Seismic Performance of Steel Framed Building With Mass Irregularities With The Use of Different Combinations of Base Isolators and Dampers

Abstract

This study addresses the nonlinear seismic responses of 3D Steel frame building upgraded with a series of passive protective systems. To this, friction damper (FD) as an energy dissipation device and lead rubber bearing (LRB), and friction pendulum bearing (FPB) base isolators are considering. For this purpose, eight different cases are taken into account. The first case contains a ten-story steel frame regular compare with irregular buildings (mass irregularities) as fixed-base (FB), the other four cases are the single use of FD, LRB and FPB in such frame, and the last three cases are the combined use of FD with LRB and FPB, Combination of isolators LRB and FPB, Combination of LRB, FPB and FD. Above same cases are considering for fifteen story steel frame regular buildings compare with irregular buildings (mass irregularities). Two ground motion records considering in this study by non-linear time history analysis in ETABS.