(沈阳工业大学建筑与土木工程学院， 沈阳 110870)

［摘要］对低周循环荷载作用下的复式钢管混凝土柱-钢梁节点的抗震性能进行了有限元模拟，并与试验作对比，结果表明模拟值与试验结果吻合较好。在此基础上，又分别模拟分析了低周循环荷载作用下的复式钢管混凝土柱-钢管混凝土梁节点、单层钢管混凝土柱-钢管混凝土梁节点的抗震性能，综合分析评定三种组合结构节点的耗能能力、延性、刚度退化及强度退化等抗震性能指标。分析结果表明，三种组合结构节点的破坏模式均是首先在梁根部产生塑性铰进入塑性状态。在柱子均采用复式钢管混凝土的情况下，将钢梁用钢管混凝土梁替换能够有效地提高节点的抗震性能；在除去复式钢管混凝土柱中内嵌圆钢管的情况下，将钢梁用钢管混凝土梁替换仍可在一定程度上提高节点的抗震性能。

［关键词］钢管混凝土； 节点； 有限元； 抗震性能

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2019)14-0042-06

Research on seismic behavior of new multiple concrete filled steel tube column-beam joints

Wang Ying， Bi Lingyun

（School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China）

Abstract:Seismic behavior of multiple concrete filled steel tube column-steel beam joint under low cyclic loading was carried out by finite element simulation, and compared with experiment. The results show that the simulated values are in good agreement with experimental results. Subsequently, seismic behavior of multiple concrete filled steel tube column-single layer concrete filled steel tube beam joint, single layer concrete filled steel tube column-single layer concrete filled steel tube beam joint under the low cycle load was simulated and analysed respectively. Energy dissipation capacity, ductility, stiffness degradation and strength degradation of three kinds of composite structural joints were evaluated and analysed. The results show that the failure modes of the three composite structural joints are the first to generate plastic hinges into the plastic state at the root of the beam. In the case of multiple concrete filled steel tube column, the single layer concrete filled steel tube beam instead of steel beam can effectively improve the seismic performance of the joint. Under the situation of removing the round steel tube which embedded in multiple concrete filled steel tube column, the single layer concrete filled steel tube beam instead of steel beam can still improve the seismic performance of joint to some extent.

Keywords:concrete filled steel tube; joint; finite element; seismic behavior

*国家自然科学基金（51008199）。

作者简介：王颖，博士，副教授，硕士生导师，Email: wangying30@hotmail.com。