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Hi Fabiola,

The problem why you couldn't run it was that when you assign your triangular_elements you selected not only faces but also edges and nodes. I reassigned it and now it runs. But now it asks you to insert peakShearStra for PressureIndependMultiYield Let us know if you need help

Best, Valentina

Thank you so much Valentina!
I changed the parameters; but why doesn't my analysis run?
I attach my file below.
thanks again!!

Try this: The analysis was not running because you set a duration of 0.
Typically static analysis should have a duration of 1 (if you use a linear time series).
After the first analysis you should keep load constant and reset the time to 0 (otherwise it will mess up subsequent time Series)

The the dynamic analysis should have a non-zero duration (I used 25 in this case, due to the duration of your ground motion).
Then, you have to study the analysis settings. Many of them were wrong (system = Linear works only for linear materials, integrator = CentralDifference is for explicit dynamics, not for implicit ones, you don't have any damping, etc..)

Also, I found that applying your self weight assuming the model elastic, gives convergence issues when switching to plastic. So I set the material plastic from the beginning