论文部分内容阅读
本文对广州地铁盖挖逆筑公园前车站钢管混凝土框架节点的抗剪性能作了试验研究，包括３个１：５模型的静载试验和１个１：２模型的动载试验。研究得出：（１）该节点上钢管混凝土柱的钢管与核心混凝土的界面没有粘结摩擦力，节点不是由此摩擦力传递剪力，节点抗剪主要由下柱的局部承压承担。（２）钢管材质为３号钢时，公园前车站梁、柱节点的极限抗剪能力约是设计荷载（剪力）的４倍；而公园前车站钢管柱的钢管为１６Ｍｎ钢，其屈服强度高于３号钢，因此该节点的极限抗剪能力将大于４倍的设计荷载（剪力）。（３）列车运行产生的循环荷载对节点抗剪性能影响很小。
In this paper, the shear resistance of CFST joints in the former station of Guangzhou Metro undercut-roof construction is studied, including three 1: 5 model static load tests and 1 1: 2 model dynamic load test. The results show that: (1) The interface between the steel tube and the core concrete of the concrete-filled steel tubular column at this node has no bond friction, and the node does not transmit the shear force by this friction force. The node shear resistance is mainly borne by the partial pressure of the lower column. (2) When the steel pipe is made of steel 3, the ultimate shear capacity of beam and column joints in front of the station is about 4 times of the design load (shear force); while the steel pipe of steel column in the former station of the park is 16Mn steel, the yield strength Higher than steel 3, the ultimate shear capacity of this node will be greater than 4 times the design load (shear force). (3) The cyclic loading generated by train operation has little effect on the shear resistance of joints.