钢-混凝土组合梁钢框架节点抗震性能试验

Tests on seismic behavior of joints in steel frame with steel-concrete composite beams

摘要:

为了研究钢-混凝土组合梁钢框架节点的抗震性能,本文进行了3个1／2缩尺的钢-混凝土组合梁钢框架节点的拟静力试验,主要研究了节点类型(2个中柱节点、1个边柱节点)、混凝土板宽度等对组合节点抗震性能的影响,对节点的破坏模式、滞回曲线、耗能能力、延性、强度和刚度退化等性能进行了研究,并利用有限元软件ABAQUS对组合节点在单调荷载作用下弹塑性性能进行分析,对比可知理论分析与试验结果吻合较好．研究表明:组合节点的变形能力以及耗能能力较强,强度与刚度退化不明显,节点位置和混凝土板有效宽度对节点抗震性能影响较大．

Abstract:

To study the seismic behavior of joints in steel frame with steel-concrete composite beams, 3 quasi-static tests of 1／2 reduced scale joints in steel frame with steel-concrete composite beams were carried out, which mainly focused on the influence of joint location(two middle column joints, a side column joint) and effective width of concrete slab on seismic performance of the composite joints. The failure mode of the joint, the hysteresis curve, energy dissipation capacity, ductility, strength degradation and stiffness degradation properties have also been studied. ABAQUS software has been used to analyze the elastic-plastic performance of the joints under monotonic loading. The finite element analysis results are in good agreement with the experimental results. It is shown that deformation capacity and energy dissipation ability of joints are high; strength degradation and stiffness degradation are not obvious; joints location and the effective width of concrete slab have much influence on the seismic performance of the joints.