Design of Base Isolated School Building with Elastomeric Bearing

In this paper, a school building which is to be located in Coimbatore region is taken. A four storied (G+3) school building having plan dimension of 16m x 54m is considered. The structure is modeled as single degree of freedom. The analysis of the structure is made by linear dynamic response spectrum method and the dynamic responses are found. From linear response spectrum analysis used in this study, the total base shear forces and storey shear forces in the columns and the absolute and relative storey drifts are found and the column having critical value is found judicially. Elastomeric bearing is designed for that column. The aim of this study is to obtain dynamic characteristics which are natural frequencies and mode shape of the structure using modal analysis and to carry out analytical modal analysis of the structure. Response spectrum analysis is carried out. Design procedures used for base isolated systems are discussed and form the basis for preliminary design procedures.