ETABS Semirigid Diaphragm No Axial Loads on Braced Frame Beams

[justanormalguy]

Hello All,


I am new to Etabs coming from RAM SS and am modeling a building laterally supported by braced frames. I have modeled the diaphragm as semi rigid but the beams on the braced frames are seeing zero axial force. I have tried to assign a semirigid diaphragm to the deck, also by going to assign/joint/diaphragms and nothing really changes.. Has anyone had this issue before?

Thanks!

 

[Trenno]

What have you modelled the slab as? Shell or membrane?

 

[justanormalguy]

I have modeled the deck as a membrane/deck.

 

[Trenno]

Try modelling it as a normal slab shell with reduced bending stiffness.