The OpenSees Community

The sign of the moment depends on orientation of local z axis, not on local x.

I just want to add a comment on sign for the moment in a cross section. It depends on the local coordinate system that you set for your section. If local y is pointing up and local z to the left, positive moment will put bottom of the section in tension. However, if local y is pointing down and loca...

You can use zeroLength element and assign to it a uniaxial material that is representative of behavior that you are trying to model. If you want your element to fail at ductility level of 3, MinMax material will do it.

Ella, You need to record the curvature at two integration points that approximately encompass the plastic hinge region, not the first and the last integration point of the beam. Ameri, You need to calculate rotation at yielding for each plastic hinge and use it as a trigger to trace plastic deformat...

When using timeSeries you need to specify timeSeries tag:
timeSeries Path 10 -dt $dt -filePath $GMfile -factor [expr $Scalefact*$g];

After that define the recorder and the load pattern.

Here is an example of the recorder:
recorder Node -file dataDir/Accel_S1.out -timeSeries 10 -node 11 -dof 1 accel;

Leaning column can be added to the 2D model of a frame to capture the effect that the gravity system has on lateral-load resisting frame. It does not matter if the frame is peripheral or middle.

I am not familiar with FEMA acceptance criteria and can not comment on that one. basicDeforamtion and ChordDeformation create the same output and are better option than plasticDeformation or plasticRotation. Several users reported problems with plasticDeformation recorder. However, I think that the ...

you will need to write a script that will do it for you. You basically need to record curvature at two integration points that encompass the plastic hinge region. Using this curvatures you can calculate plastic hinge rotations. Plot them as a function of time for plastic hinges. Calculate rotation a...

How did you model beam and column elements?

Would you post your recorder so we can test it.

Can you try zeroLenght element with Maxwell material?

Try to contact the developer of the material directly.

Could you please reformulate your question. It is hard to understand.

Unfortunately, there is no reference for hysteretic material. Professor Filippou, who is the developer of the material, never wrote a paper about it. The OpenSees source code is the only place where you can find the equations you are looking for.

Can you post the full message that you get from OpenSees?