SEISMIC PERFORMANCE INVESTIGATION OF BASE ISOLATION SYSTEM FOR TYPICAL RESIDENTIAL BUILDING IN BANGLADESH
Abstract
Base isolation system for building structure is a popular technique to release extensive energy by allowing displacement and
hence to protect structures from earthquake excitation. This paper aims to investigate the performance of a base isolated
building against seismic hazard compare to typical fixed base building using ETABS 2015. Commonly used isolator like rubber
bearing and friction pendulum bearing are used at the base of the building. Parametric studies are conducted to study linear
time history analysis and to investigate the performance of different type of isolator. In the parametric study, comparisons are
made among fixed base, rubber and friction pendulum isolated based structure on the basis of base shear, story drift,
displacement, acceleration and time period. Finally nonlinear static pushover analysis has also been conducted as per
FEMA-440. It is observed from the study that a base isolation system in building significantly reduces base shear with the
increment of displacement and time period compared to fix based building significantly.
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