轴向力对外露式刚性柱脚抗震性能的影响
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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 connection joint and to improve its anti-seismic reliability,the thesis here uses Ansys finite element software to do a numerical 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 behavior,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.
In order to test the influence of axial force on the seismic performance of expoesd column footing connection joint and to improve its anti-seismic reliability,the thesis here uses Ansys finite element software to do a numerical 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 behavior,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.
引文
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[10]王元清,章军,石永久,等.锚栓预紧力对柱脚抗剪设计的影响分析Ⅱ:刚接柱脚[J].低温建筑技术,2005,105(3):26-29.WANG Yuanqing,ZHANG Jun,SHI Yongjiu,et al.The influence of pretightening force of foundation anchor on shear resistance,PartⅡ:rigidcolumn base[J].Low Temperature Architecture Technology,2005,105(3):26-29.
[2]朱华.简单露出型刚接柱脚变形的研究[D].西安:西安建筑科技大学,2006.ZHU Hua.Analysis on the deformation of simple exposed steel“fined”column base[D].Xi'an University of Architecture&Technology,2006.
[3]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.WANG Zhonghua.The plastic design concept and application in steel structure[J].Sichuan Building Science,2006,32(6).27-30
[4]王燕.高层建筑钢结构刚性柱脚的设计与研究[J].青岛建筑工程学院学报,1994,15(3):17-20.WANG Yan.Design and study of rigid heels in steel structure for highrise buildings[J].Journal of Qingdao Institute of Architecture and Engineer-ing,1994,15(3):17-20.
[5]李和华.钢结构连接点设计手册[M].中国建筑工业出版社1992.LI Hehua.Design manual of steel-structured connection joint[M].china Architecture&Building Press,1992.
[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):59-62.SUI Qinghai.Discuss about the design of the bare base of steel column[J].Progress in Steal Building Structures,2005,7(2):59-62.
[7]Commission of European Communities.Eurocode3(EC3)Annex J:Joints in Building Frames.(ENV1993-1-1).Bruss-tle:CEN,1993.
[8]曹万林,樊太,张维斌,等.异形截面钢骨混凝土柱抗震性能试验研究[J].世界地震工程,2004,20(2):64-68.CAO Wanlin,FAN Tai,ZHANG Weibin,et al.Experimental research on seismic behavior of special shaped SRC columns[J].World EarthquakeEngineering,2004,20(2):64-68.
[9]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(4):94-99.LI Junhua,XUE Jianyang,ZHAO Hongtie.Experimental study on the seismic performance of steel reinforced high-strength concrete columns[J].World Earthquake Engineering,2004,20(4):94-99.
[10]王元清,章军,石永久,等.锚栓预紧力对柱脚抗剪设计的影响分析Ⅱ:刚接柱脚[J].低温建筑技术,2005,105(3):26-29.WANG Yuanqing,ZHANG Jun,SHI Yongjiu,et al.The influence of pretightening force of foundation anchor on shear resistance,PartⅡ:rigidcolumn base[J].Low Temperature Architecture Technology,2005,105(3):26-29.
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