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sorry, something happend to the above sketch...
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Dear Silvia and Dear Frank, Does it work to use the collapse recorder for infill removal in case when the axial strut is connected not top-to-bottom ends of of a bay columns but have end offsets from the column nodes, see the sketch? _______________ |- | | - | | - | | - | | -| Using the Collapse rec...

Do you want to use fibersection or use simplified macromodel approach?
I can help you with macromodel approach (particularly equivalent frame method).

you can try with hysteretic material

dear setareh
Your model has unsymmetric nonlinear model with e1n=0. try with very small, if you want, nonzero number...I checked it works!

dear nrojas you can use hysteretic material to represent the response of a "Thin Takeda" hysteretic model. Which is usually recommended for nonlinear response of columns. For the case of beams, this will be a little conservative consideration in terms of energy dissipation, which is usuall...

For those who are interested to use OpenSees for static and dynamic analysis of masonry buildings using simplified Equivalent Frame Method. Access to the following article. Ahmad, N., Crowley, H., Pinho, R., Ali, Q., [2010] "Displacement-based earthquake loss assessment of masonry buildings in ...

Hi developers I am doing seismic analysis of URM using Equivalent Frame approach, elastic frame elements with nonlinear zerolength element (defined using hysteretic material for shear response). I want to update the shear strength of piers in each step for corresponding axial loads. I am doing this ...