RESPONSE ANALYSIS OF PLUS SHAPED TALL BUILDING WITH DIFFERENT BRACING SYSTEMS UNDER WIND LOAD

This paper aims at response study and analysis of plus shaped tall building with different orientations of bracing systems under wind loads. The effect of wind load on building becomes very critical with increase in height of tall buildings. As not much encouraging information is available in the standard codes of practice regarding tall buildings with irregular plans and cross-sectional shapes, hence, more research needs to be done in the given area. With the same objective, the present study focuses on a different plan i.e. plus shaped tall building exposed to 0o , 30o and 60o angles of attack of wind. Isolated condition (without bracing system), V bracing, Cross bracing, Single Diagonal bracing and Inverted V bracing system have been considered to analyse the effectiveness of various bracing systems as structural system against wind loads in tall buildings. Bentley STAAD Pro software v8i module was used to carry out response study. Prototype buildings are presumed to be constituted of RCC beams and columns. The prototype building was designed as G+35 with 4.5 m ground floor height and 3.3 m remaining floors' height. Mean response of prototype building at windward position and leeward position for 0o , 30o and 60o wind incidence angles including base shear (Fx), moment about y axis (My), twisting moment (Mz) and deflection in x direction has been obtained to study the outcome under wind loads of plus shape and different bracing systems.