Behavior of Symmetric Frame Structure with Base Isolator and Fixed Base Building

Abstract

In this study, Non-linear time history analysis of 2 building modals have been carried out with using of lead rubber bearing and fixed based modal of G+6 and G+14 story symmetrical RC frame building.  Passive vibration control keeps the buildings remain elastic during large earthquake and higher wind. SAP 2000 v18.2.0 software is used for analysis the structural model. The result of Acceleration, Displacement and Velocity is compared with the fixed based structural model and result of modal period and natural frequency.  A better performance of the isolated structure with respect to the fixed base structure is also observed in roof floor displacements, floor acceleration relative to the ground. Introduction of horizontal flexibility at the base helps in proper energy dissipation at the base level thus reducing the seismic demand of the super structure to be considered during design. It is found that there is major difference between the results of base isolated and framed structure. The results of base isolated structure have performed better compare to the fixed base structural modal.