Seismic Performance of Setback Building Stiffened with Reinforced Concrete Shear Walls

Abstract

Structural irregularity is common now-a-days. Architectural demand is the cause for such irregularities. A common type of vertical geometrical irregularity in building structures is the presence of setbacks; usually called as setback buildings. The buildings with vertical setback cause sudden jump in earthquake forces at the level of discontinuity. The general solution of a setback problem is the total seismic separation of setback part from remaining portion of the building. The performance of such buildings under seismic forces can be improved by providing lateral load resisting elements such as shear walls. In this paper, seismic performance of tower type setback buildings has been evaluated. These setback buildings are stiffened with shear walls and non-linear static pushover analysis is carried out. Performance and hinge formation pattern of the tower type setback buildings and the buildings stiffened with shear walls are studied and compared in this paper.