钢框架加强型节点抗震性能试验研究及有限元分析

发布时间：2018-11-29 08:39

【摘要】：为探讨加强板构造形式对节点抗震性能的影响,针对盖板、翼缘过渡板、腋板以及肋板等4种不同构造形式加强型节点进行试验及有限元分析,对其承载力、荷载-位移滞回性能、塑性变形能力、耗能、破坏形态等进行研究。结果表明:在低周循环荷载作用下,4种不同构造形式的节点试件均形成塑性铰并远离梁柱连接焊缝位置,塑性铰处的梁翼缘和腹板均产生较大塑性变形,耗能效果明显,达到塑性铰外移设计要求,梁柱节点焊缝没有出现脆性破坏。加强板的构造形式对节点承载力、延性及耗能能力有较大的影响,腋板及肋板加强节点试件的承载力高于盖板和翼缘过渡板加强型节点,而后两种节点的延性和耗能能力大于前两种节点。设计中应综合考虑加强板构造形式对节点抗震性能影响。综合比较试验及有限元分析结果可知,翼缘过渡板、腋板加强型节点具有较高的承载力以及较好的延性和耗能能力,建议在高烈度抗震设防区使用。
[Abstract]:In order to investigate the effect of structural form of stiffener on the seismic behavior of joints, the test and finite element analysis were carried out for four different structural forms of reinforced joints, such as cover plate, flange transition plate, axillary plate and ribbed plate, and the bearing capacity of the joints was analyzed by finite element method. Load-displacement hysteretic performance, plastic deformation capacity, energy dissipation, failure morphology and so on are studied. The results show that, under low cycle cyclic load, plastic hinge is formed in four different types of joint specimens and is far away from Liang Zhu joint weld, and the beam flange and web at plastic hinge produce large plastic deformation, and the energy dissipation effect is obvious. To meet the design requirements of plastic hinge displacement, there is no brittle failure of Liang Zhu joint weld. The structural form of stiffener has great influence on the bearing capacity, ductility and energy dissipation capacity of the joints, and the bearing capacity of the stiffened joints of axillary and ribbed plates is higher than that of the strengthened joints with cover plates and flange transition plates. The ductility and energy dissipation capacity of the latter two kinds of nodes are higher than those of the first two kinds of nodes. In the design, the influence of the structural form of the strengthened plate on the seismic behavior of the joints should be considered synthetically. Comprehensive comparison and finite element analysis results show that the flange transition plate and axillary plate reinforced joints have higher bearing capacity and better ductility and energy dissipation capacity. It is suggested that the joints should be used in high intensity seismic fortification areas.
【作者单位】：青岛理工大学土木工程学院;
【基金】：国家自然科学基金项目(51078194,51278259)
【分类号】：TU391;TU352.11

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