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BRBF response modification factor
Authors:B Asgarian  HR Shokrgozar
Affiliation:K.N. Toosi University of Technology, Tehran, Iran
Abstract:In this paper, overstrength, ductility and response modification factor of Buckling Restrained Braced frames were evaluated. To do so, buildings with various stories and different bracing configuration including diagonal, split X, chevron (V and Inverted V) bracings were considered. Static pushover analysis, nonlinear incremental dynamic analysis and linear dynamic analysis have been performed using Opensees software. The effects of some parameters influencing response modification factor, including the height of the building and the type of bracing system, were investigated. In this article seismic response modification factor for each of bracing systems has been determined separately and tentative values of 8.35 and 12 has been suggested for ultimate limit state and allowable stress design methods.
Keywords:Response modification factor  Overstrength factor  Ductility factor  Buckling restrained braced frames
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