@mhscottmhscott wrote: ↑Sat Dec 16, 2023 6:29 am You are using truss elements with 3 DOF/node in a 2D model, so the rotational stiffnesses are all zero.
https://portwooddigital.com/2021/09/19/ ... ing-nodes/
Thank you so much, Dr. Scott, for your response.
I added the following lines to my code:
fix 3 0 0 1;
fix 4 0 0 1;
and now it works. The problem is that When I plot displacement vs force(which is reaction in node 2) it does not have unloading and pinching branches ,unlike the figures shown in this link:
https://opensees.berkeley.edu/wiki/inde ... S_Material
Could you please help me with this as well?
(In fact, I did a test based on ASTM E2126-19, and now that I have force-displacement data, I'd like to compare it with the results from OpenSees)
Thanks.