震后端板节点高温下的损伤退化行为

发布时间：2018-04-14 08:37

本文选题：外伸端板型节点 + 循环荷载　；参考：《武汉大学学报(工学版)》2017年06期

【摘要】：介绍了循环荷载作用后的端板节点在高温下的力学性能.使用简化模型进行系统的参数研究,分组对比了同一个节点分别在单调荷载和循环荷载作用之后的高温力学性能,以及端板厚度、螺栓直径对节点抗火能力的影响.数值计算结果表明,地震往复荷载往往会给节点带来一定程度的破坏,当这种节点再遭遇随之而来的地震次生火灾时,节点已经有了初始的损伤,包括变形破坏和断裂破坏,此时节点的抗火能力、耐火时间都将受到一定程度的影响.尤其是往复荷载导致断裂破坏的节点,节点的抗火能力将严重下降.研究结果对该类梁柱节点设计具有一定参考价值.
[Abstract]:The mechanical properties of end-plate joints under cyclic loading at high temperature are introduced.The simplified model is used to study the parameters of the system. The mechanical properties of the same joint under monotone load and cyclic load at high temperature, as well as the effect of the thickness of the end plate and the diameter of bolt on the fire resistance of the joint are compared in groups.The numerical results show that the seismic reciprocating loads often bring some damage to the joints. When the joints are subjected to the subsequent secondary earthquake fire, the joints have already had initial damage, including deformation damage and fracture failure.At this time, the fire resistance of the joint, fire resistance time will be affected to some extent.Especially for the joints with failure caused by reciprocating load, the fire resistance of the joints will be seriously reduced.The results have some reference value for the design of Liang Zhu node.
【作者单位】：中国矿业大学力学与建筑工程学院;
【基金】：江苏建筑节能与建造技术协同创新中心基金(编号:SJXTY1611) 中央高校基本科研业务费专项资金资助(编号:2017XKQY049)
【分类号】：TU312.3;TU391

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