Part 1 - Problem 08: Since the buildings diaphragms should be flexible and have zero stiffness, should we ignore torsional properties of the building or how should we account for this instead?

Question

Part 1 - Problem 08:  Since the buildings diaphragms should be flexible and have zero stiffness, should we ignore torsional properties of the building or how should we account for this instead?

Accepted Answer

Torsion should still be considered regardless of how diaphragms are defined. Torsion will likely appear in your mode shapes and it would be advantageous to attempt to
minimize torsion in your design.