How to adjust the hysteresis curve

[[email protected]]

Thanks to STKO I was able to build my own model quickly, but I had difficulty adjusting the hysteresis curve (the curve of the top of the column with respect to force and displacement). Anyway, I can't get the trend I want, can you help me with a little advice, thank you very much.

[STKO Team]

Your model is mainly governed by the Pinching4 material of the node.
However the Pinching4 shows pinching only on reloading, but not in the backbone.
Instead, your experimental curve shows pinching also in the backbone.

You can try to build the behavior you want, starting from simple materials and combining them in parallel.
The last material in this file (

7-2.zip

(218.04 KiB) Downloaded 261 times

) is a simple demonstration (of course you have to adjust material parameters, I just put some representative values):

PIN.png (95.61 KiB) Viewed 3417 times

[[email protected]]

When I want to test the material, the curve cannot be displayed, why is that

[STKO Team]

This is strange. It looks like OpenSees is printing a special character to the console.
Try this:
Copy this modified script (unzip it first) in C:\Program Files\STKO\external_solvers\opensees\utils\Gui and replace the current one.

TesterUtils.zip

(1.12 KiB) Downloaded 247 times

It will print some extra debug information to the STKO's Terminal.
Please, copy the output from the STKO's terminal and paste it here.

[[email protected]]

I made a replacement, but unfortunately it doesn't seem to work.

[STKO Team]

I need the whole text in the terminal, not just a screenshot.
I didn't put anything to solve the problem, I just put some extra debug info to better understand where the issue is.
Please click in the terminal and selectAll->copy->paste here

[[email protected]]

Base Context:
OpenGL [version:4.5][profile: Compatibility profile][sharing: false][GLSL: 4.50 - Build 23.20.16.4973]

New Context:
OpenGL [version:4.5][profile: Compatibility profile][sharing: true][GLSL: 4.50 - Build 23.20.16.4973]

New Context:
OpenGL [version:4.5][profile: Compatibility profile][sharing: true][GLSL: 4.50 - Build 23.20.16.4973]
importing providers from C:/Program Files/STKO\cmd_providers
providers modules:
['MpcCoreCmdAnalysis', 'MpcCoreCmdGeometry', 'MpcCoreCmdGeometryCrv', 'MpcCoreCmdGeometryPnt', 'MpcCoreCmdGeometrySld', 'MpcCoreCmdGeometrySrf', 'MpcCoreCmdMesh', 'MpcCoreCmdPostProc', 'MpcCoreCmdStandard']
<module 'MpcCoreCmdAnalysis' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdAnalysis.pyd'>
registering command: "NewDefinition"
registering command: "DeleteDefinition"
registering command: "CloneDefinition"
registering command: "EditDefinition"
registering command: "ShiftDefinition"
registering command: "NewPhysicalProperty"
registering command: "DeletePhysicalProperty"
registering command: "ClonePhysicalProperty"
registering command: "EditPhysicalProperty"
registering command: "AssignPhysicalProperty"
registering command: "UnassignPhysicalProperty"
registering command: "SelectByPhysicalProperty"
registering command: "HideByPhysicalProperty"
registering command: "ShowByPhysicalProperty"
registering command: "ShiftPhysicalProperty"
registering command: "NewElementProperty"
registering command: "DeleteElementProperty"
registering command: "CloneElementProperty"
registering command: "EditElementProperty"
registering command: "AssignElementProperty"
registering command: "UnassignElementProperty"
registering command: "SelectByElementProperty"
registering command: "HideByElementProperty"
registering command: "ShowByElementProperty"
registering command: "ShiftElementProperty"
registering command: "NewCondition"
registering command: "DeleteCondition"
registering command: "EditCondition"
registering command: "CloneCondition"
registering command: "ShiftCondition"
registering command: "NewAnalysisStep"
registering command: "DeleteAnalysisStep"
registering command: "CloneAnalysisStep"
registering command: "EditAnalysisStep"
registering command: "ShiftAnalysisStep"
registering command: "WriteInputFile"
registering command: "Kits"
registering command: "RunAnalysis"
registering command: "PropertyAssignmentLog"
<module 'MpcCoreCmdGeometry' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdGeometry.pyd'>
registering command: "ImportGeometry"
registering command: "ExportGeometry"
registering command: "DeleteGeometry"
registering command: "QueryGeometry"
registering command: "Explode"
registering command: "MakeCompound"
registering command: "Copy"
registering command: "Move"
registering command: "Rotate"
registering command: "Scale"
registering command: "Mirror"
registering command: "Union"
registering command: "Defeaturing"
registering command: "RepairFix"
registering command: "Reverse"
registering command: "Subtract"
registering command: "Intersect"
registering command: "Merge"
registering command: "Sweep"
registering command: "Extract"
registering command: "Extrude"
registering command: "ShiftGeometry"
registering command: "GeometryRename"
registering command: "SelectionSetNew"
registering command: "SelectionSetRename"
registering command: "SelectionSetDelete"
registering command: "SelectionSetAddToSelectionSet"
registering command: "SelectionSetRemoveFromSelectionSet"
registering command: "SelectionSetSelect"
registering command: "SelectionSetUnselect"
registering command: "ShiftSelectionSet"
registering command: "NewInteraction"
registering command: "DeleteInteraction"
registering command: "EditInteraction"
registering command: "ShiftInteraction"
registering command: "NewLocalAxes"
registering command: "EditLocalAxes"
registering command: "DeleteLocalAxes"
registering command: "AssignLocalAxes"
registering command: "UnassignLocalAxes"
registering command: "ShiftLocalAxes"
<module 'MpcCoreCmdGeometryCrv' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdGeometryCrv.pyd'>
registering command: "Lines"
registering command: "Spline"
registering command: "Rectangle"
registering command: "Circle"
registering command: "Ellipse"
registering command: "ArcOfEllipse"
registering command: "MakeWire"
<module 'MpcCoreCmdGeometryPnt' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdGeometryPnt.pyd'>
registering command: "Point"
<module 'MpcCoreCmdGeometrySld' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdGeometrySld.pyd'>
registering command: "Sphere"
registering command: "Parallelepiped"
registering command: "Cylinder"
<module 'MpcCoreCmdGeometrySrf' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdGeometrySrf.pyd'>
registering command: "Loft"
registering command: "PlanarFace"
registering command: "Face4"
registering command: "SewFaces"
<module 'MpcCoreCmdMesh' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdMesh.pyd'>
registering command: "SetGlobalEdgeSeed"
registering command: "SetEdgeSeed"
registering command: "RemoveEdgeSeed"
registering command: "SetMeshControls"
registering command: "BuildMesh"
registering command: "Partition"
<module 'MpcCoreCmdPostProc' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdPostProc.pyd'>
registering command: "OpenDatabase"
registering command: "CloseDatabase"
registering command: "ReloadDatabase"
registering command: "NewPlotGroup"
registering command: "DeletePlotGroup"
registering command: "DeletePlot"
registering command: "DeformedShape"
registering command: "SurfaceColorMap"
registering command: "VolumeColorMap"
registering command: "FiberColorMap"
registering command: "GaussPointPlot"
registering command: "VectorPlot"
registering command: "BeamDiagramPlot"
registering command: "CrackPlot"
registering command: "ExtractChartData"
registering command: "DeleteChart"
registering command: "DeleteChartData"
registering command: "SetVisibleOdpSubset"
registering command: "SetHiddenOdpSubset"
registering command: "SetAllVisiblePlot"
<module 'MpcCoreCmdStandard' from 'C:/Program Files/STKO\\cmd_providers\\MpcCoreCmdStandard.pyd'>
registering command: "Regenerate"
registering command: "NewPreDocument"
registering command: "OpenPreDocument"
registering command: "SavePreDocument"
registering command: "SavePreDocumentAs"
registering command: "ClosePreDocument"
registering command: "NewPostDocument"
registering command: "OpenPostDocument"
registering command: "SavePostDocument"
registering command: "SavePostDocumentAs"
registering command: "ClosePostDocument"
registering command: "Quit"
registering command: "SetContext_PreProcessor"
registering command: "SetContext_PostProcessor"
registering command: "SetPreProcessorContext_Geometry"
registering command: "SetPreProcessorContext_Property"
registering command: "SetPreProcessorContext_Condition"
registering command: "SetPreProcessorContext_Mesh"
registering command: "Workplane3Points"
registering command: "ParallelWorkplane"
registering command: "AddWorkplane"
registering command: "RenameWorkplane"
registering command: "UseWorkplane"
registering command: "ModifyWorkplane"
registering command: "RemoveWorkplane"
registering command: "Show"
registering command: "ShowAll"
registering command: "Hide"
-------------------------------------------------------
VERTEX SHADER INFO LOG:
FRAGMENT SHADER INFO LOG:
SHADER PROGRAM INFO LOG:
-------------------------------------------------------
--------------------------------------------------------
Python Interface Initialization
(global)
--------------------------------------------------------

Available external solvers:
opensees

Command: NewPreDocument
New file succesfully created as "Untitled".
End Command: NewPreDocument
--------------------------------------------------------
Python Interface Initialization
(document-wise)
--------------------------------------------------------
Initializing python interface of new document
--------------------------------------------------------

Loading External Solver: OpenSees
Command: NewPostDocument
New file succesfully created as "Untitled".
End Command: NewPostDocument
Command: Regenerate
Nothing to regenerate.
Command: OpenPreDocument
Generated 2 fibers
Generated 2 fibers
Generated 2 fibers
Generated 2 fibers
Generated 1 fibers
Generated 2 fibers
Generated 2 fibers
File "E:/Downloads/7-2 (1)/7-2.scd" succesfully loaded.
End Command: OpenPreDocument
--------------------------------------------------------
Python Interface Initialization
(document-wise)
--------------------------------------------------------
Initializing python interface of new document
--------------------------------------------------------

Loading External Solver: OpenSees
Command: Regenerate
Command: EditPhysicalProperty
Working directory: "C:/Users/王/AppData/Local/ASDEA Software Technology/STKO/Tester1D"
Script file: "C:/Users/王/AppData/Local/ASDEA Software Technology/STKO/Tester1D/script.tcl"
Output file: "C:/Users/王/AppData/Local/ASDEA Software Technology/STKO/Tester1D/output.txt"
writing physical_properties...
Running OpenSEES
command: C:/OpenSees-Solvers/opensees.bat
args: C:/Users/王/AppData/Local/ASDEA Software Technology/STKO/Tester1D/script.tcl
b'\r\n'

b'\r\n'

b' OpenSees -- Open System For Earthquake Engineering Simulation\r\n'
OpenSees -- Open System For Earthquake Engineering Simulation
b' Pacific Earthquake Engineering Research Center\r\n'
Pacific Earthquake Engineering Research Center
b' Version 3.4.0 64-Bit\r\n'
Version 3.4.0 64-Bit
b'\r\n'

b' (c) Copyright 1999-2016 The Regents of the University of California\r\n'
(c) Copyright 1999-2016 The Regents of the University of California
b' All Rights Reserved\r\n'
All Rights Reserved
b' (Copyright and Disclaimer @ http://www.berkeley.edu/OpenSees/copyright.html)\r\n'
(Copyright and Disclaimer @ http://www.berkeley.edu/OpenSees/copyright.html)
b'\r\n'

b'\r\n'

b'couldn\'t read file "C:/Users/\xcd\xf5\xb1\xa3/AppData/Local/ASDEA Software Technology/STKO/Tester1D/script.tcl": no such file or directory\r\n'
Error:
Traceback (most recent call last):
File "C:/Program Files/STKO\external_solvers\opensees\physical_properties\utils\tester\Tester1D.py", line 880, in onTestClicked
self.tester.run()
File "C:/Program Files/STKO\external_solvers\opensees\physical_properties\utils\tester\Tester1D.py", line 183, in run
for item in tu.executeAsync([opensees_cmd, temp_script_file], temp_dir):
File "C:/Program Files/STKO\external_solvers\opensees\utils\Gui\TesterUtils.py", line 42, in executeAsync
nextline = bline.decode().rstrip()
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xcd in position 29: invalid continuation byte
Abort Command: EditPhysicalProperty
Dear STKO team, I'm sorry for not understanding what you mean, I think this should be what you need.