Evaluation of Lead Rubber Base Isolation in High Rise Structure

Seismic isolation also known as base isolation is one of the best earthquake resistant design concept in which a building is decoupled from the earthquake ground motion or seismic waves. In base isolation the base of the structure is isolated using isolators which help in decoupling. This study will therefore evaluate the performance of High-Rise structure with Lead Rubber Bearing as an Isolation System for different structures using seismic and wind analysis with focus on determining the effect of soft storeys within structures on variables such as storey displacement, storey drift, storey stiffness and time period. The objective of the research is to provide optimum position for isolation. However, there have only been a few studies on the impact of soft storeys at various levels in tall structures. This study will therefore investigate the impact of soft storey level variation in 25 storey building with and without LRB isolated structures.