期刊名称：Iranica Journal of Energy and Environment (IJEE)
印刷版ISSN：2079-2115
电子版ISSN：2079-2123
出版年度：2013
期号：3151
页码：178-185
出版社：Noshirvani University of TEchnology
摘要：Buckling-restrained braced frames (BRBFs) are used as primary lateral load resisting systems forbuildings in high seismic areas. The main characteristics of buckling-restrained braces (BRBs) are enhancedenergy dissipation potential, excellent ductility and nearly symmetrical hysteretic response in tension andcompression. This paper presents an analytical study aimed to assess the feasibility of using BRBs as a retrofitscheme for existing steel frames. For that purpose, the seismic response of four two-dimensional frame modelsrepresentative of typical steel frames was analyzed prior to and after including BRBs as a retrofit strategy.Comprehensive nonlinear static and time-history analysis were carried out for analyzing the frames. A set ofseven code-compliant natural earthquake records was selected and employed to perform nonlinear time-historyanalysis. Frames were analyzed and designed based on 2800 Iranian Seismic Code. The evaluation was basedon comparing seismic displacement demands such as target roof displacements, maximum displacements andinter-storey drifts. The results showed that the effectiveness of braced frames can vary significantly withground motions, frame rises and retrofitting systems. It perceived that the seismic response of frames coincideswell with the given design objectives.
