Design of Base Isolation System for a Six Storey Reinforced Concrete Building

Abstract

The aim of the seismic design is to protect the important building such as museums, hospitals, official buildings etc.., and reduce the damages after a seismic event. Many researchers have done a lot of research to get the best solutions to resist earthquakes and protect survival. One of those solutions is base isolation, the main goal of seismic isolation is to shift the fundamental frequency of a structure away from the dominant frequencies of earthquake ground motion and the fundamental frequency of the fixed base-superstructure, the other purpose of an isolation system is to provide an additional means of energy dissipation, thereby reducing the transmitted acceleration into the superstructure. In the present study, a six-story RCC building has been designed and analyzed according to IS Code for seismic analysis by (STAAD PRO V8i) software using response spectrum analysis, the study considered two models one of the models represents conventional building and the second model represents base isolation (BI) building. The results obtained shows the reduction in base shear and storey drift in both direction and increase in the displacement and the time period for the base isolated structure. Finally, parameters such as storey displacement, storey drift, mode and base shear are compared and obtained result where presented by both graphically and in tabular format.