moment curvature

[parasismique]

Hello my colleagues,

I modeled a cantilever with bond slip (element zeroLengthSection). and I need to trace moment-curvature. For this reason I used this command (to compute moment-curvature):

recorder Node -file $ dataDir / rot3.out -time -node 1 -dof 3 disp;

But it seems to me that this commnade gives us only curvature!

How to calculate the moment? !! do we compute moment-curvature by a separate procedure (ie define reference moment and compute curvature increment)? !! knowing that I applied a lateral load (to do a pushover analysis)!

I appreciate your guide and your help.

[EricsonEncinaZ]

Hi,

You can track the moment and curvature directly into the integration point that you are interested in.
- recorder element -xml secDsp.out -time -ele $ele -section $sec displacements
- recorder element -xml secFrc.out -time -ele $ele -section $sec forces
If you are recording a zeroLengthSection element, then omit the "-section $sec" part

If you still want to measure it in the node (I would say you will measure rotation, not curvature)
- recorder Node -xml nodeDsp.out -time -node $nod -dof 3 disp
- recorder Node -xml nodeFrc.out -time -node $nod -dof 3 reaction

I'm using the flag -xml instead -file, so the headers in the file tells you what the results are

[parasismique]

Dear Ericson Encina

Thank you very much my friend for your help. I'm always learning more with you.
Can you send me your Email please.

Hayet.

[Haibo]

Dear Ericson Encina，Do you konw how to obtain the rotation of element end by curvature integral？ thanks！