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中文摘要：
连梁是联肢剪力墙结构中重要的耗能构件．传统的钢筋混凝土连梁破坏后修复或更换非常困难，代价昂贵．近年来，国内外学者提出了可更换连梁的概念，即在连梁的跨中设置一个耗能构件，称之为保险丝，通过保险丝的塑性变形耗散能量，而且在地震后对连梁的保险丝部分进行更换比较方便．鉴于连梁的保险丝对连梁的耗能有着决定性的作用，提出了3种不同类型的连梁保险丝，通过低周反复加载试验对这3种保险丝的抗震性能进行了全面研究，比较了3种保险丝的滞回性能、强度和刚度退化性能、耗能能力和疲劳性能．研究表明，3种保险丝各有优势，综合考虑保险丝2的抗震性能最优，并对保险丝1和3提出了相应的设计改进建议．
英文摘要：
The coupling beams are important members of dissipating seismic energy in coupled shear wall structures. However, the traditional coupling beams are difficult to repair or replace in post-earthquake events. Hence, over the past few years, the concept to provide a fuse in a coupling beam has been developed and investigated. The fuse is used to dissipate seismic energy, which is easy to be replaced. Because the fuse plays an important role in energy dissipation, the writers develop three kinds of fuse. The seismic behavior of these fuses is investigated through low cyclic reversal tests in terms of the failure mechanism, hysteretic response, strength degradation, stiffness degradation, energy dissipation characteristics, and fatigue properties. Research results show these fuses have their own advantages. However, Fuse 2 has optimal seismic performance through comprehensive evaluation. In addition, the design recommendations of Fuse 1 and 3 are also proposed.
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