Soil-Structure Interaction Effect on seismic response of low- and mid-rise steel moment-resisting frames equipped with Pall friction damper

This research, investigates the behavior of 3, 5, and 8-story steel structures with medium bending steel frames in four cases without considering interaction (A), considering interaction (B), using damper (C), and in Damper usage mode considering soil and structure interaction (D) and the performance of pal dampers, fragility curve, has been discussed under seven acceleration maps of the near-pulse area. The innovation of the research is in the use of a pal friction damper and considering the effect of soil-structure interaction (SSI) to investigate the dynamic and seismic behavior of low and mid-rise intermediate moment steel.Modeling has been done in ETABS software and Incremental Dynamic Analysis (IDA) by LRFD method in Opensees software.Vulnerability levels introduced in HAZUS MH-MR4 have been used to investigate different failure modes of the models. The studied frames with dampers have been subjected to nonlinear analysis in three damping levels 5%, 10%, and 15%. The obtained results showed that: for the state (B) in short structures, the order of displacement of floors remained almost constant and had no difference compared to state (A); But in case (C) it caused a decrease in the movement of floors and on the other hand in case (D) the movement of floors has been relatively reduced; And the pattern of displacement reduction in different records is different.Also use of a damper has no effect on the amount of base shear of structures, but the amount of base shear has decreased in structures with more floors.