Instability in rigid link nodes

[Wendy_smith]

Hello,

I have placed rigid links in my model. I have W10x33 beams resting on top of W24 girder beams. The W10's are bolted to the top flange of the W24's. I placed a rigid link between the nodes for the bolt. When I run the calculation for just dead load, I have instabilities in the nodes on the W10's for the rigid link. Iam not sure what I am doing wrong. I have attached my model and a screenshot. Any help would be greatly appreciated.

 

[Simau]

@HoshangMustafa 

Message 17 and 20 were updated

[HoshangMustafa]

Hi @Simau 

Thanks. Mind that we're talking about steel structure, and the bolts are on hot rolled sections, not on plates. If the plate in your last post is removed, how the rigid link modeling can be done for post 14 of this thread?

[Simau]

@HoshangMustafa 

It's not possible directly using rigid link, look at message 17