What is the fundamental difference between the Accidental torsional moment vs. natural torsional moment in STAAD?
Accidental torsional moments do not need to be considered if the diaphragm is flexible but, what is the natural torsional moment?
Also, how does STAAD handle the inherited torsional moment effects? is it being taken care of into the stiffness matrix itself where loads are being distributed?
Thank You in advance