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为研究桁架式钢骨混凝土框架梁-钢筋混凝土柱连接节点的抗震性能,制作12个考虑钢骨含量、腹杆截面面积及轴压比三个变化参数的节点试件,对其进行低周反复荷载试验。试验观察了构件破坏过程,得到了节点梁端荷载-位移滞回曲线和骨架曲线以及各阶段的应变、荷载和位移值,并分析了节点的延性、能量耗散能力、抗剪性能。试验研究表明,该节点形式具有很好的延性和耗能能力,证明在节点区及梁端配有交叉腹杆的桁架式钢骨混凝土梁与钢筋混凝土柱节点连接方法是可靠的,节点能够有效传递弯矩和剪力。在试验研究的基础上建立了恢复力模型,模型和试验能够较好地吻合。研究成果可为工程实践提供参考。
In order to study the seismic performance of truss-type SRC-RCS joints, 12 specimens were made with three parameters including steel content, web cross-sectional area and axial compression ratio. Load test. The failure process of the member was observed and the load-displacement hysteresis curve and the skeleton curve of the beam end of the joint were obtained. The strain, load and displacement of the joint were obtained. The ductility, energy dissipation and shear resistance of the joint were analyzed. Experimental results show that the joint form has good ductility and energy dissipation capacity. It is proved that the connection between the truss-type steel reinforced concrete (SRC) and the RC column node with cross webs in the node area and at the beam end is reliable and the node can be effective Transfer bending moment and shear force. Based on the experimental study, a restorative force model is established, and the model and experiment can be well matched. The research results can provide reference for engineering practice.