Abstract
Some steel materials for pipes exhibit cyclic hardening behavior under cyclic loads. This behavior leads to higher stiffness and resonant frequencies of piping systems. It is important to consider these effects in order to predict seismic responses of piping systems. We studied modeling procedure of piping material to simulate such inelastic behavior. The procedure flow was illustrated to suggest appropriate stress-strain relationship and hardening rule. Material models in the flow were applied to the simulation of the seismic test of piping system made of stainless steel. These results were compared with the test result, and the applicability of each model was discussed.
