Study of seismic analysis of asymmetric building with different shapes of staggered openings and without openings in Shear Wall

Abstract

Shear walls are structural members that are usually used in high-rise buildings to resist lateral forces such as wind and seismic. Several studies suggest that shear walls perform better without any openings, however in situations such as provision of openings for ventilation and mechanical movement for lifts, it is mandatory to give openings in shear walls. Evaluation of seismic responses of shear walls is vital to check for stability and integrity of structures from external loads. This comparative study focuses on the effectiveness of various shapes of vertical staggered openings in an asymmetrical building under the effect of earthquake loads with the help of ETABS software. 10 storey asymmetric building is analyzed by response spectrum method to compare the parameters such as displacement, storey drift, storey shear, storey stiffness, base shear between different shapes of staggered openings such as square, rectangular and triangular compared to the same model with uniform openings and without openings in shear wall. This paper also further explains the failure pattern between staggered and uniform openings in shear walls. Furthermore, the model is also analyzed with rectangular openings aligned along the center line of shear wall to understand the effectiveness of placement too. There is very little study on the effectiveness of different shapes of staggered openings in an asymmetric building. The main aim of this paper is as follows: to understand the advantages of staggered openings over uniform openings and to analyze effectiveness of staggered openings to seismic load when different shapes of openings are used.