SEISMIC ANALYSIS OF BASE ISOLATED BUILDING UNDER NEAR FIELD AND FAR FIELD EARTHQUAKE

Abstract

A comprehensive seismic study of a base-isolated structure susceptible to both near-field and far-field seismic situations has been provided in this work. The focus of the study is to determine how well base isolation methods work to improve a structure's seismic resiliency and reduce its response in various seismic conditions. Using complex computational techniques, an ordinary structure with a base isolation system is analyzed, considering realistic material attributes, geometrical designs, and boundary situations. Gathering and analyzing ground motion data that represents near-field and far-field seismic conditions allows us to replicate the dynamic excitations that a structure could face. The structural reaction, which includes accelerations, displacements, inter-storey drifts, and floor response spectra, is assessed using nonlinear dynamic analysis. Across near-field and far-field earthquakes, the efficacy of the base isolation system in lowering transmission loads and displacements is determined and compared. Studies additionally take place regarding the comfort and safety of the structure's citizens, as well as the impact of important factors including structural features and isolator qualities. The purpose of the study is to improve design techniques and the resilience of structures in earthquake-prone areas by offering analytical data regarding the seismic response of base-isolated buildings under various seismic conditions. In this research work prepare four different cases in ETABS. Base isolation devices are typically installed between a building's foundation and superstructure. They serve as a flexible interface, depending, in the case of a seismic event, on the structure's ability to move regardless of its position on the ground itself.