轴向力对外露式刚性柱脚抗震性能的影响  

Research on the seismic performance of exposed column footing connection joint under axial loading

作　　者：宋岩[1] 王永 

机构地区：[1]徐州工程学院,江苏徐州221008 [2]国家网架及钢结构产品质量监督检验中心,江苏徐州221006

出　　处：《世界地震工程》2011年第1期131-135,共5页World Earthquake Engineering

基　　金：2007年江苏省高校自然科学基金项目(07KJ560204);2009年国家质检总局科技计划项目(2009QK163);徐州工程学院重点科研项目(XKY2007240)

摘　　要：为了研究轴向力对外露式刚性柱脚抗震性能的影响并提高外露式柱脚抗震设计的可靠性,文中利用Ansys有限元软件,针对外露式柱脚连接节点的抗震性能进行了数值模拟研究,将有无轴向力作用的两组柱脚试件抗震性能进行对比,分析了其在往复荷载作用下的破坏特征、滞回特性、骨架曲线、延性及耗能指标。根据数值模拟结果,提出水平地震荷载作用下轴向力会加速试件割线刚度的退化,给出一些抗震设计建议,为今后的工程设计和研究提供参考。In order to test the influence of axial force on the seismic performance of expoesd column footing connec- tion joint and to improve its anti-seismic reliability, the thesis here uses Ansys finite element software to do a nu- merical simulation research on the seismic performance of exposed footing connection and compares the different performances of two column footings with and without axial force by analysing its failure features, hysterestic behav- ior, ductility and capability of energy dissipation. According to the testing results, it has been found that under the influence of horizontal seismic load, the axial force will accelerate the secant stiffness degradation of the sample. At last, the thesis raises several suggestions as a reference to the future related design and research.

关 键 词：柱脚 滞回性能 延性 耗能特性 

分 类 号：TU391[建筑科学—结构工程] P315.95[天文地球—地震学]