times faster for external force cases than the previous version Note For the moment fast solver is not applicable to 2D SSI models and symmetric models but only to 3D SSI models with arbitrary geometries The ACS SASSI ANSYS interfacing capability covers an area that was uncovered up to now for practical engineering applications This capability provides an advanced two step SSI approach that can include more refined FEA structural models in the second step including some local nonlinear material and or nonlinear geometric effects in the structure or at foundation interface with the soil There are two ACS SASSI ANSYS interfacing options i Option A or ANSYS and ii Option AA or Advanced ANSYS Demo problems are provided to help users understand how to best use the ACS SASSI ANSYS interface using Options A and AA OPTION ANSYS
364. s at frequency solution points between the Fourier amplitudes of the local motion for each isolated foundation or zone with respect to the reference motion computed by SSI analysis for the single input control motion The number of ratios must be equal to the number of SSI frequencies Use blank tab or as separators The phasing effects due to the differential motions can be included only if the fast solver version is used An example of the use of the multiple seismic input excitation option is shown in the V amp V Problem 35 or the NQA software version WARNING Usually the Fourier amplitude amplification factors are different for X Y and Z inputs depending on the soil layering configuration below the foundation Thus the HOUSE input files hou files for the X Y and Z inputs should be different since they include different spectral amplification factor values Nonlinear SSI Input Data Click this button to enter data for nonlinear SSI If the nonlinear SSI analysis is used then the user needs to click on the Nonlinear SSI Input Data to define the input for the initial soil properties for the near field soil element groups By clicking the 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 90 ACS SASSI PREP User Manual 91 Nonlinear SSI Input Data a new input file is opened for editing C ACSV21 Problem14 Problem14 pin OK This file has extension pin The user needs to in
365. s a negative value e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 218 ACS SASSI PREP User Manual 219 Error 50 Illegal Number of Values for Fourier Transform e The number of values for Fourier Transform has a negative value e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 51 All Wave Fields Are Deselected e All wave field options are deselected e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 52 Illegal Incident Angle of Wave lt w gt e The incident angle of wave lt w gt is not in the range 0 360 degrees e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 53 Illegal Value for Frequency lt i gt e The value for frequency lt i gt of ratio curve is less than or equal to zero e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 Error 54 Illegal Value for Wave lt w gt Ratio at Frequency lt i gt e The value for the wave ratio at frequency lt i gt is less than or equal to zero or is greater than 1 e Set the analysis parameters by selecting the Options Analysis command see section 3 5 3 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 219 A
366. s directory This method requires a lot of space on disk if the model is large but the model can be reloaded very quickly If you want to keep the model only for further reference the model will not be used often you can produce an input file using the WRITE instruction The file lt file gt is an ASCII file in which data is stored in PREP instructions When you need to reload the model type INP lt file gt and the model s files will be rewritten 5 1 53 Relative Displacement Options RELD lt RelDisOutput gt lt RelDispSAIl gt lt RelDisoNumFiles gt lt RelDisOutput gt User requested output type lt RelDispSAll gt Flag that overrides the output node list and puts all node components into the output list when the rdi is written also tells the RELDISP module to make frames for 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 181 ACS SASSI PREP User Manual 182 displacement lt RelDispNumFiles gt is the number of file names in the Output node list 5 1 54 Relative Displacement Reference File RELF lt FileName gt Reference path name lt FileName gt 5 1 55 Adda node to the Relative Displacement Output List RDND lt NodeNum gt lt X gt lt Y gt lt Z gt lt NodeNum gt is the number of the node to be added to the Output List lt X gt lt Y gt lt Z gt are the Degrees of Freedom to be Listed If lt 1 the Degree of freedom is to be ignored else the Degree of
367. s dnd clueecandcan tana deceieaaa iit sees 173 5 1 32 Set the Response Spectrum Input File for ACS SASSI EQUAKE Module 173 5 1 33 Set the Response Spectrum Output File for ACS SASSI EQUAKE Module 173 5 1 34 Set the Acceleration Output Options for ACS SASSI SOIL Module 174 5 1 35 DAVE Active MOGEI eiciac iarna anne aaa iaa EEA EE AEREAS 174 5 1 36 Set the Fourier Spectrum Output Options for ACS SASSI SOIL Module 174 5 1 37 Define the Analysis Options for ACS SASSI SITE Module ccceeeeees 175 5 1 38 Define Analysis Options for ACS SASSI SOIL Module cccccseeeeeeeeeeeee 176 5 1 39 Define Soil Profile Data for ACS SASSI SOIL Module ccccccccecseeeeeeeeeeeee 176 5 1 40 Set the Response Spectrum Output Options for ACS SASSI SOIL Module 177 5 1 41 Set the Spectral Amplification Factor Output Options for ACS SASSI SOIL MOGUIG EAEn E E E E E S 177 5 1 42 Set the Stresses and Strains Output Options for ACS SASSI SOIL Module 178 5 1 43 List General Information cccccccccccececeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeess 178 5 1 44 Define Analysis Options for ACS SASSI STRESS Module cseee 178 5 1 45 Set Information for Symmetry Anti Symmetry Plane Line eee 179 Copyright 2014 by Ghiocel Predictive Technologies Inc 4 ACS SASSI PREP User Manual 5 5 1 46 Set Acceleration Time History
368. s less than or equal to zero e Correct the frequency step by selecting the Options Analysis command see section 3 5 3 Error 111 Illegal Number of Smoothenings for Layer lt i gt e The number of times the spectrum is to be smoothened for layer lt i gt for ACS SASSI SOIL module is less than zero e Correct the number of smoothenings by selecting the Options Analysis command see section 3 5 3 Error 112 Illegal Number of Values to Be Saved for Layer lt i gt e The number of values to be saved for layer lt i gt for ACS SASSI SOIL module is less than zero e Correct the number of values to be saved by selecting the Options Analysis command see section 3 5 3 Error 113 Illegal Apparent Velocity for Line D e The apparent velocity for line D is less than or equal to zero e Correct the apparent velocity for line D by selecting the Options Analysis command see section 3 5 3 Error 114 Illegal Directional Coherence Factor e The directional coherence factor is less than zero e Correct the directional coherence factor by selecting the Options Analysis command see section 3 5 3 Error 115 No Multiple Excitation Data Defined 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 229 ACS SASSI PREP User Manual 230 e The multiple excitation option is selected but no data is defined e Define multiple excitation data or deselect the option by selecting the Options Analysis
369. s no Elements Check found group lt g gt with no elements This is not an error AFWAITE see section 5 1 4 will skip this group when writing the analysis file Warning 8 Too Many Top Layers 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 231 ACS SASSI PREP User Manual 232 The top layer list from module SITE has more than 100 soil layers Only the first 100 are written Warning 9 Number of Values for Fourier Transform Is Not Power of 2 The number of values for Fourier transform must be a power of 2 ACS SASSI PREP writes the nearest power of 2 to the analysis files Warning 10 Force in Node lt n gt Is on Fixed DOF You defined a force that corresponds to the node lt n gt which has fixed DOF in the model or will be generated by AFWRITE see section 5 1 4 This is not an error but the analysis program will not take that force into account Warning 11 Moment in Node lt n gt Is on Fixed DOF You defined a moment that corresponds to the node lt n gt which has fixed DOF in the model or will be generated by AFWRITE see section 5 1 4 This is not an error but the analysis program will not take that moment into account 6 ERRORS AND WARNINGS Copyright 2014 by Ghiocel Predictive Technologies Inc 232
370. s of elements that each contain a layer of elements that corresponds to a far field soil layer Thus the number of excavation volume groups should be equal to the number of embedment layers The groups should be numbered from top surface to the bottom of excavation volume foundation level The Demo 5 problem includes a good SSI input example for modeling for an embedded structure please see carefully see the Demo5 pre file WARNING As an extra caution when building a embedded SSI model the user should always check that the SOLID elements in the excavation volume have the correct soil layer number assignments in the HOUSE output file before the SSI analysis is run It should be noted that the HOUSE or HOUSEFS module includes powerful numbering optimization capabilities that improve the computational speed of SSI analysis and reduces significantly the required RAM for performing SSI analysis This optimization option can be 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 80 ACS SASSI PREP User Manual 81 handled through the SUBMODELER Options Analysis HOUSE window or directly by typing in the HOUSE input file the hou extension text file generated by the AFWRITE command More information on the HOUSE node numbering optimization is provided in Chapter 3 page 30 of the MAIN manual The Problem 31 of the Verification Manual describes and validates the use of the HOUSE optimizer The optimizer is automatic
371. s the original nodes and the corresponding new node numbers after optimization is applied The user should use the hounew node numbers for post processing WARNING If the node numbering optimizer is used the new node numbers should be used to select the MOTION and RELDISP node outputs The optimized model input is described in the hounew extension input file that is used for creating FILE4 for SSI analysis 7 Module PINT Not available in this version 8 Module FORCE The FORCE module forms the load force vector for external load cases The input file has extension frc and it is created by the AFWRITE command This module is not used for seismic problems except for computing foundation impedances The external loads may correspond to impact forces rotating machinery or simple unit forces to be used to determine the impedance of a flexible foundation The results are stored in FILE9 If multiple load cases are used in a single SSI batch run for ANALYS that will save substantial run time then the FILE9 file obtained after each load case run using the FORCE module should be copy to a new file that has the same name FILE9 with the number of the load case appended to it such the FILE91 FILE92 FILE93 FILE99 Only one digit load case number can be appended to FILE9 9 Module ANALYS 3 DESCRIPTION OF SSI MODULES Copyright 2014 by Ghiocel Predictive Technologies Inc 29 ACS SASSI MAIN User Manual 30 The ANALYS module computes
372. se these new curves for performing the nonlinear rubber analysis using the iterative equivalent linear procedure Optimize Model only in SUBMODELER Check box to enable the node numbering optimization ANSYS Model Input only in SUBMODELER Check box if the ANSYS structural model is directly used for the SSI analysis as described in Option AA Advanced ANSYS Option AA is available only for the fast solver version 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 91 ACS SASSI PREP User Manual 92 The user needs to further select if the ANSYS Model Type that will be used for SSI analysis in ACS SASSI is a surface or a embedded model WARNING If the Option AA is used the user is required to copy all the ANSYS model related files in the SSI working directory as described in the ACS SASSI ANSYS Integration Capability User Manual 3 5 9 Set the Analysis Options for the ACS SASSI FORCE Module For each specified frequency the ACS SASSI FORCE module forms the elements of the load vector which correspond to external forces such as impact and rotating machinery acting directly on the structure The results are stored in File9 The following options allow you to specify the analysis options for ACS SASSI FORCE module Operation Mode Select the operation mode from Solution and Data Check Acceleration of Gravity Type the acceleration of gravity The value is the same as set in the Analysis Options
373. slation ccccceeeeeeeeeeeeeeeeeeeeeeeeeees 209 5 4 21 List Translational and Rotational MASS6S cccccccceccceeeeceeeeeeeeeeeeeeeeeseeeeeeaes 209 5 4 22 Modify a Translational MASS c ccceeeeeeeeeeeeeneeeeeeeeeeeeeeeeeceeaeeeeeeeeeeeeeeeeaeees 209 5 4 23 Scale Translational MaSS S ccccccccccscccceeeeceeueceseeusesueeseseueeeeeeeeueeeaeeaeeeasens 209 5 4 24 Set Units for Translational and Rotational MassSes ccccccccceseecsseeeeseeeeeeseees 210 6 ERRORS AND WARNINGS eee ete oot ce et ae el it td ts eka Se od 211 va M m ni eO fos LOO Oa ERD SED UO WUE Ue EEO E OUR 211 eA WARNINGS oi toa tc ean ah oe Aa laa eae a eon tla a heaed ahead a ean Ait i RA 230 Copyright 2014 by Ghiocel Predictive Technologies Inc ACS SASSI PREP User Manual 8 1 INTRODUCTION ACS SASSI Version 3 0 is a state of the art highly specialized finite element computer code for performing 3D linear and non linear soil structure interaction SSI analysis for shallow embedded deeply embedded and buried structures under coherent and incoherent earthquake ground motions The ACS SASSI software is an extremely user friendly modern engineering software under MS Windows with a unique suite of SSI engineering capabilities ACS SASSI is equipped with two translators for converting inputs of structural finite element models from ANSYS CBD file ANSYS is a trademark of ANSYS Inc or original SASSI or SASSI2000
374. splays a list of currently open document windows at the bottom of the View menu A check mark appears in front of the document name of the active window Choose a title from this list to make its window active 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 142 ACS SASSI PREP User Manual 148 3 8 HELP SUBMENU ACS SASSI Prep Model File Batch Plot Options Window view P26 wid 1 SIOl5 Lala oI as j mo 6 Ale la L About AATA Aa ois m e eE eE 3 Output Wo active database List Help topics 3 8 1 View Help Topics Select Help Topics from the Help submenu Use this command to display the opening screen of Help From the opening screen you can jump to step by step instructions for using ACS SASSI PREP and various types of reference information Once you open Help you can click the Contents button whenever you want to return to the opening screen 3 8 2 Display About Window Select About from the Help submenu Use this command to display the copyright notice and version number of your copy of ACS SASSI PREP 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 143 ACS SASSI PREP User Manual 144 4 TOOL BAR BUTTONS 4 1 MAIN TOOL BAR To hide or display the tool bar choose the View Tool Bars command see section 3 7 3 Ww c F ce gt Os ja AH KENN KEHE R Action Creates a new model Opens an existing mod
375. ssor calculations can be done interactive or batch xiv Post SSI calculations can be performed for the SRSS superposition of the co directional effects from X Y and Z input runs for computing the ISRS maximum structural stresses forces and moments and or the maximum seismic soil pressure on walls and mat with or without including the soil static bearing pressure component These quick post SSI calculations can be done both interactive and batch The ACS SASSI NQA Version 3 0 has been tested verified documented and released under the 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 12 ACS SASSI PREP User Manual 13 Ghiocel Predictive Technologies Nuclear Quality Assurance Program which is in compliance with the requirements of 10 CFR50 Appendix B 10 CFR21 ASME NQA 1 ASME NQA 1 Addenda Subpart 2 7 The ACS SASSI NQA version comes with a complete set of software documentations that were developed under the quality assurance requirements of the GP Technologies NQA 1 Level Program The ACS SASSI NQA version documentation includes the user and verification manuals and the V amp V computer files for a large set of various seismic V amp V problems including shallow embedded and buried foundations rigid and flexible foundations piles subjected to various different seismic environments different surface and body seismic waves motion incoherency and directional wave passage along an arbitrary horizontal directi
376. story file from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 47 Set the Title for Acceleration Time History 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 179 ACS SASSI PREP User Manual 180 THTIT lt title gt sets the title for the acceleration time history to lt title gt Note This instruction is provided for input files To set the time history title from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 11 5 1 48 Set the Model Title TIT title gt sets the active model s title to lt title gt 5 1 49 Add Delete Top Layers for ACS SASSI SITE Module TOPL lt I1 gt lt l2 gt lt l3 gt lt l4 gt lt l5 gt lt I6 gt lt I7 gt lt l8 gt lt l9 gt lt 10 gt adds non zero parameters to top layers list for ACS SASSI SITE module or deletes the list if lt l1 gt is zero Note This instruction is provided for input files To set the top layers from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 50 Define Wave Information for ACS SASSI SITE Module WAVE lt type gt lt opt gt lt ratio1 gt lt ratio2 gt lt angle gt defines the following wave data for ACS SASSI SITE module lt type gt wave type 1 R wave 2 SV wave 3 P wave 4 SH wave 5 L wave lt opt gt wave field option 0 no wave field 1 wave field or shortest wave leng
377. story input file number lt no gt for ACS SASSI EQUAKE module to lt file gt Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQAUKE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 10 5 1 2 Set the Acceleration Time History Input File for ACS SASSI EQUAKE Module ACCOUT lt no gt lt file gt sets the acceleration time history output file number lt no gt for ACS SASSI EQUAKE module to lt file gt Note This instruction is provided for input files To set the analysis options for the ACS SASSI EQAUKE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 10 5 1 3 Activate an Existing Model ACT lt modelname gt activates the model lt modelname gt do not specify path from the active database Note This instruction is provided for input files To activate a model from the ACS SASSI PREP desktop use the Model Open command see section 3 1 5 5 1 4 Write the Analysis Files AFWRITE writes the analysis files for the selected ACS SASSI modules using the analysis options set by the Options Analysis command see section 3 5 3 See also Afwrite command section 4 1 1 Note Before writing the analysis file the program first runs a CHECK instruction See section 5 1 8 If there were any errors found excluding warnings the affected analysis files will not be written
378. structural systems placed in the basement such piping systems or equipments the lack of not using separate meshes can affect significantly the accuracy of their SSI responses WARNING For embedded structures problems its is always possible that numerically instabilities could occur at isolated frequencies This instability could occur for all SSI methods including the FV method and depends on the particularity of the problem We recommend that the user should carefully revise and understand SSI results by inspecting the computed acceleration transfer functions ATF at different node locations By inspecting the computed ATF at several nodal locations the frequencies that manifest solution instabilities should be identified The unstable computed results at those frequencies should be not be considered for interpolating the transfer functions in the MOTION and STRESS modules Sensitivity studies by considering adjacent frequencies to those suspected for spurious results are recommended for clarification The user can remove any frequency that appears to produce a spurious solution using the auxiliary interactive DOS code called Remove_Frequencies_from_FILE8 exe that is installed by default in the directory called C NACSV230A EXEC 14 Additional special attention should be given to basement modeling if near field soil elements are included in the basement model that includes both structural and soil elements This situation could 1 IN
379. sure frames in time or SRSS to include the three directional input effects Please note that to run the Restart options a Frame txt needs to be input Frame Selection Input The Frame Selection button opens a file Frames txt which is used by the STRESS module to generate stress and soil pressure frames The Frames txt file has the following format 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 116 ACS SASSI PREP User Manual 117 of Frames List of Frame Numbers of Soil Pressure Groups List of Soil Pressure Groups Enter all on the same line Frames txt Example oO Paes OTE O 8910 This input specifies to save frames 1 10 for stresses and calculate and save frames for soil pressures for 3 near field soil SOLID groups numbered group 8 9 and 10 NOTE If the ths files were computed using multiple STRESS runs then the ELEMENT _CENTER_ABS MAX_STRESSES TXT file header with number of groups and elements has to be reconstructed by the user for the entire model Otherwise the user will get incomplete stress frames 3 5 13 Set the Options for the Relative Displacement RELDISP Module Use this Dialog box to change the options for the Relative Displacement Module These Options will be written to a rdi file in the model directory To run RELDISP first the complex TFI files need to be computed using MOTION 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Tec
380. t lt ince gt lists the moments from the nodes between lt n1 gt and lt n2 gt with step lt inc gt default 1 If no parameters are specified all moments will be listed 5 4 10 Modify a Moment MMOD lt n gt lt fxx gt lt fyy gt lt fzz gt lt txx gt lt tyy gt lt tzz gt modifies the moment from node lt n gt for non zero values of moment factors lt fxx gt lt fyy gt lt fzz gt and moment arrival times lt txx gt lt tyy gt lt tzz gt This instruction works as the NMOD instruction from the Node Instructions group see section 5 2 15 with the difference that moments are modified 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 206 ACS SASSI PREP User Manual 207 5 4 11 Define a Rotational Mass MR lt n gt lt Mxx gt lt myy gt lt Mzz gt defines the rotational masses lt mxx gt lt myy gt and lt mzz gt in node lt n gt in weight units 5 4 12 Read Moments from File MREAD lt n gt lt r1 gt lt r2 gt lt dir gt lt opt gt lt file gt reads a set of moments from the file lt file gt The parameter lt n gt specifies the first node number for which to read data lt r1 gt and lt r2 gt specify the first and last record number to be read By default all records are read The parameter lt dir gt specifies the direction for which to load data and may have the values x y or z If lt opt gt 0 then the file must c
381. t ACS SASSI MAIN Select Exit from the Model submenu Shortcuts Mouse Double click the application s Control menu button 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 60 ACS SASSI MAIN User Manual 61 Keys Alt F4 Use this command to end your ACS SASSI MAIN session 6 2 FILE SUBMENU ACS SASSI MAIN Iof x Model Bun Runall Options Window View Help 2 R Open Ctrl 0 Print Setup Print Preview Print 1 e2c2_analys out 2D SASSI Tests E2C2 Da 3D SASSI 4a137_motion out 4D SASSI a137_analys out I EQUAKE Module T SOIL Module M LIQUEF Module I SITE Module D SASSI models sdb e2c2 6 2 1 Open an Existing File Select Open from the File submenu Shortcuts Tool bar Keys Ctrl O Use this command to open an existing text file typically output files generated by the ACS SASSI modules in a new window You can open multiple files at once Files may be opened also by using the File 1 2 3 4 command see section 6 2 5 page 65 Use the Window menu to switch among the multiple open documents see View 1 2 command see section 6 7 4 page 82 ACS SASSI MAIN displays the Open File dialog box 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 61 ACS SASSI MAIN User Manual 62 Open File Look in E e2c2 a 2c2 cdl ja e2c2 mas a e2c2 slr ja e2c2 csy ja e
382. t Data The Node List contains lists of nodes having the same output request Output requests in constrained directions are ignored Press the Add button to add a new node list the Edit button to edit the nodes of the selected list or the Delete button to delete the 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 104 ACS SASSI PREP User Manual 105 selected list Add Node List Ed fi 3 610 Baer You may use blank tab or as separators for the node numbers You may use to add a set of nodes to the node list For each node list and for each direction buttons X Y Z XX YY ZZ select the requested for output from the check boxes placed on right side of the Node List Printed Plot of Transfer Functions Save Time History of Requested Response Plot Time History of Requested Response Plot Acceleration and Velocity R S Save Acceleration and Velocity R S Print Maximum Requested Response The transfer function for seismic problems is defined for total acceleration response while for foundation vibration problems it is defined for total displacement response The requested response for seismic problems is acceleration for foundation vibration problems it is determined by the selected option from the Output Control group box The response spectra are computed independent of the option from the Output Control group box Therefore displaceme
383. t RS The EQUAKE module can be used to simulate acceleration histories with random phases or based on the so called seed records as described in the new ASCE 04 2014 standard In the latter case the simulated accelerograms preserve the Fourier phasing of the seed record components for X Y and Z directions The EQUAKE module uses also a baseline correction algorithm in complex frequency that is similar to the algorithm used in the FLUSH code The EQUAKE generated acceleration velocity and displacement time histories are saved in the text files with the extension acc vel and dis The user defines the file name for the acceleration time history Same name is used for velocity and displacement histories except the extensions The generated spectrum compatible input accelerations are in compliance with the US NRC requirements included in SRP 3 7 1 for single time history input Option 1 Approach 2 The applied SRP criteria include the following aspects Total motion duration is at least 20 seconds if input duration is less than 20 seconds a warning message will show up on screen and in the output file The Nyquist frequency is not higher than 100 Hz The maximum frequency is given by the time step size If the time step size is larger than 0 005 seconds a warning will show up on screen and in the output file Minimum 100 points per frequency decade are used between the lowest and the highest frequencies as defined in the
384. t and specifying the maximum embedment of the structure and also the radius of the point load in the poi input file This analysis yields the information on point load solution saved in FILE3 d Execute the HOUSE module based on the information of Steps 6 7 and 8 The HOUSE run yields for standard solver version to the complex stiffness and mass matrices of the structure and excavated soil that are saved in FILE4 If Option AA is used then HOUSE run will needs as inputs additional ANSYS model files as described in the ACS SASSI ANSYS Integration Capability User Manual e Execute the program module ANALYS using the FILE1 FILE3 and FILE4 n4 extension as inputs This analysis yields the impedance matrices the triangularized stiffness of the total system and the final transfer functions at requested frequencies and at all the nodal points in FILE8 The frequencies selected at this stage for interaction analysis are based on the information obtained from Steps 1 and 2 However in order to shorten the execution time of the program module ANALYS as well as limit the size of the scratch files generated by this program it is recommended to break the frequency range into several subranges whereby the analysis for each subrange is performed separately Step 11 Based on the results computed in Step 10 i e using the computed transfer functions compute the response of the system in time domain This analysis step usually consists of the fol
385. t f6 gt lt f7 gt lt f8 gt lt f9 gt lt f10 gt adds non zero parameters to frequency list of frequency set lt ndx gt or deletes the frequency set lt ndx gt if lt f1 gt is zero 5 1 18 Define Analysis Options for ACS SASSI HOUSE Module HOUSE lt gravity gt lt gelev gt lt opmode gt lt dim gt lt imp gt lt coh gt lt wpass gt lt me gt lt cmplxspec gt defines the following analysis options for ACS SASSI HOUSE module lt gravity gt acceleration of gravity lt gelev gt ground elevation lt opmode gt operation mode 0 complete solution 1 data check only 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 167 ACS SASSI PREP User Manual 168 lt dim gt analysis dimension 0 1D 1 2D 2 3D lt imp gt method of computing impedance matrix 0 direct flexible volume method 1 skin flexible volume method FFV in SUBMODELER lt coh gt soil motion 0 coherent 1 incoherent lt wpass gt wave passage 0 disable 1 enable lt me gt multiple excitation 0 disable 1 enable lt cmplxspec gt complex spectral amplification ratio 0 disable for the standard skyline solver 1 enable for the fast solver Note This instruction is provided for input files To set the analysis options for the ACS SASSI HOUSE module from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 8 5 1 19 Define
386. t files If the MOTION post processing restart option is used then additional text files for post processing are generated in the TFU RS and ACC subdirectories ACCR is included for rotational accelerations These frame text files contain the SSI response values computed for all active nodal DOF at each frequency step or time step These frame files are used by the ACS SASSI PREP module to create structural bubble plots TF vector plots contour plots or deformed shape animations See Table 2 for more details on frame text files In addition to the ACC frames MOTION also generates the ACC_max ixt files that contain the maximum acceleration or ZPA frame The MOTION module can be also used to generate response spectra for external acceleration histories that are listed in the CONTTRS file These external files need to have the same format with the ACC files that contain the acceleration histories computed by MOTION based on SSI analysis solution The external acceleration file names need to have the same extension ACC 11 Module RELDISP The RELDISP module uses the interpolated ATF computed by MOTION TFI files to compute the relative displacements at different selected nodes The input file has extension rdi and it is created by the PREP AFWRITE command RELDISP produces and output file with the computed maximum nodal relative displacements This module also produces extension TFD and THD files that contain the nodal relative displace
387. t motions The non uniform motion input is applicable to continuous foundations assuming that the free field motion complex amplitude varies in the horizontal plane after specific frequency dependent spectral patterns These patterns are described by the user using complex amplification factors at different borehole soil column locations computed with respect to the reference amplitude motion The non uniform motion assumption could be combined with motion incoherency and wave passage to create more realistic seismic environments The multiple support excitation option assume the existence of discrete isolated foundations such as bridge piers or multiple neighboring building foundations in a nuclear facility In the new version the differences between multiple input motions can be completely defined by nodal input complex amplitude transfer function rather than by a simple real amplitude scale factor as in the current version vi A new interpolation scheme for the complex responses was implemented The new interpolation scheme that uses bi cubic splines is recommended for complex FE models under incoherent seismic inputs The bi cubic spline interpolation should be applied only if the number of SSI frequencies is sufficiently large so that spectral peaks are not clipped by the smooth spline interpolation For such cases when number of frequencies is sufficiently large the bi cubic spline interpolation provides most accurate results for incoherent anal
388. th method for R waves 2 least decay method for R waves only lt ratio1 gt wave ratio at frequency 1 lt ratio2 gt wave ratio at frequency 2 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 180 ACS SASSI PREP User Manual 181 lt angle gt incident angle of wave degrees Note This instruction is provided for input files To wave information from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 51 Define Wave Passage Data for ACS SASSI HOUSE Module WPASS lt appv gt lt ang gt lt cohf gt defines the following wave passage data for ACS SASSI HOUSE module lt appv gt apparent velocity for line D lt ang gt angle of line D with x axis lt cohf gt directional coherence factor Note This instruction is provided for input files To define wave passage data from the ACS SASSI PREP desktop use the Options Analysis command see section 3 5 6 5 1 52 Write Model Data to an Input File WRITE lt file gt creates the file named lt file gt in which all existent data is stored as instruction lines so that the active model can be reloaded using the NP instruction see section 5 1 20 page 169 If the parameter is missing the file will have the model s name with the pre extension The default path for lt file gt is the model s path Once you have created and saved a model the data is stored in a sequence of files in the model
389. th respect to the reference node DOF in THD subdirectory 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 119 ACS SASSI PREP User Manual 120 Analysis Options ee e EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE MV SITE MV POINT V HOUSE FORCE V ANALYS 7 COMBIN I MOTION STRESS RELDISP 3 5 14 Set the Options for the AFWRITE and CHECK Instructions Use this dialog box to enable disable each of the ACS SASSI modules for the AFWRITE and CHECK instructions see sections 5 1 4 and 5 1 8 The generated input files will be placed in the active model s directory and their names will begin with the model s name followed by the corresponding postfix and extension as set from the ACS SASSI MAIN see ACS SASSI MAIN User s Manual 3 5 15 Set the Options for the Active Window Select Window Settings from the Options submenu Use this command to change the settings of the active window 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 120 ACS SASSI PREP User Manual 121 Output Window Settings The following options allow you to customize the Outout window Break Listing into Pages Set this option if you want all list procedures to be broken into pages After each listed page ACS SASSI PREP will ask if the listing procedure is to be continued Lines Page Type the numbers
390. that the PREP and SUBMODELER Converters are not a NQA feature of the code These converters may not be free of errors The user has to check carefully the converted pre files for translation accuracy before using them for the ACS SASSI SSI simulations The validation of the converted models is required WARNING The PREP and SUBMODELER Converters are not able of interpreting the fixed format hou file parameters for the HOUSE input for incoherent seismic inputs and general stiffness amp mass matrix elements 6 3 3 Run the ACS SASSI EQUAKE Module Select EQUAKE from the Run submenu Shortcuts Tool bar Keys F3 Use this command to run the ACS SASSI EQUAKE module for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI EQUAKE will be placed in the directory of the active model If the user wishes to use formatted input files without using the pre processor do not open a model and ACS SASSI EQUAKE will prompt for the input and output files In this case all files generated by ACS SASSI EQUAKE will be placed in the directory of the ACS SASSI EQUAKE module While ACS SASSI EQUAKE is running ACS SASSI MAIN sets the corresponding check box from the Status Panel see section 6 7 3 page 82 and displays the current status of module EQUAKE in the correspondin
391. the ACS SASSI ANSYS Integration Capability User Manual document Use Multiple Excitations Select this button for activating the multiple excitation or nonuniform seismic input option This option is the same as as set in the Analysis Options HOUSE dialog box see section 3 5 8 Input Motion Number Select the number of the active input motion All following data refers to this motion The input motion data is the same as described in the Analysis Options HOUSE dialog box see section 3 5 8 First Foundation Node Type the number of the first foundation node for the active motion node partition Last Foundation Node Type the number of the last foundation node for the active motion node partition see comments for the HOUSE module X Coord of Control Point not used in this version The X coordinate is used to define the input motion location application Y Coord of Control Point not used in this version The Y coordinate is used to define the input motion location application 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 98 ACS SASSI PREP User Manual 99 Z Coord of Control Point not used in this version The Z coordinate is used to define the input motion location application The ANALYS results are the computed complex acceleration transfer functions ATF in all degrees of freedom of the SSI model that are saved on FILE8 This FILE8 is used by MOTION and STRESS modules to comput
392. the New Structure Restart restart option in ANALYS input window Both FILE5 and FILE6 are required for New Seismic Environment restart option These database files can be up to hundreds of GBs for larger SSI models For the fast solver the FILE5 and FILE6 are replaced by the set of restart files named COOTKxxx and COOXxxx These restart files are saved separately for each frequency numbered xxx The following changes of problem parameters are required for different types of SSI restart or reanalysis a Change in the control motion MOTION restart Suppose results are required for a different time history or response spectrum of the control motion Then as long as the nature of seismic environment i e the type of wave field is not changed only the module MOTION has to be re executed b Change in seismic environment ANALYS restart option New Seismic Environment Suppose that structure was originally analyzed for the effects of vertically propagating SV waves and after that the user wants to input other types of waves for example vertically propagating P waves or Rayleigh waves causing the same motion at the control point as in the free field In these cases the SITE and ANALYS modules have to be re executed If the incoherency of seismic motion is used then the HOUSE module has to be re executed too to produce a new FILE77 The changes of motion incoherency modify the seismic loads on structure thus the HOUSE and ANA
393. the Node Instructions group see section 5 2 17 with the difference that moments are modified 5 4 18 Define a Translational Mass MT lt n gt lt mx gt lt my gt lt mz gt defines the translational masses lt mx gt lt my gt and lt mz gt in node lt n gt in weight units 5 4 19 Delete Translational Masses MTDEL lt n1 gt lt n2 gt lt inc gt deletes the translational masses from the nodes between lt n1 gt to lt n2 gt default lt n1 gt with step lt inc gt default 1 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 208 ACS SASSI PREP User Manual 209 5 4 20 Generate Translational Masses by Translation MTGEN lt itim gt lt ninc gt lt n1 gt lt n2 gt lt inc gt lt mx gt lt my gt lt mz gt generates lt itim gt default 1 sets of translational masses in the nodes specified by the numbers obtained by incrementing with lt ninc gt default value lt n2 gt lt n1 gt 1 the node numbers belonging to the node pattern defined by lt n1 gt to lt n2 gt with step lt inc gt default 1 while at the same time incrementing the pattern masses with lt mx gt lt my gt and lt mz gt default 0 This instruction works similarily to the NGEN instruction from the Node Instruction group see section 5 2 12 with the difference that translational masses and not coordinates are generated 5 4 21 List Translational and Rotational Masses MTL
394. the data from the combined time history will be saved to the new file If the cancel button is pressed the analysis will not be run and the file will not be created 3 5 17 Soil Layer Plot Window Settings Soil Layer Window Settings Start Layer ill End Layer 5 Cancel M Show Thickness Help M Show Specific Weight M Show P Wave Velocity M Show S Wave Velocity IV Show P wave Damping Ratio M Show S Wave Damping Ratio The following options allow you to customize the active Soil Layer Plot window Start Layer Type the number of the first layer to be displayed End Layer Type the number of the last layer to be displayed maximum 10 layers may be displayed at once If the end layer is the last layer the properties of the halfspace rock layer will also be displayed Show Thickness 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 123 ACS SASSI PREP User Manual 124 Select this option if you want to display the thickness of the displayed layers Show Specific Weight Select this option if you want to display the specific weight of the displayed layers Show P Wave Velocity Select this option if you want to display the P wave velocity of the displayed layers Show S Wave Velocity Select this option to display the S wave velocity of the layers Show P Wave Damping Ratio Select this option to display the P wave damping ratio of the layers Show S Wave Damping Ratio Select this opti
395. this command to arrange multiple opened windows in an overlapped fashion 3 6 4 Arrange Icons of Closed Windows Select Arrange Icons from the Window submenu 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 137 ACS SASSI PREP User Manual 138 Use this command to arrange the icons for minimized windows at the bottom of the main window If there is an open document window at the bottom of the main window then some or all of the icons may not be visible because they will be underneath this document window 3 6 5 Close the Active Window Select Close from the Window submenu Use this command to close the active window 3 6 6 Close All Opened Windows Select Close All from the Window submenu Use this command to close all opened windows 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 138 ACS SASSI PREP User Manual 139 3 7 VIEW SUBMENU ACS SASSI Prep Model File Batch Plot Options Window BYGDA Help wld olols 4 MEE i FMOD E sa fli Tool Bars v Status Bar v Instruction Line 3 Output No active database v 1 Output Open close check errors window 3 7 1 Show Hide the Check Errors Window Select Check Errors from the View submenu Use this command to display or hide Check Errors window which displays the error and warning messages from the last AFWRITE or CHECK instruction see sections 5 1 4 and 5 1 8 A check mar
396. this command to open or create a model database 58 The Open SASSI Database window will appear on the screen The following options allow you to specify which database to open create Save in ja Sassi fa c BEI File name ftest1 Save as type sassi databases sdb Cancel File Name Type or select the database you want to open This box lists files with the extension you select in the List Files of Type box 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 58 ACS SASSI MAIN User Manual 59 List Files of Type Select the type of file you want to open ACS SASSI databases sdb All files Drives Select the drive for the database that you want to open Directories Select the directory for the database that you want to open Network File Access Choose this button to connect to a network location assigning it a new drive letter The model database is a binary file containing information about models Do not edit the files generated by ACS SASSI or open files generated with other applications because they will not be accepted The database remains active until you select another one and is displayed in the Status Bar see section 6 7 2 page 81 6 1 2 Open a Model Select Open Model from the Model submenu Shortcuts Tool bar Keys Ctrl M Use this command to open a model previously created from the ACS SASSI PREP pre processor see Run PREP command se
397. three component input acceleration time histories compatible with a given design ground response spectrum with or without time varying correlation between the components The user has also the option to generate acceleration histories using the complex Fourier phasing of 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 5 ACS SASSI MAIN User Manual 6 selected acceleration records called seed records in the ASCE 04 2014 Standard The software provides baseline correction and computes PSD and peak ground accelerations velocities and displacements to be used by the analyst to check the US NRC SRP 3 7 1 requirements for the simulated accelerations ii Evaluation of the seismic motion incoherency and wave passage effects ACS SASSI Version 3 0 includes state of the art modeling including both isotropic radial and anisotropic directional incoherency models Both stochastic and deterministic incoherent SSI approaches could be employed for simple stick models with rigid basemats These incoherent SSI approaches were validated by EPRI Short et Al 2006 2007 for stick models with rigid basemats and accepted by US NRC ISG 01 May 2008 for application to the new NPP seismic analysis ACS SASSI includes six incoherent SSI approaches namely two simplified deterministic approaches that are the AS and SRSS approaches benchmarked by EPRI Short et al 2007 three other alternate deterministic approaches and a rigo
398. tic approaches are not capable of capturing the phasing of the free field motions at interaction nodes For large size elastic foundation FE models the accuracy of the SRSS approaches could be significantly degraded if only a reduced number of incoherent modes is used Ghiocel 2013b It should be noted that the SRSS approach requires a separate SSI analysis for each incoherent mode that could make it highly impractical for application to complex SSI models with elastic basemats under high frequency inputs It should be also noted that for the stochastic simulation approach and the deterministic approach based on linear superposition the default number of extracted coherency matrix eigenvectors or incoherent spatial modes is all modes The use of all modes has only a negligible impact on the incoherent SSI analysis runtime Consideration of all incoherent spatial modes improves the incoherent SSI accuracy and produces an exact recovery of the free field coherency matrix at the interaction nodes this can be checked for each calculation frequency The SRSS approach is more difficult to apply since has no convergence criteria for the required number of incoherent spatial modes to be considered For more details on the incoherent SSI approaches please see the ACS SASSI MAIN manual and its references Tseng and Lilhanand 1997 Short et al 2007 Ghiocel 2007a Ghiocel et al 2009a 2009b 2010b and 2010c Ghiocel 2013b WARNING Before using
399. tic maximum values or animated time varying values at selected time frames automatic frame selection is included Maximum element center stresses values are also available in a convenient text file format xii Computation and contour plotting of seismic soil pressure on foundation walls using near field SOLID elements The nodal pressure is computed based on averaging of adjacent element center pressures Both maximum and time varying values of nodal seismic pressures are computed and available for plotting The analyst can also automatically combine the seismic soil pressures with the static soil bearing pressures and then plot the resultant soil pressure of foundation walls and mat Contour seismic soil pressure plotting can be either static contour plots of maximum values or animated contour plots of time varying values at selected time frames an automatic frame selection capability is included xiii Post SSI run calculations for superposition of the co directional SSI effects in terms of acceleration displacement of stress time histories and in structure response spectra For time histories both the algebraic summation and subtraction is available For in structure response spectra i the weighted linear combination and ii the square root of sum of square SRSS combination are implemented The analyst can also compute the average in structure response spectra ISRS from 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technolo
400. tio curve All ratio values are positive decimal numbers less than or equal to 1 and the addition of the ratio values of all the participating wave types at each frequency must be 1 Incident Angle Type the incident angle of the selected wave type The incident angle is defined as the angle between the direction of propagation and the z axis For vertically propagating waves this angle is zero Frequency 1 Type the first frequency to define ratio curve Frequency 2 Type the second frequency to define ratio curve Control Point Layer Type the layer number of the control point The control point is defined as the point where the control motion is specified It will be located at the top of the specified layer number e g 1 for the control point at the surface Direction Select the direction of the control motion in the x y z coordinate system The transformation of the coordinates from the x y z system to the final xyz coordinate system of soil structure will be done by the ACS SASSI ANALYS module 3 5 7 Set the Analysis Options for the ACS SASSI POINT Module The POINT module computes information required to form the frequency dependent flexibility matrix The ACS SASSI POINT module recovers the soil layer properties and the eigen solutions for the Rayleigh and Love wave cases from FILE2 Then for each frequency specified in the ACS SASSI SITE module and for given radius of the central zone the program solves for t
401. tion External Accel Select this option if you want to use an external acceleration input file for computing its response spectra PSD psd file and Fourier spectra fft file No simulation of acceleration history is performed EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Spectrum Files mal Spectrum Number fi Edit Spectrum Input File EMO_PROBLEMS DEMO1 RG160H RS gt gt Spectrum Output File C ACSv230 DEMO_PROBLEMS DEMC gt gt Acceleration Output File CAACSv230 DEMO_PROBLEMS DEMC gt gt Optional Spectrum Files Target PSD J7 Accel Record 7 Extemal Accel Use Taget PSD Acceleration Input File _ gt gt _ Ps0 File gt r Correlation Number of Frequencies 24 mas No Time Cor Initial Random SEED Damping Value 0 05 hoff Time Step 0 005 oS Total Duration j5 a Number OF SEEDs fi Ek T a I Corelated Spectra Title Title for spectra 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 64 ACS SASSI PREP User Manual 65 Acceleration Input File Type or select the recorded acceleration input file name Number of Frequencies Type the number of frequency steps for defining the given spectrum Initial Random SEED Number Type the initial random SEED number that controls the random phasing Damping Value Type the viscous damping ratio value for the given input spectrum Time Step Type the time step of
402. tion Incoherency Effects on Dynamic Response 7th ASCE EMD STD Joint Speciality Conference on Probabilistic Mechanics and Structural Reliability Worcester MA August Ghiocel D M et al 1996d Probabilistic Seismic Analysis Including Soil Structure Interaction 7th ASCE EMD STD Joint Speciality Conference on Probabilistic Mechanics and Structural Reliability Worcester MA August Ghiocel D M et al 1996e Effects of Random Field Modeling of Seismic Ground Motion on Structural Dynamic Response 37th AIAA ASME ASCE Conference on Structures Structural Dynamics and Materials Section on Probabilistic Applications Salt Lake City April 1996 Ghiocel D M et al 1995 Seismic Soil Structure Interaction Effects on Probabilistic Floor Response Spectra Proceedings of the 1995 Annual ASME PVP Conference Honolulu July Ghiocel D M et al 1991 Evaluation of Seismic Soil Structure Interaction by Different Approaches 2 International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics Vol 3 St Louis Missouri Rolla March Ghiocel D M et al 1990a Seismic Soil Structure Interaction Effects for Shearwall Buildings on Soft Clays 10 European Conference on Earthquake Engineering ECEE Moscow September Ghiocel D M et al 1990b Evaluation of SSI and SSSI Effects on Seismic Response of Nuclear Heavy Buildings by Different Approaches the 10th European Conference o
403. tion the user is supposed to input the effect combination coefficients No additional user s input is required for SASS When the buttons are pressed a file box will appear which will allow the user to save the data to a new spectrum file When the OK button is pressed the new file is created and the data from the analysis is saved to the file If the cancel button is pressed the analysis will not be performed and the data will not be created Each button will work on the selected curves that are selected If more than the expected number of curves is selected the first selected curves will be used in the analysis and a warning box will be displayed The warning box will tell the user telling him her what number of curves was expected and that the first curves selected were used in the analysis that was saved to the file If a user selects less than the number of curves allowed the function will continue as if the undefined curves were simply 0 at all frequencies The result curve will be saved in a file named by the user before the analysis is performed this file can then be graphed as any other spectrum file 3 5 19 Soil Property Plot Window Settings The following options allow customization of the active Soil Property Plot window G D Axis 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 126 ACS SASSI PREP User Manual 127 Set the Logarithmic check box set the shear modulus and damping ratio axis t
404. to lt e2 gt default lt e1 gt with step lt inc gt default 1 If an element belongs to a SOLID PLANE or LOVEWAVE group and by default or by explicit setting is of type excavated soil the index refers to the soil layer table otherwise the index refers to the material table 5 3 31 Modify the Group Type MTYPE lt gr gt lt type gt modifies the type of group lt gr gt If lt gr gt is not specified it is set to the active group The parameter lt type gt can be typed as a number or a string See also GROUPinstr_group instruction Note If the group is not empty all element data from the selected group will be cleared 5 3 32 Delete Matrix Properties MXDEL lt p1 gt lt p2 gt lt step gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 199 ACS SASSI PREP User Manual 200 deletes the matrix properties with index from lt m1 gt to lt m2 gt default value lt m1 gt with step lt inc gt default 1 5 3 33 Set Terms for Matrix Property Imaginary Part of Stiffness Matrix MXI lt p gt lt row gt lt t1 gt lt t2 gt lt t12 gt sets the terms belonging the imaginary part of the stiffness matrix of matrix property lt p gt row lt row gt to lt tl gt lt t12 gt If the matrix property lt p gt does not exist it will be created by this command Since the matrix is upper diagonal enter only the required number of terms from the diagonal to the right
405. to file section 5 1 20 LFREQ Lists frequency sets section 5 1 21 ME Defines input motion data for ACS section 5 1 22 SASSI HOUSE module MOPT Changes the model options section 5 1 23 MOTION Defines analysis options for ACS section 5 1 24 SASSI MOTION module NEW Creates a new model section 5 1 25 NOUT Adds nodal output request for ACS section 5 1 26 SASSI MOTION module OUT Switches output to file or screen section 5 1 27 POINT Defines analysis options for ACS section 5 1 28 SASSI POINT module Q Quits the ACS SASSI PREP pre section 5 1 29 processor RESUME _ Re loads the active model section 5 1 30 RP Repeats the last instruction section 5 1 31 RSIN Sets the response spectrum input file section 5 1 32 for ACS SASSI EQUAKE module RSOUT Sets the response spectrum output file section 5 1 33 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 160 ACS SASSI PREP User Manual 161 Instruction Action SACC SAVE SFOU SITE SOIL SPRO SRS SSAF SSTR STATUS STRESS SYMM THFILE THTIT TIT TOPL WAVE WPASS WRITE RELD RELF RDND 5 1 1 Set the Acceleration Time History Input File for ACS SASSI EQUAKE Module for ACS SASSI EQUAKE module Sets the acceleration output options for ACS SASSI SOIL module Saves active model Sets the Fourier spectrum output options for ACS SASSI SOIL module Defines analysis options for ACS SASSI SITE module Defines analysis optio
406. to open a TFU TFI Plot window and then select the TFU and TFI file that you would like to plot on figure You may change the drawing options using the following commands Options Window Settings see section 3 5 18 Options Colors see section 3 5 26 or Options Font see section 3 5 29 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 44 ACS SASSI PREP User Manual 45 ACS SASSI Prep Spectrum File 00229TR XTE W Model File Batch Plot Options Window View Help Sla le lols xla lels Xz X 5 j wane 6 aleloa 7 4 mlalvie alaala elel fm 1 e Me Hala ele 00229TR_X TFU 00229TR_X TFI 3 4 5 Open Soil Layer Plot Window Select Layers from the Plot submenu Shortcuts Tool bar Keys F7 Use this command to open a new window containing the soil layers set from the analysis options for module SITE see Analysis Options SITE dialog box section 3 5 6 You may change the drawing options using the following commands Options Window Settings see section 3 5 17 Options Colors see section 3 5 25 or Options Font see section 3 5 29 Use the View menu to switch among the multiple open windows see View 1 2 command section 3 7 6 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 45 ACS SASSI PREP User Manual 46 ACS SASSI Prep SASSI Soil Layer View lt 1 gt
407. to variations of the excavation mesh size than the FI methods For embedded SSI models especially in soft soils we always recommend preliminary sensitivity studies using the three SSI substructuring methods FI FSIN FI FSIN and FV using different excavation mesh sizes before performing the SSI production runs For these preliminary mesh sensitivity runs the structure could be modeled simpler since the focus on these 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 15 ACS SASSI MAIN User Manual 16 runs is to investigate the excavation volume behavior that affects the wave scattering around the foundation and not to to computed detailed structural results Both horizontal and vertical should be considered 10 The interaction nodes shall always include all the foundation soil interface nodes Skipping foundation soil interface nodes with the intention to reduce the number of the interaction nodes could affect significantly the SSI solution accuracy 11 An important modeling aspect is that the foundation mesh and also the excavation volume mesh should be as uniform as possible Non uniform meshes implies non uniform local dynamic soil stiffnesses at the interaction nodes that affects the accuracy of SSI analysis Regular uniform foundation meshes are recommended Non uniform meshes make also difficult the selection of the radius of the axisymmetric soil model used in POINT to compute soil layer flexibilities It sh
408. tra The MOTION module applies optionally the baseline correction to all the nodal output acceleration time histories used for computing response spectra We recommend the use RELDISP module instead of using the baseline correction for computing relative displacements RELDISP uses an complex frequency analytical approach for computing relative displacements that is more accurate than baseline correction procedures EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Type of Analysis Baseline Correction Seamic No Comection Data Check Foundation Vibrati With Corecti S ton Total Number of Freq Steps 100 Output Control i T Output Only Transfer Functions Incoherent SRSS Input ra i oat V Save Complex Transfer Function Interpolation Option 0 ana Save FILE 13 E Phase Adjustment jo Acceleration Time History Data Total Duration to be Plotted 20 Smoothing Parameter jo Nr of Fourier Components 4096 Nodal Output Data Time Step of Control Motion 0 005 EE x CY CZ CXC yy C Zz Multiplication Factor eid Printed Plot of Transfer Function Max Value for Time History 0 1 I Save Time History of Requested Response Ber Roconi fo I Plot Time History of Requested Response Plot Acceleration and Velocity R S Last Record fo I Save Acceleration and Velocity R S Tile RG160x Print Maximum Requested Response Ic ACSv230 DEMO_PROBLEMS Delete z File Contains Pairs Time
409. trusion in the physics of the SSI response with the intention of providing more conservative incoherent ISRS results by neglecting the counteracting effects that are produced by opposite phasing between neighboring frequencies Thus more realistic unbiased responses can be 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 103 ACS SASSI PREP User Manual 104 obtained if the phase adjustment is neglected However ONLY the phase adjustment option was validated by the 2007 EPRI studies for the application to the incoherent SSI analysis of the new nuclear facilities in US WARNING The use of the phase adjustment similar to the use of the SRSS approaches affects the cross correlation between the SSI response motions at different locations Thus if phase adjustment option or the SRSS methods are used then the response motions computed at different locations should be not used for Multiple Time History Analysis of secondary systems NOTE If multiple sets of three directional input acceleration time histories are used instead of a single set of three directional time histories then the application of the phase adjustment will be less obvious and justified from the engineering point off view An unbiased mean incoherent SSI solution could be obtained by using multiple input sets without applying the phase adjustment and average their SSI responses However at this time such an multiple input set approach wi
410. ts for incoherent analysis since it does not create any spurious peaks or valleys Thus the new ACS SASSI Version 3 0 includes seven options for the interpolation schemes 0 to 6 that are implemented available for computing accurate nodal acceleration complex transfer function ATF solutions These interpolation schemes were implemented for the structural motions Different interpolation techniques could perform differently on a case by case basis especially for highly complex FE models with coupled responses The various interpolation options that are available in the code provide the structural analyst a set of powerful tools for identifying and avoiding the occurrences of spurious spectral peaks in the computed transfer functions of structural motions and stresses The first six options were implemented in the original SASSI 1982 scheme that uses a non overlapping moving window the university SASSI2000 scheme that uses a weighted average moving window and four new interpolation schemes including two non overlapping window schemes with different shifts and two average overlapping moving window schemes with different numbers of sliding windows To check the interpolation accuracy convenient comparative plots of the computed TFs versus the interpolated TFs can be easily obtained using the PREP module graphics vii The new Fast Flexible Volume FFV method provides accurate and numerically efficient SSI analysis solutions for deeply embedded struc
411. ture The element sizes for the excavated soil elements are controlled by the distance between the interaction nodes The excavated volume nodes need to be defined at the interface of the free field soil layers with same Z coordinate Interaction nodes also need to be defined at the interface of the free field soil layers with same Z coordinate but not necessarily for each free field soil layer Internal nodes in the embedment that are not a part of the excavated volume but a part of an internal structure vibrating independently from soil need to be defined separately from the SSI interaction nodes The SSI results are sensitive to excavated soil mesh size The vertical mesh size is selected based the above criterion for accurate transmission of high frequency vertically propagating wave components However for the horizontal mesh size the use of the same criterion as for the vertical size could be too restrictive for some applications and by this potentially creates an unnecessary analysis computational burden Please see in this section item 19 for additional details 15 SSI Substructuring Methods In ACS SASSI there are three main SSI flexible volume substructuring methods available for the SSI analysis calculations FV Fl and FFV as described in Section 2 0 Key details on the application of these three methods and guidance are provided in Section 1 5 1 Section 2 1 and in this section at the item 19 shown below WARNING The new ASCE 04
412. tures DES such as small modular reactors SMRs The FFV method in addition to the interaction nodes defined at the outer surface of excavation volume includes interaction nodes defined by internal node layers within excavation volume The user can automatically generate the interaction nodes for the FFV method The FFV method speeds up the SSI analysis of deeply embedded structures by tens of times faster than the traditional reference FM method vii Automatic selection of additional SSI calculation frequencies that are required to improve the accuracy of the interpolated TF that is applicable to both the node acceleration or displacement TFs and the element stress TFs This feature is an important practical capability especially for larger size FE model applications because it saves a lot of labor effort and also ensures a better quality of 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 11 ACS SASSI PREP User Manual 12 SSI analysis viii Visualization of complex TF variation patterns within the entire structural model for selected SSI calculation frequencies The complex TF patterns are visualized on the structure using colored vector plot animations including all three directional components red for X green for Y and blue for Z The TF amplitude is given by vector length and the TF phase is given by vector orientation This capability is extremely useful for checking the correctness of the FE mode
413. uadrangle will become a triangle 5 3 12 Set Type for SOLID PLANE or LOVEWAVE Elements ETYPE lt e1 gt lt e2 gt lt inc gt lt type gt where lt type gt 0 default 1 structural 2 soil sets the element type to lt type gt for the elements between lt e1 gt and lt e2 gt with step lt inc gt default 1 from the SOLID PLANE or LOVEWAVE active group By default if an element has all nodes at below the ground elevation it is assumed to be a excavated soil else structural element 5 3 13 Copy a Group GCOPY lt sg gt lt dg gt lt ninc gt will copy all information from source group lt sg gt to the destination group lt dg gt default active group and incrementing all element nodes with lt ninc gt default 0 The groups must have the same type 5 3 14 Delete Groups GDEL lt g1 gt lt g2 gt lt inc gt deletes all groups between lt g1 gt and lt g2 gt with step lt inc gt The default values are lt g1 gt for lt g2 gt and 1 for lt inc gt 5 3 15 List Groups GLIST lt g1 gt lt g2 gt lt inc gt 5 INSTRUCTION SET Copyright 2014 by Ghiocel Predictive Technologies Inc 194 ACS SASSI PREP User Manual 195 lists all groups between lt g1i gt and lt g2 gt with step lt inc gt If no parameter is specified all created groups will be listed 5 3 16 Create or Activate a Group GROUP lt ng gt lt type gt activates or creates the element group num
414. ule for the active model see Model Open Model command section 6 1 2 page 59 The postfixes and extensions for the input and output files are set using the Options Files command see section 6 5 2 page 78 All files generated by ACS SASSI HOUSE will be placed in the directory of the active model If the user wishes to use the formatted input files from models designed for earlier SASSI versions without using the pre processor do not open a model and ACS SASSI HOUSE will prompt for the input and output files In this case all files generated by ACS SASSI HOUSE will be placed in the directory of the ACS SASSI HOUSE module While ACS SASSI HOUSE is running ACS SASSI MAIN sets the corresponding check box from the 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 70 ACS SASSI MAIN User Manual 71 Status Panel see section 6 7 3 page 82 and displays the current status of module HOUSE in the corresponding progress bar All modules may be run automatically using the Run All Start command see section 6 4 2 page 76 Note Before performing this command make sure that the path of ACS SASSI HOUSE is correct see Options Directories command section 6 5 1 page 77 6 3 9 Run the ACS SASSI PINT Module not included in this version Select PINT from the Run submenu Shortcuts Tool bar Keys F9 Use this command to run the ACS SASSI PINT module for the active model see Model Open Model comm
415. un time and the required disk space can be reduced by tens of times For deeply embedded SSI models such as SMRs the FFV method is an extremely useful method WARNING Note the new ASCE 04 2014 standard and the USNRC SRP 3 7 2 require a preliminary validation study if any other method than FV is used such as SM MSM or FFV The validation against FV has to be done before SM MSM or FFV can be used for the SSI production runs As recommended in the ASCE 04 2014 standard the validation analysis can be done for simple excavated soil models including no structure or foundation part The validation study shall compare the computed acceleration transfer functions ATF at the common nodes between the structure and excavated soil Rather than considering the solely excavated soil model the swimming pool model the use of a simplified massless foundation model to determine the kinematic SSI effects 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 14 ACS SASSI MAIN User Manual 15 using SM MSM or FFV against FV is suggested For deeply embedded SSI models such as SMRs in deep soft soil deposits the excavation soil model could become numerically poorly conditioned and therefore should be avoided The most complete validation study is be to consider the full SSI model and check ATF at critical locations within the nuclear building Ghiocel et al 2013a The SUBMODELER module includes two new c
416. urves 11 Number of soil layers 200 SITE Module Number of soil layers 200 Number of half space layers 20 Number of analysis frequencies 500 POINT Module Number of soil layers 200 Number of half space layers 20 Number of analysis frequencies 500 Number of embedment layers 50 FORCE Module Number of analysis frequencies 500 HOUSE Module Number of nodes 99 999 Number of interaction nodes 99 999 Number of materials or cross section geometries 9 999 Number of analysis frequencies 500 Number of embedment layers 50 Number of multiple support foundation zones 200 for Standard Solver 2 000 for Fast Solver ANALYS Module Number of analysis frequencies 500 MOTION Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 Number of damping values for response spectra calculations 5 RELDISP Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 STRESS Module Number of analysis frequencies 1500 Number of time steps or Fourier frequencies 32 768 Number of elements per group 5 000 for Standard Solver 10 000 for Fast Solver Number of element groups limitation only for post processing 500 for Standard Solver 5 000 for Fast Solver 1 3 MODULAR STRUCTURE CONFIGURATION The main configuration of the ACS SASSI Version 3 0 code includes a number of 11 distinct SSI
417. ut File ereinen eee eene eanne ERE ae nen EEEn ET etic 26 3 1 5 Open Specified MOel ee eeeeeecceeccceeeeeeeeeeeeeaeeeeeeeeeeeeeeaaaaaaeeeeeeeeeeeseeceeeeeeees 27 ScD EXIT AGS Slice PREP aia e AEEA EE A EA 27 327 HAPE SUBMENU a a a a aE a A AE A a AE A A e E aa tkbat 27 3 2 1 Open ar File for Editing mosni a a ana a Eana EEEIEE 28 3 2 2 Export Window Image to Bitmap cccceeeeeeeeeeeeeeeeeeeeneeeeeeeeeeeeeeeeeceeeeeeeeeeenes 28 3 2 3 Export Time History Graph to Table ccccceeceeceseceeeeeeeeeeeeeeeeenneeeeeeeeeeeeeeanaaeees 29 324 Select Printe cite aa aca wares en ean veel es ee wae ese ag ee ee a 29 2 PRIME ACIIVE WV INDO Wes 25 ieee E E E 29 33r BATCMTSVBME NU nee mr cre Rg cc ere Eg oer eT Cea ees 30 3 3 1 SPO CUMIN Ss wc xciaeacene tees etaneeedaienaentateravsieeergesinlonacedavexaveanteuanetacsvareaniaunestatetateveeeacest 31 332 IME HISTO iiine er a e a a E a E AE TEA uate 32 3 3 3 APIGQUCNOY sn iieiea oa at aera ayer eee aes eee eee ee aaa 33 Oa 4s Frame SClOClON wate alae a ale he ale hea ala i Cate at 33 3 3 5 Frame GOMDINANONM 224 eee cetaie hes ee ene hee ind Lee ki tie kt aah es 34 dO AE WPI Es Generati Mugs sce oee See oust Ses cess See ce Ses eat Sem deat ee tas Sem etest See eae ras bese ete ese 35 34 PLOT SUBMEN Uaa a aa 39 3 4 1 Open a New Model Elements Plot Window 2 eeeeeeeeeeeeeeeeeeeeeeeeeeeeaneaeees 40 3 4 2 Open a New Model Node Plot eceececseccceceeeeeeeeeeee
418. wer spectral density PSD psd file and the positive frequencies portion of the complex Fourier Transform FFT fft file of the simulated acceleration histories or external acceleration histories input by the user The PSD is computed using a plus minus 20 frequency averaging intervals in compliance with the ASCE 04 standard and US NRC requirements The strong motion duration is defined by the time interval between 5 and 75 Arias intensities The psd file contains a two column data set The 1st column is frequency and the 2nd column is the computed PSD amplitude The units depend on the user selection for the gravity acceleration units If gravity acceleration unit is ft s then the computed PSD unit is in inch sec If the gravity acceleration units is m s then the computed PSD unit is cm sec The fft file contains a three column data set The 1st column is frequency the 2nd column is Fourier transform real part and the 3rd column is the Fourier transform imaginary part It should be noted that are only positive frequencies are included The EQUAKE output file includes the input data information the generated acceleration time history input parameters the statistical pair correlations between components for the entire motion duration stationary correlation and for a 2 second moving window nonstationary correlation Note The nonstationary correlation values for recorded motion components NS EW Vertical could be used t
419. where all of the Data files for the animation Reside The rest of the File is a list of the frame file with one file name per line Example Input 161 A XDIR TFU TFU_000 05_00001 TFU_000 24 00002 TFU_000 49_ 00003 TFU_000 73_00004 TFU_000 98_00005 TFU_001 22_ 00006 This input file will animate the six frames listed Frame Data Format The Frame Data format similar to the Data format for the Bubble plot see section 1 4 9 The headed consists of number of nodes in the file and a default scale factor The rest of the file is a node list with node number and X Y Z components however the components are complex numbers for the transfer function data 3 4 11 Open Contour Plot Window Static Animated Select Contour Plot from the Plot submenu Shortcuts none 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 54 ACS SASSI PREP User Manual 55 Use this command to open an new Contour Plot window When this command is first entered it will bring up the Open Plot Data window where the user can find the data file to be displayed as well as give a title for the plot area The animated contour option uses the format described in the CONTANI section while the Static option allow the user to plot any frame as described by the frame data format Open Plot Data Data File Title Cancel Data File User input for a file path for a Contour file lt lt Button user can click to open a file open p
420. xes Copies Specify the number of copies you want to print for the above page range Collate Copies Prints copies in page number order instead of separated multiple copies of each page 3 3 BATCH SUBMENU aasan Model File Plot Options Window View Help alaj fm Szk Time History Frequency Frame Selection Frame Combination Afwrite Generation 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 30 ACS SASSI PREP User Manual 31 3 3 1 Spectrum The Batch Spectrum command will execute a user defined batch file which will load response spectra or TF files in to the program The data then can graphed or post processed as the user would with buttons described in Options Window Settings see section 3 5 18 Batch Spectrum File Format The Batch spectrum file format starts with a single integer number which is the number of operations to be preformed by the file After the number of operations is defined the program will attempt to read an operation blocks The operation block consist of a header line which list the number of curves to be read the operation to be preformed and the file name to save the data The next line of the block is the options for the selected operation which is described below After the options line the path of the files to be plotted are listed each on a separate line Line 1 Number of Calculations Image Captures to be Preformed Line s
421. xibility and Impedance Matrices of the Foundation The computation of the flexibility matrix follows the point load solution of a soil column The soil column is modeled by finite elements plane strain or axisymmetrical elements The impedance matrices C including real part K and imaginary part D of a rigid foundation are computed from the foundation compliance matrices f and g K ioD f ig 4 1 where w is the frequency of analysis and 1 The columns of the foundation compliance matrices can be obtained by applying a unit amplitude force or moment in the desired direction at a specified point on the foundation and computing the resulting real and imaginary parts of displacements or rotations of that point By inverting the compliance matrices using the above formula the corresponding impedance matrices are computed 18 Non Linear Hysteretic Soil Behavior Since a frequency domain solution is used the program is restricted to linear systems However approximate non linear analysis can be performed interactively or in batch mode using the Seed Idriss equivalent linear procedure In the application of the equivalent linear procedure to seismic SSI 4 APPLICATION GUIDELINES Copyright 2014 by Ghiocel Predictive Technologies Inc 48 ACS SASSI MAIN User Manual 49 problems it is useful to consider the non linear soil effects associated with two types of non linearity i Global nonlinearity includes the effect due
422. y For shell FEA structure models the use of the FIXROT or FIXSHLROT command included in the SUBMODELER module improve the numerical conditioning for thin SHELL models by avoiding the occurrences of numerical singularities due to the zero in plane rotational stiffness for the Kirchhoff plate elements For oblique SHELL elements the FIXROT and FIXSHLROT command automatically adds a small stiffness torsional spring for the in plane rotations The torsional spring stiffness default value is equal to 10 The user can modify the torsional spring stiffness value so that this torsional spring stiffness value is not larger than 10 of the SHELL element bending stiffness WARNING For larger size SSI models especially including oblique shell elements we recommend the use of the FIXROT or FIXSHLROT commands included in the SUBMODELER module Please see ACS SASSI ANSYS Integration Capability User Manual for details on the SUBMODELER module and the FIXROT and FIXSHLROT command The FIXSOLDROT and FIXSPRROT commands take care of fixing the unused free rotational DOFs for the SOLID and SPRING elements respectively The use of these commands save both disk storage and run time 3 For nodes that are common to the BEAM or SHELL elements and SOLID elements the nodal rotational displacements of the BEAM or SHELL elements are not transmitted to the SOLID elements This is because the SOLID elements have only three nodal translations and no rotation To trans
423. y lt p gt has a negative value e Correct the flexural inertia moment 2 from the specified property instruction MODR see section 5 3 28 Error 32 Flexural Inertia Moment 3 from Property lt p gt Is Illegal e The flexural inertia moment 3 from property lt p gt has a negative value e Correct the flexural inertia moment 3 from the specified property instruction MODR see section 5 3 28 Error 33 Spring Property lt p gt Is not Defined e One of the model s SPRING elements uses spring property lt p gt which is not defined e Check the elements for property indices or define spring property lt p gt instruction SC see section 5 3 41 Error 34 Spring Constant X from Spring Property lt p gt Is Illegal e The spring constant x from spring property lt p gt has a negative value e Correct spring constant x from the specified spring property instruction MODSC see section 5 3 29 Error 35 Spring Constant Y from Spring Property lt p gt Is Illegal e The spring constant y from spring property lt p gt has a negative value e Correct spring constant y from the specified spring property instruction MODSC see section 5 3 29 Error 36 Spring Constant Z from Spring Property lt p gt Is Illegal e The spring constant z from spring property lt p gt has a negative value e Correct spring constant z from the specified spring property instruction MODSC see section 5 3 29 Error 37 Spring Constant XX from Spring
424. y for Option A described in separate manual Runs a Batch file From the ACS SASSI GUI Sets the modules to be run automatically Starts running the selected modules Stops running the selected modules Sets the directories and program names of the ACS SASSI modules Sets the post fix and extensions for the input and output files for the ACS SASSI modules Changes the font of the active window Arranges windows in horizontal non overlapped tiles Arranges windows in vertical non overlapped tiles Arranges windows in an overlapped fashion Arranges icons of closed windows Closes the active window Closes all active windows Shows or hides the tool bar Shows or hides the status bar Shows or hides the status panel Goes to specified window Offers you an index to topics on which you can get help Displays the version number of this application 6 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 57 ACS SASSI MAIN User Manual File Bun Run All Options Window View Help Open Database Ctrl D Open Model Ctrl M 6 6 x2 Close Model I EQUAKE Module 1 D SASSI models sdb e2c2 2 D SASSI models sdb a137 3 D SASSI models sdb cje 4 D SASSI models sdb alb Exit I SOIL Module M LIQUEF Module I SITE Module ea D SASSI models sdb e2c2 Li 6 1 1 Open or Create Database Select Open Database from the Model submenu Shortcut Keys Ctrl D Use
425. ying the frequency number by the frequency step 3 MENU COMMANDS Copyright 2014 by Ghiocel Predictive Technologies Inc 70 ACS SASSI PREP User Manual 71 Analysis Options _ EQUAKE SOIL SITE POINT HOUSE FORCE ANALYS MOTION STRESS RELDISP AFWRITE Operation Mode Mode 2 Linear Soil MV Mode 1 R SV and P Waves Non linear Soli JV Mode 2 SH and L Waves Mode 1 R Wave SV Wave P Wave Gravity Accel ft s2 orm s2 35 gt No SV Wave Fiek Used for SSI Analysis m Frequency Step 0 SV Wave Field Time Step of Control Motion 0 005 Nr of Fourier Components 4096 Wave Ratio 1 1 Frequency Set Number ho o Wave Ratio 2 1 Number of Generated Layers 10 Incident Angle 0 Halfspace Layer 2 Frequency 1 1 Top Layers Frequency 2 4000 2 2 2 2 2 2 2 2 2 2 Control Point Layer 1 v Direction X CY CZ Number of Generated Layers Type the number generated layers to simulate the viscous elastic half space at the bottom of soil layering between 4 and 20 Leave this edit box blank or type 0 if you wish to suppress the half space simulation not recommended If the half space simulation is suppressed the soil profile will be assumed on rigid base otherwise a specified number of sublayers whose thickness varies with frequency are generated to simulate the half space Also ACS SASSI SITE will add viscous boundary to account for radiation damping in the halfspace through the
426. ypes eSOLID ePLANE The external force loads can be enodal forces enodal moments enodal translational masses enodal rotational masses 1 5 DATA INPUT ACS SASSI PREP offers several ways of entering input data e through the instruction line e through the instruction dialog boxes e through menu commands e through the import of input data files INP lt fname gt instruction see section 5 1 20 Using the ACS SASSI PREP instructions the data can be entered in free format with the as a delimiter between the instruction parameters and with as a delimiter between instructions if more instructions are specified on one line The general form of an instruction is an alphanumeric keyword which defines the instruction followed by parameters separated by Keyword p1 p2 pn Only the first four letters of the instruction name are necessary and instruction names are not case sensitive 1 INTRODUCTION Copyright 2014 by Ghiocel Predictive Technologies Inc 16 ACS SASSI PREP User Manual 17 Data may be entered in any order by alternating the instruction line dialog boxes menus and data files 1 6 DATA CHECKING Data checking can be done in several ways e during entering data by generating data lists e by the interactive plotting of the model or of the selected model parts soil layers time history files response spectra and shear modulus shear strain damping ratio
427. ysis since it does not create any spurious peaks or valleys Thus the new ACS SASSI Version 3 0 includes seven options for the interpolation schemes 0 to 6 that are implemented available for computing accurate nodal acceleration complex transfer function ATF solutions These interpolation schemes were implemented for the structural motions Different interpolation techniques could perform differently on a case by case basis especially for highly complex FE models with coupled responses The various interpolation options that are available in the code provide the structural analyst a set of powerful tools for identifying and avoiding the occurrences of spurious spectral peaks in the computed transfer functions of structural motions and stresses The first six options were implemented in the original SASSI 1982 scheme that uses a non overlapping moving window the university SASSI2000 scheme that uses a weighted average moving window and four new interpolation schemes including two non overlapping window schemes with different shifts and two average overlapping moving window schemes with different numbers of sliding windows To check the interpolation accuracy convenient comparative plots of the computed TFs versus the interpolated TFs can be easily obtained using the PREP module graphics vii The new Fast Flexible Volume FFV method provides accurate and numerically efficient SSI analysis solutions for deeply embedded structures DES such as sm

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