Behaviour of Building under Earthquake with or without Base Isolation by Varying Thickness of LRB

A base-isolated building may sometimes show signs of an undesirable large response to long- duration, long-period earthquake ground motion and an connected building system without base- isolation may show a large response to a near-fault earthquake ground action. The setting up of base isolation in building at base level significantly increases the time period of the structure, this means it reduces the possibility of resonance of the structure giving rise to better seismic Performance of the building. The study is performed to compare the effectiveness of base Isolation in plan unbalanced and vertical multi-storied RC frame building. For this study, no of Storied R.C frame building is well thought-out and time times gone by analysis is conceded out using ETABS Software. The lead rubber bearing is designed as per code and the same was used for psychotherapy of base isolation system. The results obtained from the analysis were time period, base reaction, Story drift and story acceleration. Time period for the base isolated structures are elevated than that of the permanent base structure. Due to the presence of base isolation, base shear is significantly Reduced in each direction (x and y direction) as compared to fixed base building. It has been found that when compared to plan base isolated building gives better performance in high Seismic prone area by using isolators at the base of the building.