Hi,
In my multi level steel Structure I'm experiencing more axial loads when I define Floor diaphragm with temperature loads as there are Precast concrete slab are there on my floors. If I'm ignoring Floor diaphragm action on floors, displacement was not in control. Due to temperature loads its getting high axial forces and additional when I'm defining floor diaphragm the forces are huge.
Am i doing anything wrong ? or will it be same when i apply both ?
How to control the axial forces ?
Can anyone please help me in this.
It is expected that rigid diaphragm leads to higher axial forces due to temperature load in the beams. As rigid diaphragm is applied to the nodes, the restraints on the nodes are created which are no allowing a linear expansion of the member due to temperature load and this leads to axial forces. A nice explanation on this topic is provided by Biswa here: AXIAL LOAD DUE TO TEMPERATURE - RAM | STAAD Forum - RAM | STAAD - Bentley Communities