COMPARISON OF SYMETRIC BUILDING WITH FIXED BASE AND FLEXIBLE BASE CONTINUUM MODEL IN SAP 2000 V.19.2.1

Conventional building plan chosen are regular or symmetrical building with fixed base. Practically speaking the building rests on soil. There is negligence in considering flexible soil conditions and also nonlinearity while performing analysis Moreover the building to be analyzed considering soil structure interaction and nonlinear analysis needs appropriate software as the model should be a replica of realistic structure. In the present study a 10 storey, 3D building is modelled using SAP 2000 V19.2.1 software. Two models is selected one with fixed base and other with flexible soil base and both models are subjected to linear static analysis and Non linear pushover analysis. The results obtained are compared for fixed and flexible base for both linear and nonlinear analysis. The variation in displacement, base force and time period are observed and shows that symmetric building or regular building with fixed base analyzed by nonlinear analysis is found to be realistic and hope full to provide economically better design in future.