Multi-Index Seismic Capacity Evaluation of Buckling-Restrained Braced Frames

다국어 초록 (Multilingual Abstract)

The seismic capacity of a structure is determined by the performance index that reaches its ultimate bearing or deformation capacity fi rst. This paper presents a multi-index seismic capacity evaluation method for accurately evaluating the seismic capacity of a structure. The normalized response curves of several indices are concurrently plotted to form a multi-index seismic capacity evaluation fi gure, in which the seismic capacity and demand values that correspond to various indices can be determined by vertical and horizontal threshold lines. Based on an incremental dynamic analysis (IDA), a 6-story buckling-restrained braced frame (BRBF) and a series of comparable 6-story steel frames are analyzed using the proposed method to verify the method and investigate the seismic behavior of BRBFs. The results show that the seismic performance of buckling-restrained braces is not the only factor that determines the seismic capacity of BRBFs and indicate that the multiindex seismic capacity evaluation method can eff ectively identify the critical index of a structure and the weakest links that restrict the structural seismic capacity.

참고문헌 (Reference)

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