ANALYZING THE EFFECTIVENESS OF LEAD RUBBER BEARING BASE ISOLATION IN VERTICALLY IRREGULAR MULTISTORY BUILDING

Abstract

In regions characterized by high seismicity, the structural integrity of multistorey buildings is
paramount. This study delves into the effectiveness of lead rubber bearing (LRB) base isolation as a promising
strategy to enhance the seismic resilience of vertically irregular multistorey building. The investigation
scrutinizes a G+13 vertically irregular multistorey building situated in Zones 3, Zone 4, and Zone 5,
employing meticulous numerical simulations to evaluate parameters including storey displacement, storey
shear, storey drift, and overturning moment. Comparative analyses reveal significantly diminished storey
shear and overturning moment in the LRB-isolated structure, highlighting the system's prowess in attenuating
lateral forces during seismic events. Moreover, substantial reductions in storey drift affirm the system's
efficacy in limiting inter-storey displacements. Diverse patterns in storey displacement distributions
underscore the adaptability of lead rubber bearing isolation to the dynamic characteristics of vertically
irregular structures. In this investigation comparative study in done with fixed base method and Base Isolation
method. This research augments the comprehension of these unique structural forms, providing valuable
insights for engineers in seismically active regions. The observed enhancements in structural performance
advocate for the widespread adoption of lead rubber bearing base isolation as a vital strategy for seismic
resilience in vertically irregular constructions.