钢骨混凝土异形柱-钢梁节点抗震性能试验研究

发布时间：2018-06-02 20:36

本文选题：钢骨混凝土 + 框架节点　；参考：《振动与冲击》2016年04期

【摘要】：为了研究钢骨混凝土异形柱-钢梁节点的抗震性能,进行了4个T形钢骨混凝土柱-钢梁节点和4个L形钢骨混凝土柱-钢梁节点的拟静力试验。试验考虑了混凝土强度等级、核心区配箍率和轴压比等参数的影响,对骨架曲线、承载力、核心区剪切变形、延性和耗能能力等抗震性能指标进行了分析。结果表明,在低周往复荷载作用下,钢骨混凝土异形柱-钢梁框架节点滞回曲线饱满,表现出良好的延性性能和耗能能力,典型破坏形态为节点核心区剪切斜压破坏和节点区焊缝失效破坏;高轴压力下节点具有较高的承载能力但延性性能降低;混凝土强度越高,节点承载能力越大,但延性性能越差;增大核心区配箍率对试件的延性和承载力有明显的提高,并能改善试件屈服后的耗能能力。
[Abstract]:In order to study the seismic behavior of steel reinforced concrete special-shaped column-steel beam joints, quasi-static tests were carried out on four T-shaped steel concrete column-steel beam joints and four L-shaped steel concrete column-steel beam joints. Considering the influence of concrete strength grade, core-zone hoop ratio and axial compression ratio, the seismic performance indexes such as skeleton curve, bearing capacity, shear deformation, ductility and energy dissipation capacity were analyzed. The results show that the hysteretic curves of steel reinforced concrete special-shaped column-steel beam joints are full under low-cycle reciprocating loads, showing good ductility and energy dissipation capacity. The typical failure patterns are shear baroclinic failure in the core zone and failure of weld in the joint zone. The joint has higher bearing capacity but lower ductility under high axial pressure, and the higher the concrete strength, the greater the bearing capacity of the joint. However, the worse the ductility is, the higher the core-zone hoop ratio is, the better the ductility and the bearing capacity of the specimens are, and the energy dissipation ability of the specimens after yielding can be improved.
【作者单位】：长江大学城市建设学院;华中科技大学建筑与城市规划学院;
【基金】：国家自然科学基金项目(51108041;51478048) 湖北省教育厅科学技术研究资助项目(Q20111306) 湖北省高等学校优秀中青年科技创新团队计划项目(T201303)
【分类号】：TU398.9;TU352.11

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