EVALUATION OF THE SEISMIC BEHAVIOR OF BASE-ISOLATED BUILDINGS SUBJECTED TO DIFFERENT TYPES OF GROUND MOTIONS WITH DIFFERENT COMPONENTS

Although, several interesting studies have been conducted on base-isolated structures and base isolation systems under different seismic activities, but the behavior of the base isolation systems and base-isolated buildings under different type of excitations are still questioned. One of the biggest problems facing professionals is to know the behavior of base isolation systems under a different type of earthquakes. The particular goal of this research is to assess the seismic reaction of multi-story base-insulated structures with lead core rubber bearings (LCRBs) and fixed base buildings when exposed to distinct kinds of ground motions with different components. In this direction, the equations of motion of the base-isolated buildings are obtained, and force-deformation behavior of the LCRB is modelled as bilinear in MATLAB. Then, the behavior of the base-isolated buildings is being evaluated for 45 different ground motions, which are categorized into three different groups with regard to the ratio of Peak Ground Acceleration to Peak Ground Velocity (PGA/PGV<1, 1 2). Finally, the results illustrated and compared both in graphs and tables

کلیدواژه ها:

Lead-core rubber bearing (LCRB) ، Probabilistic evaluation ، Base isolated buildings ، Peak ground acceleration (PGA) ، Peak ground velocity (PGV)