According to application notes by AISC, for Direct Analysis Method the UNREDUCED STIFFNESS shall be used for service checks. Now, due to limitations by Staad for DAM (for instance, not TENSION MEMBER available), I proceed to: 1. Reduce module of elasticity…

My understanding is that with the PDITER command with every PDelta Iteration the Taub values for Direct analysis is computed and the iteration stops when Taub converges. In which case I cannot understand the purpose of the ITERDIRECT command. Could…