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论文类型：期刊论文

发表时间：2014-10-10

发表刊物：STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS

收录刊物：SCIE、EI、Scopus

卷号：23

期号：14

页面范围：1064-1082

ISSN号：1541-7794

关键字：unbuckling brace; energy dissipation; quasi-static test; shaking table test; seismic performance; conventional central brace

摘要：The unbuckling brace, acting as a combination of a conventional brace and displacement-dependent damper, can successfully avoid the bucking and consequent fracture compared with the conventional brace, which has been widely applied in concentrically braced frame structures. In this paper, the H-type steel unbuckling brace ( SUB), which is welded by steel flats and core made of low-yield steel, is presented. The quasi-static tests, the shaking table tests of a steel structure with SUBs and conventional central braces and the numerical analysis of a real steel building with and without SUBs are conducted in this study to evaluate the performance of SUBs. The results demonstrate that the SUBs have excellent plastic deformation capacity, stable energy dissipation capacity and no stiffness degradation, and can provide certain initial stiffness to the structure and dissipate earthquake input energy by yielding behaviour. Moreover, it is effective in reducing the structural response, and in particular, in controlling the structural displacement. In conclusion, the SUB proposed is a lateral resistant member with high stiffness and strength and an excellent energy dissipation device, which is much more competitive than the conventional brace in improving lateral resistance and seismic performance of the frame structure. Copyright (C) 2013 John Wiley & Sons, Ltd.