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为研究钢筋套筒挤压连接的装配整体式叠合梁-预制柱中节点的抗震性能,进行了2个装配整体式中节点和1个现浇中节点试件的拟静力试验,观察其破坏现象,研究其滞回性能、承载力、变形能力及钢筋应变发展过程。结果表明:所设计的核心区剪切破坏和梁端弯曲破坏节点均实现了预期的破坏形态;核心区剪切破坏的装配整体式梁柱节点与现浇对比节点的破坏过程、裂缝分布基本一致,滞回曲线、承载力、刚度、变形、耗能等性能指标基本相同;核心区剪切破坏、梁端弯曲破坏的装配整体式梁柱中节点的承载力试验值与相应的规范公式计算值的比值分别为1.62、1.31,等效极限层间位移角分别为1/26和1/27;试验结束后,凿开混凝土发现套筒没有出现裂纹,钢筋在套筒内未见滑移,套筒挤压接头可有效传递钢筋拉、压力。
In order to study the seismic behavior of the joints of prefabricated monolithic composite beam-column with extruded steel sleeve, two quasi-static tests were carried out on two specimens with integrated mid-node and one in- Destroy phenomenon, study its hysteretic performance, bearing capacity, deformation capacity and steel strain development process. The results show that the designed failure modes of the core area and the bending failure nodes of the beam ends all achieve the expected failure modes. The failure process of the integrated beam-column joints with the core-in-place shear failure and the in-situ contrast nodes are basically the same , Hysteresis curve, bearing capacity, stiffness, deformation, energy consumption and other performance indicators are basically the same; shear failure in the core area, the bending failure of the beam integral test points in the column bearing capacity and the corresponding standard formula Respectively 1.62 and 1.31, and the equivalent ultimate displacement angles are 1/26 and 1/27, respectively. After the test, the concrete was found to be free of cracks and the steel bar did not slip within the sleeve. Pressure joints can effectively transfer steel pull, pressure.