Efficiency of Different Type of Bracing System for Wind Analysis of Multi-Storied Steel Frame Structure

When a tall building is subjected to lateral or torsional deflections under the action of fluctuating wind loads, the resulting oscillatory movement can induce a wide range of responses in the building’s occupants from mild discomfort to acute nausea. As a result, lateral stiffness is a major consideration in the design of tall buildings. Bracing is a highly efficient and economical method of resisting lateral forces in a frame structure because the diagonals work in axial stress and therefore call for minimum member sizes in providing the stiffness and strength against horizontal shear. In this research study, three different types of bracing systems will be investigate with eighteen storey having various types of configuration in same structure for the use in tall building, in order to provide lateral stiffness and finally the optimized design in terms of lesser structural weight, lesser lateral displacement, axial force, shear force and bending moment will be exposed. For this purpose a eighteen storey regular shaped steel structure building will selected with plan dimension 45mX15m and will be analyzed for wind and gravity load combinations along both major and minor axes. The property of the section is used as per IS 800:2007 which incorporates Limit State Design philosophy. Wind load is considered with reference to IS875:1987 (part III). Commercial software package STAAD. Pro V8i is used for the analysis of steel buildings.