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mhscott

Do not use the Linear algorithm if you have nonlinear response! Use Newton.

mhscott

mhscott

Eigenvalue analysis is not required to do response history analysis.

mhscott

Please provide more details. Are you sure the models are exactly the same?

mhscott

Thanks for reporting this. Looks like this element is in Tcl but not in the Python interpreter for some reason. I will add it.

mhscott

Use Hysteretic or MultiLinear material and set the strength values on the tension side to be very low. It's not elegant, but it should work.

mhscott

Probably not. But you can perform direct analyses to get buckling loads: https://wp.me/pbejzW-Bh

mhscott

Develop it as p-y. Uniaxial materials are scalar functions and have no inherent meaning. The calling objects treat the functions appropriately.

mhscott

It could be an error in the material state determination, or in how you set up the testing script. I can't really tell.

mhscott

You can get the time step from ops_Dt, a global variable. Search the source code for it. You can see an example in BilinearOilDamper.cpp.

mhscott

No, you can only define three points on the backbone of the HystereticMaterial.

mhscott

Try asking for one or two modes instead of five.

mhscott

This presentation by Dr. Minjie Zhu describes parallel computing with OpenSeesPy very well: https://youtu.be/vjGm2kM5Ihc

mhscott

This will be fixed in the next version of OpenSeesPy. For now, use str() like described here: https://wp.me/pbejzW-Si

mhscott

Thanks! I will update the documentation.

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