SEISMIC LOAD ANALYSIS AND WIND LOAD ANALYSIS OF 25 STOREY BUILDING IN DIFFERENT SEISMIC ZONES AND VARIOUS WIND TERRAIN CATEGORIES

Abstract

Due to decrease of available free land and due to wide spread urban area, the architects and the engineers have started developing cities vertically. Recently, the dia grid structural system has been widely used for tall buildings due to structural efficiency and aesthetic potential provided by triangulation of the system. Compared to the conventional frame buildings having exterior vertical column, dia grid structure resists the lateral loads more efficiently due to presence of inclined columns. In dia grid system the lateral loads are resisted by the axial action of the inclined columns that are placed at the exterior periphery of the buildings. Compared to closely spaced vertical columns in framed tube, dia grid structure consists of inclined columns on the exterior surface of building. Due to inclined columns lateral loads are resisted by axial action of the diagonal compared to bending of vertical columns in framed tube structure.
In the present study a 25 stories building is analyzed by using ETABS software by using dia grids in different seismic zones and for different wind terrain categories. The results like story drift, story shear, story bending, time period, model stiffness are compared with bare frame building model.