Modelling of Bracing Systems for Seismic Behaviour of High Rise Steel Building

Abstract

This study mainly emphasised on compare the seismic behaviour of high-rise steel building with different types of bracing systems. Non-linear static analysis were performed to observe the structural performance on high rise steel building of heights 10,15,20,25,30 and 35 storeys. For this study, four types bracing systems were used: V-Braced frames (VBF), Chevron Braced frames (CBF), X-Braced frames and Self-centring energy dissipating braced frames (SCEDBF). The performance of different types of bracing system has been evaluated by changing the parameters like height of building and different types of lateral load pattern. It has been observed that different braced frames performed well in terms of storey displacement, inter-storey drift ratio, base shear capacity and performance point when compared with moment resisting frame in high-rise steel buildings. It has been observed that VBF and CBF performed similar manner under seismic event and XBF and SCEDBF performed similar manner. It can be concluded that, based on obtained results, that the use of VBF, CBF, XBF and SCEDBF enhances the seismic performance of overall structure.