Thanks for your reply.
I did perform 3D analysis with accidental torsion considered and every thing looks 'fine'. The drift is not much so the column should be able to resist this drift. However, this is linear analysis only, with non-linear the drift will increase a lot more. And I believe this...
Thank you for your help.
The code doesn't prohibit the use of flat slab.
In fact it doesn't require the first mode not being in torsion as well. The only thing regarding irregularity is to consider 10% accident torsion.
I have also seen structure like this everywhere here but personally I want...
I am looking for opinions from fellows here in regards to seismic design especially torsional effect.
Say I have a floor plan as below. Two stories (all flat slab) only and in low seismic zone (but I still want to enhance the its seismic performance as much as I can)
1. What will you do to...
