Base isolation of multi-storied building using lead rubber bearing

Abstract

Earthquake resistance building design is the most important thing to ensure safety and minimize loss in recent years. Nowadays, many techniques are being used in earthquake resistance building design. Base-isolation is one of the best techniques used in earthquake resistant design building in economical. It reduces seismic energy transmitted to buildings, in highly seismic prone areas. Lead Rubber Bearings are the most widely used technology in seismic base isolation, because of its technical and economic effectiveness and reliability. In this research, a multi-storied building that is located in Dhaka city is performed at numerically design as a base isolation building where the lead rubber bearing is designed and used as isolator. The building is analyzed for El Centro earthquake data of 15, 20, and 25 second. For base isolated and non-isolated condition nonlinear time history analysis is done using SAP2000 18. By comparing displacement vs time, acceleration vs time graphs for base isolated and non-isolated condition, the displacement difference between top and bottom floor is almost close that indicates this building structural behavior better during lateral load.