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hey mja441,

What is the $i should be at the beginning of your code?

I solved the problem with building period, the problem is the structure is too stiff with constrain of the rigid diaphragm. Now after i remove all equalDOF on the panel zone, the building period are correct.

Thank you so much Vesna. Do you know anyone who have an example of Panel zone other than the one provide in the Opensees Wiki?

Right, the shapes of the model looks right, rotational spring is connected with the bottom nodes. yes you are right, the bottom column node are all fix except the leaning column. I only use equalDof constrained the x displacement of the 2nd, 3rd and 4th floor . Yet, after adding the panel zone this ...

Hello, I have follow the example from Opensees Wiki "Pushover and Dynamic Analyses of 2-Story Moment Frame with Panel Zones and RBS" to model a classic 3 story 4 bay building which you can see in this link " http://i42.tinypic.com/a41n2b.jpg " . I follow exact the same layout and...

Can anyone help, i build this very simple model 2 story 1 bay with elasticBeamColumn and rotational spring to simulate the plastic hinge. I check and recheck numerous time. it still keep Pop up error of " Warning BandGenLinLapckSolver::Solve<> -LAPACK routine returned 4,7,7,7,7,7,7" and gi...