Pinned-Pinned realese

[Michele100100]

Hello all,

It is correct assume In the pinned-pinned realese Rx blocked at both ends?

So bar cannot rotate on X-axes and avoid instability?

Thanks

[Rafacascudo]

No , the default pinned-pinned release blocks rx only in one of the bar ends

[Michele100100]

Hello, 

thanks for your fast reply. 

But If I leave as default, this is what happened to my calculation:

Instability at n.38 node and error 3060. On the lower falange of the beams where node 38 is located, I have a metal deck with concrete slab on top, Could I assume blocked rotation Rx at both ends?

Thanks if you could help.

[Rafacascudo]

Could you please send your model?

Zip it before attaching.

But of course , you can test it without rx releases on both sides and see if the structure still behaves properly

[Michele100100]

attached the model

[Michele100100]

the problem is the Moment on the columns, when is blocked at both ends the rotation RX...

see:

https://forums.autodesk.com/t5/robot-structural-analysis-forum/moment-diagram/td-p/11375880 

Thanks