COMPARATIVE ANALYSIS IN ASYMMETRICAL BUILDING WITH TRADITIONAL SHEAR WALL AND WITH STAGGERED SHEAR WALL OPENING

Abstract

Today, constructing building with regular shapes and designs are sometime not practical due to irregular plot dimensions and specific functions and aesthetics requirement in urban areas. Therefore, to overcome these problems, irregular buildings are taken into consideration. However, irregular structures, whether horizontal or vertical, are more prone to damage by wind and earthquake forces, which can lead to casualities, property damage and can also lead to potential collapse. To combat lateral forces, high rise buildings commonly use shear walls – reinforced concrete and masonry wall which are designed to resist in-plane lateral forces, including seismic and wind forces. There are several studies which shows that shear wall performs much better without openings, but in some cases it has been seen that there are requirement of openings in shear wall because of ventilation and mechanical movement of lifts. The comparative study focuses on the horizontal and vertical irregularity with and without staggered shear wall opening under the effect of seismic load using ETABS software. The two models are modelled for with and without staggered shear wall opening for G+15 storey. The structure are modelled for 30 m x 30 m plan having two types of irregularity i.e Horizontal and vertical irregularity, with and without staggered shear wall opening. According to Indian Code (IS:1893-2016), dynamic analysis is to be conducted for building taller than 15 meters and located in Zone IV. Dynamic analysis can be done by either using the response spectrum method or time history method. In this particular study G+15 storey building was modelled and analyzed using the response spectrum method in the ETABS software. A response spectrum is a graph that shows the maximum response (maximum, displacement, velocity, and acceleration) as iv compared to the natural frequency of a single degree of freedom system (SDOF). The main aim of this paper is to compare the result like Displacement, Stiffness, Shear & Drift values and find out which models performs better under the seismic excitation. In the present study vertical geometrical irregular building with staggered shear wall opening has shown better performance than the other building.