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该文通过6榀1/3缩尺的两层单跨梁柱四角钢连接钢框架内填钢筋混凝土剪力墙结构(简称PSRCW)试件模型的低周反复荷载试验,研究了PSRCW结构的传力机理及破坏模式,分析了PSRCW结构的滞回性能、刚度退化、变形及延性性能、耗能能力以及内力分配关系等。研究结果表明:PSRCW结构具有较高的承载力和较大的抗侧移刚度,耗能能力一般。设计荷载水平,与钢梁相连抗剪连接件分担约80%的水平剪力,钢框架分担约70%倾覆力矩。抗剪连接件在拉剪耦合受力状态下易发生低周疲劳破坏,改善抗剪连接件的性能是提高PSRCW结构延性的关键。
In this paper, the low-cycle cyclic loading test of 6 榀 1/3 scale steel truss-framed reinforced concrete shear wall structure (PSRCW) Force mechanism and failure mode, the hysteretic behavior, stiffness degradation, deformation and ductility, energy dissipation and internal force distribution of PSRCW structure are analyzed. The results show that: PSRCW structure has higher bearing capacity and greater resistance to lateral displacement stiffness, energy dissipation capacity in general. The design load level, connected to the steel beam shear connectors share about 80% of horizontal shear, steel frame share about 70% overturning moment. The shear connectors are prone to low-cycle fatigue failure under the tension-shear coupling stress. Improving the performance of shear connectors is the key to improve ductility of PSRCW.