外露式钢柱脚节点抗震性能试验研究  

Research on the seismic performance of bare steel column base

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：《四川建筑科学研究》2013年第1期137-140,共4页Sichuan Building Science

基　　金：江苏省高校自然科学基金项目(07KJD560204);国家质检总局科技计划项目(2009QK163)

摘　　要：为了研究外露式钢柱脚节点抗震性能和提高外露式柱脚抗震设计的可靠性,本文针对外露式柱脚连接节点的抗震性能进行了试验研究,将两组不同的柱脚试件在循环反复荷载作用下的整体响应和各组成单元的局部响应情况进行对比。根据试验结果,分析柱脚节点在地震作用下的破坏特征、滞回特性、骨架曲线、延性及耗能指标。试验结果表明:两个试件的初始刚度基本接近,但是无翼缘支撑板的柱脚刚度退化要明显快于有翼缘支撑板的柱脚;有翼缘支撑板的柱脚的延性系数比无翼缘支撑板的柱脚提高约28.7%,而耗能系数提高约10.1%;翼缘支撑板可以提高柱脚的连接强度和承载能力,使得节点区域各构件的协同作用加强;柱脚区域的力学特性表明其破坏形式为半刚性特性且在柱根部出现塑性铰。In order to research the seismic performance of bare steel column base and to improve the reliability of its designation, this thesis by experimental research contrasts the whole response and the local response of two different base samples under cyclic loading reversals and it also analyses the column base＇s failure characteristic,the hysteretic behavior,skeleton curve, ductility and capability of energy dissipation. The result shows that the initial stiffness of two specimen are similar,but the stiffness of column base with flange- supporting board is weakening slower than the speed of column without flange-supperting board;the former column＇s ductility is higher by 28.7% than the latter, and its capability of energy dissipation is higher than the latter by 10. 1%. It concludes that the flange- supporting board can improve the column＇s connection and loading capability to strengthen the cooperative function of the node components and the mechanical characteristics of column shows that its destructive form is semi-rigid and can appear plastic hinges.

关 键 词：柱脚 抗震性能 滞回性能 耗能特性 

分 类 号：TU391[建筑科学—结构工程]