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Thank you Jeena, your advice helped me to find a solution. After creating the new section tags I added the following code and the model ran to completion with reasonable results. # assign torsional Stiffness for 3D Model set Ubig 1e9; uniaxialMaterial Elastic $SecTagTorsion $Ubig section Aggregator ...

Thank you for the reply. I am currently using constraints type Transformation in the analysis. The only other thing I can think of changing is the orient command for the zero-length element, but adjustments have not helped. Input in LibAnalysisDynamicParameters.tcl: constraints Transformation number...

Here is a copy of the working script without the zero-length element and only two nodes. # units: kip, in wipe model BasicBuilder -ndm 3 -ndf 6 source RCcircSection.tcl; # procedure for definining RC fiber section set LCol 96; set PCol 175.0; set IDconcCore 1; set IDconcCover 2; set IDreinf 3; set I...

Hi, I have ran into a problem with using a zero-length section to model strain penetration at the base of a cantilever column subjected to bi-directional displacement controlled loading modeled via multi-support excitation. The model works fine before adding the zero-length element; however, after a...