Buckling-Restrained Braces ( BRB ) Modelling

02-Getting started with the modelling
Mina Rizkalla
Posts: 10
Joined: 27 Jul 2019, 16:18

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by Mina Rizkalla »

When I model a retrofitted (RC) frame with BRB/s, I could get the global response hysteretic results (force vs displacement) for the whole time history/target displacements I enter, on the other hand, I could not get the whole hysteretic results for the truss element (BRB).
so how can I review the whole truss element (BRB) results ?
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z.gronti
Posts: 648
Joined: 16 Oct 2013, 08:14

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by z.gronti »

Dear Mina Rizkalla,

You may find the truss elements' results in the "Truss Forces and Deformations" tab of the "Element Actions Effects" in the post-processor.
Zoi Gronti
Seismosoft Srl.
psi_14
Posts: 21
Joined: 08 Sep 2020, 17:28

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by psi_14 »

Hello,

I am having the same problem reported in this thread. I modelled a concrete structure with a truss (the truss is modelled like a truss element class) and when I run the pushover analysis it says "Axis Maximum Value must be >= Minimum" and no result is shown.

If I uncheck the target displacement box it runs the analysis. The problem is that I need to see the displacement and the capacity curve so I can see the elements that fail for the limit state SD.

How can I solve this?

Best regards
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seismosoft
Posts: 956
Joined: 06 Jul 2007, 04:55

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by seismosoft »

Please make sure that the direction of the forces and phases of pushover analysis is the same with the Control Direction in the target dispacement module. If this does not fix the problem, please send the model to support@seismosoft.com.

Seismosoft Support.
psi_14
Posts: 21
Joined: 08 Sep 2020, 17:28

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by psi_14 »

I sent the model.

Everything is in the same direction, I don't know if it's a bug or something with my model.
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seismosoft
Posts: 956
Joined: 06 Jul 2007, 04:55

Re: Buckling-Restrained Braces ( BRB ) Modelling

Post by seismosoft »

We checked your model. The eigensolver does not give any solutions, it seems that there is one unconnected part in your model.
This is what is giving the problem.
Seismosoft Support
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