OpenSees, the Open System for Earthquake Engineering Simulation

[bernd]

double posted! Is solved here https://forum.freecadweb.org/viewtopic. ... 70#p380760

EDIT: some posts moved to the topic link above

[ebrahim raeyat]

@bernd. I want to prepare such a software at the end of this process:

what is your opinion for apply BIM in FEM WB? how can we apply that?

http://open-bim.en.cype.com/

[ebrahim raeyat]

In continues this post, also for defining transformation in OpenSees i need to know which element has which direction to assign proper section properties to it. thanks.

https://opensees.berkeley.edu/wiki/inde ... sformation

[ebrahim raeyat]

@bernd. I analysed this model successfully with opensees. but still i can't assign proper section to each element, can you please tell me?

arzoomandi.png (29.85 KiB) Viewed 1918 times

arzoomandi.FCStd

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[bernd]

In continues this post, also for defining transformation in OpenSees i need to know which element has which direction to assign proper section properties to it. thanks.

https://opensees.berkeley.edu/wiki/inde ... sformation

see this https://github.com/FreeCAD/FreeCAD/blob ... se.py#L405

In ccx writer I had to get these local rotations too.

[ebrahim raeyat]

see this https://github.com/FreeCAD/FreeCAD/blob ... se.py#L405

In ccx writer I had to get these local rotations too.

thanks, you mean i must assign Elementrotation1D to each beam or column or a bunch of those?

@bernd, i think if we create another workbench that specially suite for structural engineering is useful, because FEM workbench is very general workbench. like csiamerican products sap2000 and etabs. sap2000 is a general FEM program, while etabs is suite specifically for structural engineering. in real word we only need beam-column and shell element and later for nonlinear analysis some additional element that thos also has 1D or 2D dimensions. what is your opinion?

[bernd]

see this https://github.com/FreeCAD/FreeCAD/blob ... se.py#L405

In ccx writer I had to get these local rotations too.

thanks, you mean i must assign Elementrotation1D to each beam or column or a bunch of those?

@bernd, i think if we create another workbench that specially suite for structural engineering is useful, because FEM workbench is very general workbench. like csiamerican products sap2000 and etabs. sap2000 is a general FEM program, while etabs is suite specifically for structural engineering. in real word we only need beam-column and shell element and later for nonlinear analysis some additional element that thos also has 1D or 2D dimensions. what is your opinion?

I am totally with you. Something between Arch (BIM) and FEM. Something which uses the Arch structural nodes and makes in put of loads an load combinations very easy. There is just one little problem with this. TIME ... I have this in mind for years, but never started to do some serious code in this regard.

bernd

[ebrahim raeyat]

I am totally with you. Something between Arch (BIM) and FEM. Something which uses the Arch structural nodes and makes in put of loads an load combinations very easy. There is just one little problem with this. TIME ... I have this in mind for years, but never started to do some serious code in this regard.

bernd

yes, time!! i created new topic.

[ebrahim raeyat]

@bernd, I can view the displacement of model in 3 DOF system, but when i create a 3D model with 6 DOF, paraview don't show displacement of structure. this is my opensees FreeCAD model, in this post. i send you a PR. to run this you must merge that.

also i want to apply result class in opensees. opensees gives me *.pvd output.

[bernd]

Which of the cantilever examples works wirh opensees writer?