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I have the similiar problem.But I get a very large peroid when I do the eigen analysis. When i change the "equalDOF 1 2 1 2" into "equalDOF 1 2 1 2 3", the peroid seems reasonable. But then i do the pushover analysis , the base force is 0. Who can help me ?

Thank you very much, fmk .
You are really as kind as you look !

Hello everuone!
Can the uniaxialMaterial Bilin be used in element dispBeamColumn ? The section of element is defined in fiber .
I am looking forwad your kind help!

Hello !
Maybe you should change "element zeroLength 2 1 2 -mat $eleID -dir 3" into "element zeroLength 2 1 2 -mat $eleID -dir 6". Try it !

Sorry ! The Warrings part is not right. The right is should be : OpenSees > source Ex2b.Canti2D.InelasticSection.Push.tcl Model Built Node::addunbalLoad - load to add of incorrect size 6 should be 3 WARNING DisplacementControl::newStep() dUahat is zero -- zero reference displace ment at control node...

Hello ! Why the example about "Ex2b.Canti2D.InelasticSection.Push.tcl" in the OpenSees Website cannot run corretely ? There are following warnnings : OpenSees > source analyze.Static.Push.tcl 重力分析完成... Node::addunbalLoad - load to add of incorrect size 6 should be 3 WARNING DisplacementCon...