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内置型钢的装配式RC梁柱节点抗震性能研究

Research on Seismic Performance of Prefabricated RC Beam-Column Joints with Embedded Steel Sections

  • 摘要: 梁柱节点连接性能是影响装配式建筑结构抗震性能的关键因素,为满足抗震性能要求的同时实现高效施工,提出了一种内置型钢连接的装配式钢筋混凝土梁柱节点连接形式,并制作了1个足尺预制边节点试件和1个足尺现浇边节点试件进行对照组的拟静力试验研究。试验结果表明:该节点的破坏模式为梁端塑性铰破坏,荷载−位移曲线较为饱满,具有较好的延性及耗能能力,节点核心区不发生剪切破坏,满足“强节点弱构件”的设计目标。

     

    Abstract: The connection form of beam-column joints is a key factor influencing the seismic performance of prefabricated building structures. To simultaneously meet seismic performance requirements and enable efficient construction, this paper proposes a novel connection form for prefabricated reinforced concrete beam-column joints with embedded steel sections. A full-scale precast edge-joint specimen and a corresponding cast-in-place edge-joint specimen were fabricated and tested as a control group under pseudo-static loading. The research results show that: 1) the joint exhibited a beam-end plastic hinge failure mode; 2) the load-displacement curve demonstrated favorable fullness, reflecting good ductility and energy dissipation capacity; 3) shear failure was effectively prevented in the joint core region, achieving the "strong joint, weak component" seismic design objective.

     

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