混凝土柱-波纹钢板混凝土组合梁节点抗震性能研究

Study on seismic behavior ofreinforced concrete column-corrugated steel plate composite beam joints

基于课题组研发的外包波纹钢板混凝土组合梁,提出了一种新型混凝土柱-波纹钢板混凝土组合梁连接节点形式,并进行了该类节点试件的低周往复荷载加载试验,对该类节点的破坏模式、滞回曲线、骨架曲线、延性与耗能、变形组成成分与变化规律进行了研究。结果表明:试件最终在梁端理想塑性铰区发生弯曲破坏,实现了塑性铰外移,滞回性能较好,具有良好的延性与耗能性能,梁塑性变形引起的层间位移达到68%。通过有限元软件对低周往复荷载作用下节点的受力性能进行模拟,结合试验结果验证了有限元模型的有效性,并建立混凝土柱-外包钢混凝土组合梁节点模型进行对比分析,进一步通过改变梁柱线刚度比探究节点的破坏模式,所得的梁柱线刚度比值可为工程设计提供参考。

Based on the corrugated steel sheet concrete composite beam developed by the research group,a new type of joint form of concrete column-corrugated steel sheet concrete composite beam was proposed,and the low-cycle reciprocating load loading tests of such joint specimens were carried out.The failure modes,hysteresis curves,skeleton curves,ductility and energy dissipation,deformation components and variation rules of the joint were studied.The results show that the bending failure occurs in the ideal plastic hinge area at the end of the beam,and the plastic hinge moves outward.The hysteretic properties of the specimen are good,and the ductility and energy dissipation properties are good.The interlayer displacement caused by the plastic deformation of the beam reaches 68%.Loading of low cycle through finite element software,the simulation of the bearing performance of the node,and connecting with the experiment results verify the validity of the finite element model.And the concrete column-outsourced steel concrete combination beam node model is established for comparative analysis.Further by changing the beam line stiffness ratio to explore the failure mode of the node,and suggestions on the beam-column rigidity ratio were provided for engineering design.