Analysis did not converge

Gabriele.Neri
Posts: 17
Joined: Wed Feb 21, 2024 9:14 am

Re: Analysis did not converge

Post by Gabriele.Neri » Tue Mar 19, 2024 2:41 pm

Sorry I can't understand, which is the previous post you're talking about?
With the Standard Integration method I can consider plastic hinges with finite length at the ends of beam and column elements?

Thanks in advance

kesavapraba
Posts: 468
Joined: Sat Mar 28, 2020 2:25 pm

Re: Analysis did not converge

Post by kesavapraba » Tue Mar 19, 2024 2:48 pm

By previous post, I referred to the option, where you can model the beam-column element with distributed plasticity approach using StandardIntegration option. Here, the nonlinear response is not limited over the finite plastic length.
With the Standard Integration method I can consider plastic hinges with finite length at the ends of beam and column elements?
No, you should use hinge option in this case.
:: With best wishes ::
Prabakaran Kesavan

STKO Team
Posts: 3070
Joined: Tue Oct 29, 2019 8:45 am

Re: Analysis did not converge

Post by STKO Team » Mon Apr 29, 2024 8:16 am

Just a side note:
When you use the Hinge integration scheme you can also apply the nonlinear section in the middle. The advantage of using the Hinge integration scheme is to be able to directly input the plastic hinge length.
Instead with the Lobatto scheme you can't.
This is relevant if you are using strain-softening materials (like concrete) as the amount of dissipated energy in force-based elements are related to the size of the gauss points.
It's a long topic to explain here but you can find references online.
We gave a webinar about this topic here (https://asdea.eu/software/university-courses/) OpenSees Support Group

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