Llumped Plasticity not running

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EMNV
Posts: 12
Joined: Tue Dec 03, 2024 4:29 am

Llumped Plasticity not running

Post by EMNV » Tue Dec 03, 2024 5:32 am

Hello everyone,
Thank you for taking the time to read this. I am working on a simple model of a cantilever column subjected to lateral loading using a concentrated plasticity model. The analysis runs without convergence issues; however, the plastic hinge does not "activate." I am attaching the model and would greatly appreciate any insights.

Best regards,
EMNV

P.S. Let's create a Reddit group to discuss STKO!
Mo&Wang_IMK_v01.rar
(86.25 KiB) Downloaded 89 times

STKO Team
Posts: 3066
Joined: Tue Oct 29, 2019 8:45 am

Re: Llumped Plasticity not running

Post by STKO Team » Tue Dec 03, 2024 9:44 am

  • You are pushing in global X, so the rotation will happen about the "local Y" axis of the element (so in the zero length the hinge should be at the 5 local DOF)
  • Why are you doing a dynamic analysis? You simply need a static one with that imposed cyclic displacement history
Try this:
Mo&Wang_IMK_v01.zip
(135.59 KiB) Downloaded 97 times

EMNV
Posts: 12
Joined: Tue Dec 03, 2024 4:29 am

Re: Llumped Plasticity not running

Post by EMNV » Tue Dec 03, 2024 1:58 pm

Thank you very much for the observation; I now see the mistake. I really appreciate your help.

STKO Team
Posts: 3066
Joined: Tue Oct 29, 2019 8:45 am

Re: Llumped Plasticity not running

Post by STKO Team » Mon Dec 09, 2024 9:58 am

You're welcome

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