【摘要】 为研究新型全预制装配式混凝土楼盖板缝连接节点的抗震性能,设计了5种形式的板缝节点,进行了平面内低周反复荷载下的足尺模型试验,对板缝节点的开裂模式、破坏形态、滞回曲线、位移延性、刚度退化和耗能能力进行了较为系统的研究。结果表明:在5种板缝节点中,发卡式节点、盖板式节点和发卡-盖板混合式节点滞回曲线饱满、延性好,具有较好的抗震性能,是理想的板缝连接节点;上下匹配布置预埋机械连接件的板缝节点平面内受剪承载力可以由叠加法进行简化计算。更多还原

【Abstract】 An experimental program consisting of prototype tests of selected slab connections was conducted to evaluate the seismic behavior of the proposed slab connections used in new-type precast concrete floor diaphragms.Performance of the test specimens was evaluated in terms of crack and failure mode,hysteretic curves,ductility,stiffness degradation and energy dissipation capacity,etc.The test results reveal that the hysteretic curves of hairpin connection(HPC),cover plate connection(CPC) and hybrid connection combined with hairpin connector and cover plate connector(HP-CPC) are plump and show good energy dissipation and seismic performance.The in-plane shear bearing capacity of the new-type connection consisting of coupled mechanical connectors in both side of the slab can be predicted in a simple superposition method.更多还原