Talha Rasul

When I give a modifier for 0.01 to beams it means its is providing zero stiffness against torsion then these forces are transferred to which members?. Moreover in practical structures how torsion could be avoided in beams ( reinforcement detailing could do that .. ?) . Furthermore when a stiffness modifier of 0.35 is given to beams the same beams fails and needs a bigger section. So all this could not conclude that assigning zero stiffness against torsion in beams means that no torsional forces will occur in real structure.

I am attaching the modal participation of mass of building first mode and second mode time period is quite apart that is good but first mode seems to be torsional help me out if ETabs modal results are placed as first torsion then followed by x and y . I want to interpret the results if these are good that I can lock my structure and go into designing? Moreover these are my center of mass and rigidity they are also 7 to 8% apart so I want to know if my building first mode is torsion.? Thanks