Volume :

5

Issue :

1

Abstract :

The present study investigates the seismic behavior of multi storey building retrofitted with damping devices located within the lateral load resisting elements (core wall). The study concentrates on a retrofitting strategy with passive energy dissipation devices known as Fluid Viscous Dampers (FVDs) in diagonal configuration. A 3D model of a twenty seven storey core wall structure is developed in SAP 2000® (commercial software for structural analysis and design). FVDs are provided in cut outs of core wall which are located in three consecutive storeys. The cut out locations are varied depending on their relative positions. Relative position is the ratio of total height of the structure to the upper edge of topmost cutout. Time history and response spectrum analysis were used in the study. Seismic response of the structure in terms of roof deflection and roof acceleration is compared for the structure with and without dampers by varying relative positions of the cutouts. Results indicate that dampers provided at lower cutouts i.e. for higher value of relative position there is a significant reduction in seismic response.