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Oasys GSA ‘Step Through’ Tutorial:‘General Use of GSA’ training exerciseThis tutorial guides you through the process of setting up a GSA model one step at a time.The tutorial is based on the main training exercise used in the ‘General Use of GSA’ trainingcourse, so a broad range of topics is covered.Topics covered in this ‘step through’ tutorial (followed by the section in which the topic iscovered): Grid lines (1, 3)Various sculpt operations (2 to 5)User axes (3)Mesh generation (4)Grid loading (5)Analysis stages (6)Raft analysis (7) P-delta analysis (8)Buckling analysis (8)Dynamic analysis (8)Footfall analysis (8)RC member design (9, 10)Steel member design (9, 10)RC slab design (10)Each step of this tutorial is numbered, has a short “Step” description and “Actions” thatdescribe the process. If you follow the actions then by the end of the tutorial you will havecreated the model shown below. This model has been saved at various stages in the process,with file names as indicated in the notes. These files are available in the \Samples\Training General folder beneath your GSA program folder, typically C:\Program Files\Oasys\GSA 8.2\Samples\Training General .finished modelANALYSIS LAYERScal e: 1:175.9zyxThe Finished ModelTrGen 10.gwbGSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20081 of 22
# StepNotesCreate orthogonal frame Set up grid lines. Generate an orthogonal frame based on the grid lines.1.1 Enable‘Tools Preferences Advanced Features’ ‘Enable All’advanced(Many advanced features will be used during this exercise.)features1.2 Open new‘File New’model1.3 Structure‘New Model Wizard : Structure type Type’ : ‘Space’type(Allows mixed 1D and 2D elements.)1.4 Grid lines‘New Model Wizard : Structure type Grid Lines’ to open ‘Grid LineDefinition’ dialog; assign grid lines: 1 to 4, A to C: Edit in line 1:o 1Line 001290 Add 3, copying line 1, incrementing in X by 5:o 2Line 501290o 3Line 1001290o 4Line 1501290 Edit line 4 X coordinate:o 4Line 1601290 Edit in line A:o ALine 00160 Add 2, copying line A, incrementing in Y by 6o BLine 06160o CLine 012160(Resulting in:o 1Line 001290o 2Line 501290o 3Line 1001290o 4Line 1601290o ALine 00160o BLine 06160o CLine 012160)1.5 Generate‘New Model Wizard : Structure type Generate data for the selectedbeamstructure type’ to open ‘Data Generation Wizard : Orthogonal frame’elementsdialogSpecify data for generation of orthogonal frame: ‘Generate elements’ ‘Generate bays from grid lines’(Grid planes will be generated automatically.) 3 storeys at 3.5m Assign concrete sections to columns and x and y beams ‘Include supports’ ‘Include self weight’1.6 View the‘Graphic View’generated Label () on nodes: restraintsdata Label () on elements: section shapes Draw grid1.7 Save view‘View Save Graphic View’ Saved view name: “startup”GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20082 of 22
(This view will be displayed in the initial Graphic View whenthe model is opened.)startupScale: 1:100.5EncEncEncC EncEncEncEncB Encz2EncA1Ency4Enc3EncxTrGen 01.gwbMake top floor a steel frame Modify the property references for the top floor elements. Specify new section properties.2.1 Modify top‘Graphic View’floor Label () on elements: property referencesproperties‘Graphic View Select elements’ cursor mode Select top level of columns(Drag from right to left to select elements even partly in dragrectangle.) Right-click on the Graphic View background; ‘ModifySelected Elements’ Modify columns to property 11 Select longitudinal beams(Shft select appends to selection.) Modify longitudinal beams to property 12(The ‘Command’ toolbar controloffers the last used sculpt command.)Select transverse beams(Ctrl select inverts selection.) Modify transverse beams to property 13‘Graphic View’, any cursor mode(May as well be ‘Rotate’ cursor mode:) Right-click on any top floor column; ‘Edit Edit Property’ Specify steel column Do similar for longitudinal and transverse beams‘Graphic View’ 2.2 Specify steelsections fortop floor2.3 View themodifieddata ‘Graphic Display’ toolbar; ‘Shrink’ ‘Graphic Display’ toolbar; ‘Section display’GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20083 of 22
startupScale: 1:94.90Labels:pb12pb12pb12pb13pb13pb13Prop. pb1pb1pb1pb1pb1pb1Enc2EncA1EncyEncEncB EnczEncEncEncC Encpb14Enc3EncxTrGen 02.gwbCreate skew wing grid lines Create a user axis set at the axis of rotation. Add the skew grid lines, making use of the new user axis set in the ‘Grid LineDefinition’ dialog.3.1 Reset‘Graphic View’display ‘Graphic Display’ toolbar; ‘Reset display adornments’(Resets the view to default view settings, as last specified by‘View Save Default View Settings’)3.2 Create axis(We need an axis about which we can rotate grid lines.)set at node‘Graphic View’12 Label () on nodes: node numbers3.3 Add skewgrid lines) axes: all user axes Label (‘Graphic View Select nodes’ cursor mode Select nodes 9, 11, 12(Either click on nodes or right-click on the Graphic Viewbackground; ‘Select List’; “9 11 12”; OK.)‘Sculpt Create User Axes’ Toggle the ‘Axes definition’ spin control till an axis set withorigin at node 12 and vertical z (blue) axis is displayed. Create‘Data Grid Lines’ to open ‘Grid Line Definition’ dialog; assign gridlines: 5 to 8, A1 to C1: Add 1, copying line 4, incrementing in X by zero: line 5 Add 3, copying line 5, incrementing in X by 5: lines 6,7,8 Rotate lines 5 to 8 about “axis 1” z by 30 deg. Edit in line A.1:o A.1Line 160150 Add 2, copying line A.1, incrementing in Y by 6, to createlines B.1, C.1 Rotate A.1, B.1, C.1 about “axis 1” z by 30 deg.GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20084 of 22
startupScal e: 1:148.3zxC.1CyAxi s 187B.1B6A.15A1243zyxTrGen 03.gwbCreate slab region Create area entities, made up of line entities, that define the outline of the slab and ahole in the slab. Create nodes at column positions. Generate the mesh.4.1 Set currentEither: ‘Data Define Current Grid’ to open ‘Current Grid Definition’grid to “1stdialogfloor” Specify ‘Grid plane’ as “1st floor”Or: ‘Graphic View’ (any cursor mode) Right-click on any node at 1st floor level; ‘Set Current Grid toThis’(The grid lines are drawn on the current grid. Coordinates are reportedwith respect to current grid axes. Sculpt tools operate on the currentgrid surface.)4.2 Form‘Graphic View’ (any cursor mode)volume of ‘Orientation’ toolbar; ‘Y elevation’ or Y “1st floor”‘Graphic View Volume’ cursor modeonly Drag left to right around 1st floor(For clarity while sculpting.)‘Graphic View’ (any cursor mode) ‘Orientation’ toolbar; ‘Plan’ or P 4.3 Set Graphic ‘Graphic View’ (any cursor mode)View to Right-click on the Graphic View background; ‘Switch layer’Design(Switches to ‘Design Layer’ - pink background.)Layer(Members, lines, areas and regions exist on the Design Layer)4.4 Add areaDisplay grid, and snap to grid pointsdefining slab ‘Sculpt’ toolbar; ‘Grid’boundary ‘Sculpt’ toolbar; ‘Snap to grid points‘‘Graphic View Add Lines Sculpt Tool’ cursor mode Create a line by clicking 1:A and 2:A(Default line properties are assigned.)(Nodes are created as required.) Right-click on new line; ‘Edit Line’ In ‘Line Definition’ dialog, set ‘Number of segments’ 4; OK(Mesh generation will aim to generate this many elementsalong line.)GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20085 of 22
Right-click on new line; ‘Set Line Defaults as This’(Now new lines will default to ‘Number of segments’ 4.) Create new lines around slab in original portion of structure,connecting grid line intersections(Breaking lines at grid line intersections will result in nodes atcolumn positions in the mesh.)(Ctrl click causes second node of one line to be used as thefirst node of the next. i.e. quicker.)( Esc quits the sculpt operation in progress.) On closing the loop, accept the offer to add an area(Area 1 is created, referencing the loop of lines just closed.) Create areas 2 and 3 defining the slab extents for the skewwing and interconnecting segment, respectivelySwitch off snap to grid points ‘Sculpt’ toolbar; ‘Snap to grid points‘‘Graphic View Add Nodes Sculpt Tool’ cursor mode Create a node ‘outside’ arc at approx. (20.0,-1.0,3.5) to createnode 58‘Graphic View’ (any cursor mode) Right-click on line that is to be an arc; ‘Edit Line’ In ‘Line Definition’ dialog, set ‘Arc defined by radius andpoint’, set third node to 58, and ‘Arc radius’ 12; OK(The arc will have a radius of 12m, lying in the plane of thethree nodes defined for the line and pulled towards the thirdnode.)Ensure ‘Snap to grid points’ is off ‘Sculpt’ toolbar; ‘Snap to grid points‘‘Graphic View Add Lines Sculpt Tool’ cursor mode Create four lines bounding hole, vertices at approx.:o (X 11.00m Y 1.500m Z 3.500m)o (X 14.50m Y 1.500m Z 3.500m)o (X 14.50m Y 4.000m Z 3.500m)o (X 11.00m Y 4.000m Z 3.500m) Either: on closing the loop, accept the offer to add an area Or: select lines and ‘Sculpt Geometric Entity Operations AddArea’‘Graphic View’ (any cursor mode) Right-click on area that is to be hole; ‘Edit Area’(The selection handle for an area is the symbol inset from thefirst corner of the area.) In ‘Area Definition’ dialog, set ‘Type’ to ‘Void’Switch on snap to grid points ‘Sculpt’ toolbar; ‘Snap to grid points‘‘Graphic View Add Nodes Sculpt Tool’ cursor mode Create a nodes at 6:B.1 and 6:B.2(These will be used to generate supporting columns and toidentify to the region the column positions.)(The current grid is still set to “1st floor” so the new nodes willbe created on that plane.)‘Graphic View Select nodes’ cursor mode Select the internal nodes‘Graphic View Select areas’ cursor mode Ctrl A to select all areas 4.5 Modify lineto arc4.6 Create holein slab4.7 Add missinginternalnodes4.8 Add regionGSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20086 of 22
‘Sculpt Geometric Entity Operations Add Region’(The region is a collection of nodes, lines and areas. A meshgeneration operation generates a mesh for a region.)(Generated 2D elements are assigned the property and group numberbased on those set for the respective area. Areas created in sculptdefault to having the property and group set to the area number.)‘Graphic View’ 4.9 Add 2DProperties4.10 Save “1stfloor columnpositions”node list4.11 Generatemesh4.12 Check andadjust themesh Label () on geometric entities: On areas: Property ref.s(The 2D properties can be entered before or after the mesh generation.)(For RC slab design we want the local axes to be aligned with thereinforcement direction, hence reference to user defined axes in the 2DElement Properties.)‘Data Geometry Axes’ (or from the Gateway) to open the ‘Axes’table Modify the type of axis 1 to ‘Cylindrical’Create axis set aligned with skew wing Select nodes 56, 63, 64 (See section 3.2 above)‘Data Properties 2D Element Properties’ to open the ‘2D ElementProperties’ table. Enter three properties:o Axis: ‘Global’, axis 2, axis 1(For the original wing, skew wing and interconnectingsegment, respectively.)o Type: ‘Flat Shell’(i.e. in-plane and bending action.)o Material: ‘Concrete long term’o Thickness: 0.3m(This list will be used after the mesh has been generated. It’s easier toselect the list before the mesh is generated.)‘Graphic View Select nodes’ cursor mode Select all nodes at 1st floor level column positions (All at 1st floor except those defining the void and third nodeof arc.) Right-click on the Graphic View background; ‘Save Selectionas List’Either: ‘Tools Region Mesh Generation Generate 2D Mesh forRegions’Or: right-click on the region; ‘Generate 2D Mesh for Region’(The selection handle for a region is the symbol at the centre of thelargest area included in the region.)(It is preferable to adjust the condition of the mesh by adjusting theparameters that define the mesh, rather than by adjusting the generatednodes and elements.) ‘Analysis Check Data’ reveals severe warnings on the shapeof some the generated elements. Setting the region ‘Steps’ setting to ‘Linear’ improves thecondition of the mesh. (But less heed is taken of the specifiednumber of segments on lines.)o Right-click on region; ‘Edit Region’ Adjusting the number of segments on lines in the vicinity ofthe void improves the mesh.oEither: ‘Graphic View’, label (GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 2008) on geometric7 of 22
oentities: On lines: Dots along linesOr: ‘Display Favourites’ toolbar; ‘Label node dots’- to get an idea.A quick fix is to set the step size consistently for all lines(instead of the number of elements along each line).o Right-click on a line; ‘Edit Line’o In ‘Line Definition’ dialog, set ‘Mesh by step size’ andset the ‘Step size’ 1; OKo Right-click on same line; ‘Set Line Defaults as This’o Select all lines (Ctrl A)o ‘Sculpt Apply Defaults to Selection’Further improvement can be achieved by adding ‘constructionlines’ to the region to help guide the mesh generator.(See the lines connecting from the slab boundary to the void inTrGen 04.gwb)Following a mesh generation it is advisable to check theconnectivity of the mesh by ‘Graphics Graphic Settings Highlight Edges’ startupDESIGN LAYERPart is excluded by volumeScale: 1:164.5Labels:Area Prop. Ref.sArea Group No.sHighlighted:Edgeszy8xC.1Axis 2zC7xg1p3B.1yAxis 1g1p2B6A.15g4p44g1p132A1yzxTrGen 04.gwb(without the mesh)Add skew wing columns, rigid diaphragm and loading Create columns using the sculpt ‘extrude’ option. Create rigid constraints. Define load case titles. Define face loading, grid loading and node loading. Define a combination case.5.1 Set Graphic ‘Graphic View’ (any cursor mode)View to Right-click on the Graphic View background; ‘Switch layer’Analysis(Switches to ‘Analysis Layer’ - yellow background.)Layer(Elements exist on the Design Layer)5.2 View whole (The view is currently of a defined volume.)modelEither: ‘Graphic View Volume’ cursor mode Click anywhere in the viewOr: Graphic View ‘Lists’ toolbar; ‘Reset to All Entities’(Not enabled when all entities are being displayed.)GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20088 of 22
5.3 Extrudecolumns‘Graphic View Select nodes’ cursor mode Select the nodes at which we want new columns to support theskew wing of the slab‘Sculpt Extrude Selection’ ‘Direction of extrusion’: ‘Global z ‘Number of increments’: 1 ‘Increment length’: -3.5 Set ‘Include Beam elements along extrusion’‘Graphic View Select elements’ cursor mode Select the new elements‘Graphic View’) on elements: element x axis Label ((New columns are pointing downwards.) ‘Sculpt Flip Elements’Label () on elements: section shapes(New columns need to be rotated.) ‘Sculpt Modify Selection’ ‘Modify orientation angle’ to 30 degrees‘Graphic View Select nodes’ cursor mode Select the nodes on the 2nd floor ‘Sculpt Create Rigid Constraint’‘Data Constraints Rigid Constraints’ (or from the Gateway) to openthe ‘Rigid Constraints’ table For the new rigid constraint, set the ‘Type of linkage’ to ‘XYPlane’(i.e. the nodes will behave rigidly in the xy plane andindependently in the Z direction.)‘Data Cases and Tasks Load Case Titles’ to open the ‘Load CaseTitles’ table, to add the following: Case 1 “Dead load” (already entered by New Model Wizard) Case 2 “First floor – face loads” Case 3 “Second floor - GAL” Case 4 “Roof – GAL” Case 5 “Wind load”‘Data Loading 2D Element Loading Face Loads’ to open the ‘2DElement Loading Face Loads’ table, to add the following: Element list PA1 to PA*, load case 2, in the global Z direction,value -10kN/m2‘Data Loading Grid Loading Grid Area Loads’ to open the ‘GridLoading Grid Area Loads’ table, to add the following: Grid plane “2nd floor”, Area type “Plane”, load case 3, in theglobal Z direction, value -10kN/m2 Grid plane “3rd floor”, Area type “Plane”, load case 4, “ ”(to copy the rest of the row from the row above)(We’re about to define a polyline on the roof. Polylines are defined onthe current grid plane.)‘Graphic View’ (any cursor mode) Right-click on any node at roof level; ‘Set Current Grid toThis’Ensure grid is displayed, and ‘snap to grid points’ is switched off ‘Sculpt’ toolbar; ‘Grid’ ‘Sculpt’ toolbar; ‘Snap to grid points‘ 5.4 Assign rigidconstraint to2nd floor5.5 Load casetitles5.6 Face load onslab5.7 ‘Plane’ gridarea loads5.8 Set currentgrid to “3rdfloor”5.9 ‘Polyline’grid arealoadGSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 20089 of 22
5.10 Wind load5.11 Check theloading‘Graphic View Polyline’ cursor mode Click on roof to form vertices of polyline(The polyline will define the area that is to be loaded.)(In this context the polyline will be assume to be closed, so youdon’t need to click on the start point to close the polyline.) Right-click on the Graphic View background; ‘Create GridLoading Create Grid Area Load’; enter:o Load case 4, global Z direction, value -5kN Esc to clear the polyline‘Graphic View Select nodes’ cursor mode Either: Select the nodes at X 0 at the roof levelo Or: right-click on the Graphic View background;‘Select List’ and enter ‘Y37’; OK Right-click on the Graphic View background; ‘Create NodalLoading Create Node Load’; enter:o Load case 5, global X direction, value 20kN‘Graphic View’ On the ‘Display Favourites’ toolbar; ‘All load diagrams’On the Graphic View ‘Lists’ toolbar; ‘Next case’(To step through the load cases.)‘Data Cases and Tasks Combination Cases’ to open the‘Combination Cases’ table, to add the following: “Design”, “1.4A1 1.6A2 1.6A3”(A combination case is a means of combining analysis results. Thecombining occurs post-analysis, at the time the results are required fordisplay.) 5.12 CombinationcasestartupScale: 1:163.9Highlighted:EdgesGrid Area Loads, Force: 5000. N/m²/pic.cmCase: L4 : Roof - GALRgd1xyzyxAxis 2zxyAxis 1zyxTrGen 05.gwbAnalysis stages and linear static analysis Set up several analysis stages. Assign different restraint and constraint conditions per stage. Perform a linear static analysis of an analysis stage.6.1 Reset‘Graphic View (analysis layer)’display ‘Graphic Display’ toolbar; ‘Reset display adornments’6.2 Analysis‘Data Analysis Stages Stage Definition’ to open the ‘StagestagesDefinition’ table, to add the following:GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200810 of 22
6.3 Differentrestraints perstage6.4 Differentrigidconstraintsper stage6.5 Inspectstages‘Graphic View (analysis layer)’ : ‘Display Favourites’ toolbar; ‘Label restraints’‘Graphic View Select nodes’ cursor mode Select all restrained nodes Right-click on the Graphic View background; ‘ModifySelected Nodes’ Restraint type: ‘Free’; OK Esc to clear the selection‘Data Constraints Generalised Restraints’ to open the ‘GeneralisedRestraints’ table, to add the following: “footfall model”, “1st floor column positions”: pinned restraint(i.e. restraint in x y z directions) Other stages, “XY1”: encastred restraint (i.e. restraint in x y zxx yy zz directions)‘Graphic View (analysis layer)’ Label () on nodes: Rigid constraints‘Data Constraints Rigid Constraints’ to open the ‘Rigid Constraints’table: Apply the rigid constraint that is currently applied to all stages,to stages “skeletal model”, “GsRaft model” and “full model”,thereby excluding the rigid constraint from other stages Apply to stages “skeletal model” and “GsRaft model” rigidconstraints to “1st floor column positions” with ‘XY plane’linkage(Choose any of the nodes in “1st floor column positions” asmaster.)‘Graphic View (analysis layer)’ On the Graphic View ‘Lists’ toolbar, ‘Stages’,‘Next display’(To step through the stages.)6.6 Linear static ‘Analysis New Analysis Task’ to open the ‘Analysis Wizard : Solveranalysis ofOption’ dialog:“full model” Task name: “Linear Static - full model” Solver option: ‘Linear Static’ Analysis stage: “full model”‘Next’ to open the ‘Analysis Wizard : Static Analysis Cases’ dialog: ‘Create default cases’‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Analyse’GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise11 of 22 15 January 2008 Oasys Ltd, 2008
‘Finish’(To initiate the analysis.)‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’view(The task just created and analysed is represented here.)startupAnalysis stage: 1 : skeletal modelScale: ncEncEncEncEncEncEncEncEncEncEncEncEnczyxTrGen 06.gwb(without results)Raft analysis Set up soil interaction data to specify the relationship between the soil (Vdisp data)and structure (GSA data). Set up the Vdisp data to define the soil model. Specify the Vdisp analysis parameters. Perform a raft analysis.7.1 Reset‘Graphic View (analysis layer)’display ‘Graphic Display’ toolbar; ‘Reset display adornments’7.2 Delete‘GSA’ toolbar; ‘Erase all results’results(Results need to be erased to allow raft data to be added.)7.3 Soilinteractionnodes7.4 Soil profiles(Deleting the results does not delete the analysis tasks.)‘Data Raft Soil Interaction’ to open the ‘Soil Interaction’ table, toadd the following:‘Data Raft Vdisp Data Soil Profiles’ to open the ‘Soil Profiles’table, to add the following:GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200812 of 22
- and:7.5 Soil zones‘Data Raft Vdisp Data Soil Zones’ to open the ‘Soil Zones’ table, toadd the following:7.6 Vdispanalysisparameters‘Data Raft Vdisp Data Analysis Parameters’ to open the ‘AnalysisParameters’ dialog:GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200813 of 22
7.7 Raft analysisof ‘GsRaftmodel”‘Analysis New Analysis Task’ to open the ‘Analysis Wizard : SolverOption’ dialog: Task name: “Raft – GsRaft model” Solver option: ‘Raft’ Analysis stage: “GsRaft model”‘Next’ to open the ‘Analysis Wizard : GsRaft Control’ dialog:(Default settings.)‘Next’ to open the ‘Analysis Wizard : Static Analysis Cases’ dialog: Add “L1 L3 L4”‘Next’ to open the ‘Analysis Wizard : GsRaft Progress’ dialog:(Default settings.)‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Don’t analyse now’‘Finish’‘GSA’ toolbar; ‘Analyse all’(To analyse all analysis tasks that are set up but not analysed.)startupAnalysis stage: 2 : GsRaft modelScale: 1:169.2Labels:Soil Interaction No.sSoil Interaction zyxTrGen 07.gwb(without results)GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200814 of 22
P-δ, buckling and dynamic analysis Specify a static P-δ analysis task. Specify a buckling analysis task. Specify a modal analysis task. Perform analysis of the specified tasks. Set up data for response spectrum analysis. Specify and analyse a response spectrum analysis. Specify an SRSS combination case of basic responses. Specify and analyse a footfall analysis.‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’8.1 Staticanalysis ofview“buckling Right-click on background of Analysis Tasks View; ‘Newmodel” taskAnalysis Task’(Alternative to ‘Analysis New Analysis Task’.) Task name: “Linear Static - buckling model” Solver option: ‘Linear Static’ Analysis stage: “buckling model”‘Next’ to open the ‘Analysis Wizard : Static Analysis Cases’ dialog: Add “L1”, “L3”, “L4” and “L5”, as separate analysis cases(Double-click on the load cases to add them to the description.)(L2 is face loading applied to 2D elements, which are notincluded in the “buckling model” stage.)‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Don’t analyse now’‘Finish’8.2 Static P-δ‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’analysis ofview“buckling Right-click on background of Analysis Tasks View; ‘Newmodel” taskAnalysis Task’ Task name: “Static P-delta – buckling model” Solver option: ‘Static P-delta’ Analysis stage: “buckling model”‘Next’ to open the ‘Analysis Wizard : GSS Static P-delta’ dialog: Select ‘P-delta analysis with each analysis case defining itsown differential stiffness’‘Next’ to open the ‘Analysis Wizard : Static Analysis Cases’ dialog: Add ‘Name’: “P-delta”; ‘Description’: “L1 L5”‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Don’t analyse now’‘Finish’8.3 Buckling‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’analysis ofview“buckling Right-click on background of Analysis Tasks View; ‘Newmodel” taskAnalysis Task’ Task name: “Modal Buckling – buckling model” Solver option: ‘Buckling Modal’ Analysis stage: “buckling model”‘Next’ to open the ‘Analysis Wizard : GSS Buckling Parameters’dialog: ‘Number of modes’: 6 ‘P-delta analysis case’: “L1 L5” ‘Maximum no. iterations’: 128‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog:GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200815 of 22
8.4 Modalanalysis of“full model”task8.5 Analyse8.6 Responsespectrumdata8.7 Responsespectrumanalysis of“full model” ‘Don’t analyse now’‘Finish’‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’view Right-click on background of Analysis Tasks View; ‘NewAnalysis Task’ Task name: “Modal– full model” Solver option: ‘Dynamic Modal’ Analysis stage: “full model”‘Next’ to open the ‘Analysis Wizard : GSS Modal DynamicParameters’ dialog: ‘Number of modes’: 5 ‘Maximum no. iterations’: 128 ‘Start mode’: 1 ‘Additional restraint’: none ‘Mass option’: ‘Lump mass at nodes’ ‘Mass derived from loads’: “L1”, “Z”‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Don’t analyse now’‘Finish’‘GSA’ toolbar; ‘Analyse all’(Analyses all the tasks that haven’t been analysed yet.)‘Data Dynamic Response Response Spectra’ to open the ‘ResponseSpectra’ table‘Data Options’ toolbar; ‘Wizard’ () to open the ‘ResponseSpectrum Wizard’ dialog Select ‘Eurocode 8’ (leave default parameters unchanged)‘Data Dynamic Response Basic Responses’ to open the ‘BasicResponses’ table, to add the following: ‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’view Right-click on background of Analysis Tasks View; ‘NewAnalysis Task’ Task name: “Response Spectrum – full model” Solver option: ‘Dynamic response Response Spectrum’ Analysis stage: “full model”‘Next’ to open the ‘Analysis Wizard : Response Spectrum Parameters’dialog: ‘Modal analysis task’: (check that modal task is referenced) (leave other settings as default)‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog:GSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise15 January 2008 Oasys Ltd, 200816 of 22
8.8 SRSScombinationcase of basicresponses8.9 Footfallanalysis of“footfallmodel” ‘Analyse’‘Finish’‘Data Cases and Tasks Combination Cases’ to open the‘Combination Cases’ table, to add the following: “SRSS of basic responses”, “SRSS(A20, 0.35A21, 0.35A22)”(- or whatever the response spectrum analysis case turn out tobe!)‘Data Cases and Tasks Analysis Tasks’ to open the ‘Analysis Tasks’view Modal analysis of “footfall model” Right-click on background of Analysis Tasks View; ‘NewAnalysis Task’ Task name: “Footfall – footfall model” Solver option: ‘Dynamic response Footfall’ Analysis stage: “footfall model”‘Next’ to open the ‘Analysis Wizard : Response Spectrum Parameters’dialog: ‘Modal analysis task’: (check that modal task is referenced) (leave other settings as default)‘Next’ to open the ‘Analysis Wizard : Cases Set Up’ dialog: ‘Analyse’‘Finish’startupAnal ysi s stage: 5 : footfal l m odelScale: inPinPinPinPinPinPinPinPinzyxTrGen 08.gwb(without results)Create Members for Design Create RC members. Create steel members.9.1 Create RC‘Graphic View (analysis layer) Select elements’ cursor modemembers Right-click on the Graphic View background; ‘Select List’;“PB1 to PB10”; OK(to select all beam elements that reference concrete sections)‘Tools Manipulate Model Create members from elements’ ‘Element list’: “ current selection ” Select ‘1 element 1 member’9.2 Create steel‘Graphic View (analysis layer) Select elements’ cursor modemembers Select beam elements that reference steel sections, but nottransverse elementsGSA Step Thru’ Tutorial – ‘General Use of GSA’ training exercise17 of 2215 January 2008 Oasys Ltd, 2008
9.3 Inspectmembers‘Tools Manipulate Model Create members from elements’ ‘Element list’: “ current selection ” Select ‘1 element 1 member’‘Graphic View (analysis layer) Select elements’ cursor mode Select transverse beam elements that reference steel sections‘Tools Manipulate Model Create members from elements’ ‘Element list’: “ current selection ” Select ‘Many elements 1 member’ Don’t ‘Divide members at intersections with columns’‘Graphic View (design layer)’ ‘Graphic Display’ toolbar; ‘Shrink’ ‘Graphic Display’ toolbar; ‘Section display’startupDESIGN LA YERScale: 1:175.9zyxTrGen 09.gwb(without results)Design Properties Specify design codes. Modify design property references and member restraint property references. Specify steel design properties. Spe
Oasys GSA 'Step Through' Tutorial: 'General Use of GSA' training exercise This tutorial guides you through the process of setting up a GSA model one step at a time.
