Concrete02 convergence

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xavio
Posts: 7
Joined: Fri Dec 02, 2011 11:23 am

Concrete02 convergence

Post by xavio » Thu Jan 12, 2012 7:48 am

Hello,

I am modelling a bridge. The columns are forceBeamColumn elements with fiber section. When I use material Concrete02, the analysis fail to converge (failed to get compatible element forces and deformations for element error), but when i use Concrete01, it works. I don't understand how this is possible. I'm pretty sure my material definition is good. Does someone have any ideas? Thank you!
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vesna
Posts: 3033
Joined: Tue May 23, 2006 11:23 am
Location: UC Berkeley

Re: Concrete02 convergence

Post by vesna » Thu Jan 19, 2012 12:52 pm

So far, Concrete02 was extensively used by OpenSees users and I never had anyone with the same problem. Check the definition of your material again.
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xavio
Posts: 7
Joined: Fri Dec 02, 2011 11:23 am

Re: Concrete02 convergence

Post by xavio » Thu Jan 19, 2012 3:09 pm

I found the problem. It was because of a wrong definition of the geomtransf command (bad orientation of self weight). Thank you for your attention.
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parsaparvanehro
Posts: 4
Joined: Sat Mar 12, 2016 4:12 am
Location: ShahidBeheshty University

Re: Concrete02 convergence

Post by parsaparvanehro » Thu Mar 16, 2023 6:18 am

Dear xavio
After 11 years :wink: . Could you please explain it. I faced with similar problem.
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mhscott
Posts: 874
Joined: Tue Jul 06, 2004 3:38 pm
Location: Corvallis, Oregon USA
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Re: Concrete02 convergence

Post by mhscott » Thu Mar 16, 2023 7:29 am

Probably had to do with member loads being defined with respect to local element axes whereas xavio may have assumed the member loads were defined with respect to global axes.
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