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For the resisting moment, you should also consider the moments at the bottom of the columns. From equilibrium, overturning moment should be equal to the resisting moment

You can try a different linear system of equations solver and see if it works

You can use the remove command or you can check this link here for an example of automated element removal:

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

In this case, there should be something that makes your model not stable. Did you check your eigenvalues, are they reasonable? What are your periods?

Plastic hinge length equations are all empirical, therefore it is difficult to comment on which one is the best option. But, with the beamwithhinges element, you can choose the larger value not to miss any inelastic effect around the plastic hinge length. You can neglect the axial stiffness by using...

You can also try running OpenSees SP or MP on Design Safe. It may be possible to get more technical support there.

I could not find where $matTag_SD was defined in your script.

You can assign any value. 2f1, 2f2, etc. in the image are used to show the unloading rules.

If the convergence issues start at low levels of inelasticity, that may indicate that there might be some issues with your material. But, overall if it takes long with many iterations, but if it gets completed with meaningful results, it should be okay

With Concrete07, it looks like you need to compute the confined concrete properties yourself, The others would do it for you, but I don't know how good they are. You can always try different materials and record the stress and strain at a fiber and check if it looks like what you want

It looks like you have a leaning column, You can check if the large period is dues to something wrong that you may be defining with that. So one quick check could be to remove the leaning column and see what happens

1e-4 seems to be a bit large. The best way is to use a smaller tolerance (e.g., 1e-8) and if non-convergence happens, try to overcome that using adaptive strategies (including increase of the tolerance only at the problematic time step). You can also consider using energyincr to start with as it con...

There is a potential convergence problem at that step. How does the pushover curve look like before this convergence issue happens? You can try other nonlinear solution algorithms, convergence tests and tolerances. Below is an example of this type of adaptive solution algorithm for nonlinear dynamic...

This study can provide good information on the optimized damper locations:

https://peer.berkeley.edu/sites/default ... _mahin.pdf

load command in Matlab should not be that slow I think. The best approach could be 1) Make sure your OpenSees file works as intended 2) Run all your analyses 3) Do the postprocess with Matlab This may be faster than finishing the complete OpenSees-Matlab cycle for one ground motion and moving to the...