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π-盖板混合式节点常用于预制板端部横板向板缝之间的连接。为研究全干式RC楼盖π-盖板混合式板缝连接节点的抗剪性能,进行了π-盖板混合式板缝节点单调和低周反复荷载下的足尺模型试验,对π-盖板混合式节点的承载力、变形能力、破坏过程和形态及耗能能力等进行系统研究。结果表明:π-盖板混合式板缝节点具有较好的延性,与盖板式节点和π式节点相比,π-盖板混合式节点具有较高的承载能力,但滞回曲线捏拢效应比较明显,耗能能力较差;节点抗剪承载力的试验值、理论值和有限元分析值均比较接近,证明了理论计算方法的正确性和有限元建模方法的可行性;建议采取有效措施避免混合式节点某一侧连接件过早破坏,从而提高节点承载力和抗震性能。
π-cover hybrid nodes commonly used in the prefabricated panels to the joints between the slab. In order to study the shear resistance of π-cover hybrid slab joints of full-thickness RC floor coverings, a full-scale model test was carried out under monotonic and low-cycle repeated loads of π-cover plate joints, The load-carrying capacity, deformation capacity, failure process, shape and energy dissipation capacity of the hybrid cover nodes were systematically studied. The results show that the π-cover hybrid joint has good ductility. Compared with the cover-type joint and the π-type joint, the π-cover hybrid joint has a higher carrying capacity, but the hysteretic curve pinches The effect is obvious and the energy dissipation capacity is poor. The test value, theoretical value and finite element analysis value of the joint shear strength are relatively close, which proves the correctness of the theoretical calculation method and the feasibility of the finite element modeling method. Effective measures to avoid premature destruction of joints on one side of the hybrid node, thereby enhancing node bearing capacity and seismic performance.