In this paper,a concrete frame structure is reinforced by installing Buckling Restrained Brace( BRB). The structure responses before and after reinforcement were analyzed under multi and rare earthquake by combination of finite element software ANSYS and MIDAS. The results show that,displacement angles between each two neighboring layers of the structure meet the standard under multi and rare earthquake,and the emergence of the plastic hinge is effectively reduced to ensure the overall safety of the structure.%使用防屈曲耗能支撑（ BRB）对某混凝土框架结构进行了加固，并通过ANSYS与MIDAS两种有限元软件，对加固前后的结构进行了多遇、罕遇地震作用下的结构响应仿真分析，结果表明：多遇、罕遇地震下，加固后结构层间位移角均满足规范要求，有效减弱主要构件塑性铰的出现，保证了结构整体安全性。
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