外露式钢柱脚节点抗震性能试验研究
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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-supporting 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.
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-supporting 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.
引文
[1]宋岩,王永.水平往复荷载作用下外露式刚接柱脚抗剪性能研究[J].建筑科学,2010,26(11):25-28.
[2]吴渭.轻型H型钢外露式固接柱脚抗震性能研究[D].徐州:中国矿业大学,2006:12-16.
[3]李和华.钢结构连接节点设计手册[M].北京:中国建筑工业出版社,1992:191-203.
[4]王中华.钢结构中的塑性设计概念及其应用[J].四川建筑科学研究,2006,32(6):27-30.
[5]GB101—96建筑抗震试验方法规程[S].
[6]隋庆海.外露式钢柱脚节点连接设计的几个问题刍议[J].建筑钢结构进展,2005,7(2):26-27.
[7]李俊华,薛建阳,赵鸿铁.型钢高强混凝土柱抗震性能的试验研究[J].世界地震工程,2004,20(04):94-99.
[8]刘文吉.钢梁与混凝土墙刚接节点抗震性能试验研究[D].武汉:武汉理工大学,2006:15-16.
[9]Daeyong Lee.Seismic behavior of column-base plate connectionsbending about weak axis[J].Doctor of Philosophy in the universityof Michigan.2001(5):5-6.
[10]周天华.方钢管混凝土柱钢梁框架节点抗展性能及承载力研究[D].西安:西安建筑科技大学土木工程学院,2004:22-23.
[11]李忠献.工程结构试验理论与技术[M].天津:天津大学出版社,2003:23-26,56-60.
[12]Commission of European Communities.Eurocode3(EC3)Annex J:Joints in Building Frames.(ENV1993-1-1).Bruss-tle:CEN,1993.
[2]吴渭.轻型H型钢外露式固接柱脚抗震性能研究[D].徐州:中国矿业大学,2006:12-16.
[3]李和华.钢结构连接节点设计手册[M].北京:中国建筑工业出版社,1992:191-203.
[4]王中华.钢结构中的塑性设计概念及其应用[J].四川建筑科学研究,2006,32(6):27-30.
[5]GB101—96建筑抗震试验方法规程[S].
[6]隋庆海.外露式钢柱脚节点连接设计的几个问题刍议[J].建筑钢结构进展,2005,7(2):26-27.
[7]李俊华,薛建阳,赵鸿铁.型钢高强混凝土柱抗震性能的试验研究[J].世界地震工程,2004,20(04):94-99.
[8]刘文吉.钢梁与混凝土墙刚接节点抗震性能试验研究[D].武汉:武汉理工大学,2006:15-16.
[9]Daeyong Lee.Seismic behavior of column-base plate connectionsbending about weak axis[J].Doctor of Philosophy in the universityof Michigan.2001(5):5-6.
[10]周天华.方钢管混凝土柱钢梁框架节点抗展性能及承载力研究[D].西安:西安建筑科技大学土木工程学院,2004:22-23.
[11]李忠献.工程结构试验理论与技术[M].天津:天津大学出版社,2003:23-26,56-60.
[12]Commission of European Communities.Eurocode3(EC3)Annex J:Joints in Building Frames.(ENV1993-1-1).Bruss-tle:CEN,1993.
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