Analysis of High Rise Building with Dual Systems

Abstract

The dangerous natural hazards earthquake is the one which, cause great damage of the building and livelihood as well. The ground motion and structure behavior itself are the characters on which response of the structure depends during earthquake. In medium to high rise structures situated in earthquake prone area coupled shear walls are one of the systems commonly used to resist lateral forces. ETAB stands for extended version three dimensional analysis of building. Commonly Skyscrapers, parking garages, steel and concrete structures, high rise structures, portal frame structures with coupled shear wall are modelled using ETAB software. The study in this paper mainly emphasizes on structural behaviour of multi-storey building of regular shape with combination of coupled shear wall and bracings. Lateral load analysis for the following type of structures such as regular model, mass reduction model and soft storey models with coupled shear wall is done. Different storey height such a s 30, 40 and 50 storey heights is considered. The above analysis is done using ETABS. Parameters such as axial force, shear force, bending moment and seismic response of regular model, soft storey model, mass reduction model, V bracing model and X bracing model for 30, 40 and 50 storey structures are studied. Axial force increase with increase in storey height. Soft storey and mass reduction models possess less axial force compared to regular model. Regular model is stiffer than other two models. V bracing model were effective in reducing the bending moment and axial forces in columns. Storey displacementswere within permissible limits.