| Through the external constraint unit suppresses the internal core buckling instability in the axialload buckling-restrained braces(BRB) not only play the role of general brace, but also cansignificantly improve the ductility and seismic capacity of the buckling-restrained brace frame(BRBF) structure because of its hysteresis curve is full. The BRB is BRBF structures earthquakeresistant systems first line of defense. In this paper, the key theoretical problem on the componentdesign based on the working principle of BRB was discussed in detail, the influence of relatedparameters was studied through the numerical simulation, and the design method of BRB wassummarized and perfected; In view of China's steel market, GB Q235angle was selected as kernelcore of BRB, six supporting specimen were designed and produced to verify the correctness of itsenergy dissipation properties and related theories through low cycle loading tests; A design methodbased on energy was proposed through the theoretical analysis and the simulation study on theBRBF structure system. |
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