Seismosoft | Earthquake Engineering Solutions

I need to perform a pushover on a CBF (composed of cbf frame on the middle, and 2 frames on the sides), so the beams need to be pinned. I tried adding structural nodes with equal coordinates to the end of the beams(where I already had nodes), and change the beam's end points to new ones, and then, with nodal constraints, blocking the displacements between the 2 equivalent nodes(as position).
The problems is that when I apply the force, the beams goes straight through the braced frame, without any constrain. So, I assume that the 2 nodes do not work as a pinned connection.
I also tried this with links, but I encountered the same problems.
I would be very thankful if you might provide some solution.

I have another question: I have applied a pushover analysis to a mrf, and than I have added a brace(to the same frame), as I've describet earlier(pinned with single DOF), and the MRF has both higher rigidity, and higher force at the same displacement. This is not a normal behaviour and I wanted to ask you if you have encountered similar problems.Thanks.

Fortunately I've managed to solve the problems I had. But still, when trying to introduce the preformance criteria for a tensioned brace, I obtained different strain results/ each discretized element.
i hope they will improve the introduction of performance criteria, in order to obtain results according to the real behaviour of material.

quote:Originally posted by adanedhel

Fortunately I've managed to solve the problems I had. But still, when trying to introduce the performance criteria for a tensioned brace, I obtained different strain results/ each discretized element.
i hope they will improve the introduction of performance criteria, in order to obtain results according to the real behaviour of material.

Dear adanedhel,

We are happy to hear that you have found the solution to the difficulties you have previously described. If you could kindly describe the way you have addressed such problems, then this would certainly be of benefit to other users. So, can you do it, please?

With regards to performance criteria issue that you now raise, we are assuming that you have checked and double-checked the model. If this is indeed the case, please do send us (support@seismosoft.com) an as simplified as possible version of it, so that we can check things out.

Many thanks for your collaboration,

Seismosoft Support