Study On Seismic Behavior Of Buckling Restrained Braced Based On Frame Structure

In the elastic stage, the common brace frame construction boasts large stiffness, but low ductility and energy consumption ability. Under the influence of earthquake and wind load, the brace may easily be buckled under the pressure, making the construction lose the bearing capacity. Buckling restrained brace, or BRB, overcomes the shortcomings of the traditional brace. In this paper, through the using of the BRB in frame structure to conduct a study.Firstly, the production, development and application of BRB is clarified in this paper, besides, stable analysis and construction design are used for BRB in terms of theory and trail. On this basis, the principle of energy dissipation and seismic reduction of buckling-restrained braced frame is deducted to expound through the theory, and the analysis methods for strcture in different elastic-plastic stages is presented.Secondly, the time history analysis method of SAP2000 is used for the common brace frame and BRB frame, and the seismic performance of the two frameworks are compared in frequent earthquake and rare earthquake, coming to the conclusion that the employment of BRB in the frame construction can not only increase the stiffness of the frame, but also better improves the ductility of the frame. The brace will be buckled firstly in the rarely seen earthquakes, thus protecting the major structure from being destroyed and improving the anti-seismic behavior of the whole construction.Finally, the seismic performance of buckling restrained brace is applied to seismic strengthening combined with the engineering, coming to the conclusion that the BRB can be used for different seismic intensity and seismic requiremented structure, it contains a wide prospect.