摘要
根据钢筋屈服点的不同,分别制作了一级钢筋、三级钢筋以及低屈服点钢筋的RC十字型节点;通过进行低周反复加载试验,得到了3种节点构件在水平荷载下的滞回曲线,分析比较了3种节点构件的耗能能力、延性、刚度退化等特征。试验结果表明:试件J-3在各级位移控制下第1循环的滞回环面积大于试件J-1、J-2;试件J-3的位移延性系数也远大于试件J-1、J-2;配置低屈服点钢筋的节点比配置一级钢、三级钢的节点耗能能力强,延性也有明显的提高。
According to different steel yield points, respectively, an HPB235 node, an HRB400- node and a low yield point steel RC cross shaped node were produced. By conducting low cyclic loading tests, the hysteresis curves of three nodes at the horizontal loading were got. Authors analyzed and compared with the energy dissipation capacity, ductility, stiffness degradation characteristics of three nodes. The test results show that the hysteresis loop area of specimen J-3 at the first cycle under displacement control of all levels is greater than specimens J-1, J-2; the displacement ductility factor of specimen J-3 is much larger than specimens J-1, J-2. A low yield point steel node has stronger energy dissipation capacity than an HPB235-node and an HRB400- node. The low yield point steel node is a marked increase ductility.
出处
《建筑科学与工程学报》
CAS
2011年第3期9-13,共5页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(50778157)
关键词
十字型节点
低屈服点钢筋
低周反复加载试验
耗能能力
cross shaped node
low yield point steel
low cyclic loading test
energy dissipation capacity
