Assessment of Location of Centre of Mass and Centre of Rigidity for Different Setback Buildings

Abstract

Buildings are mainly classified into regular and irregular buildings. Nowadays due to our requirements and aesthetic point of view, we are making the buildings more irregular than regular. An irregular building is as a building that lacks symmetry and has a discontinuity in geometry (setback), mass or load resisting elements. The presence of structural irregularities has an adverse effect on the seismic response of the structure. The structural irregularity can be broadly classified as plan irregularities and vertical irregularities. In this present study, the effect of vertical irregularity on seismic response of a structure is studied. In particular, a setback in buildings are considered and behavior of the structure with respect to the location of the center of mass and center of rigidity is assessed using pushover analysis. The analysis tool used to assess the building is ETABS 2015.