Base isolation (BI) system for buildings is introduced to decouple the building structure from potentially damaging induced by earthquake motion, preventing the building superstructures from absorbing the earthquake energy. The mechanism of the base isolator increases the natural period of the overall structure, and decreases its acceleration response to earthquake / seismic motion. A steel building with structural rubber bearing is introduced throughout this study. The study analysis performed to check for the adequacy of the base isolation against building lateral drift and inter-story drift as per allowance in National Building Code of Canada 2010. Two buildings were analyzed using the nonlinear time history response analysis using the dynamic MODAL analysis for fixed base (FB) building, and Isolated base (IB) building with rubber bearing. The analysis represents a case study for symmetric steel building to show the ultimate capacity of the selected structural bearing, and to make a comparison for the difference between the isolated base and the fixed base buildings. Initial results show that the presence of the structural rubber bearing reduces significantly the vertical displacement, moment and shear generated for the same mode.
Keywords: building, base isolation, rubber bearing, earthquake, dynamics, time history response
Citation:
Sayed-ahmed, Mahmoud. Building with Base Isolation Techniques. Journal of Al-Azhar University Engineering Sector (JAUES), Vol. 7, No. 1, Dec. 2012, pp. 147-159.
Citation:
Sayed-Ahmed, M. 2012. Building with Base Isolation Techniques, Course Project Report. Ryerson University, Toronto, Canada.
