节点刚度对方管空间三角形桁架动力性能的影响
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摘要
为研究节点刚度对方管空间三角形桁架动力性能的影响,以精细壳元模型为标准,采用可考虑节点轴向刚度的简化模型和不能考虑节点轴向刚度的刚接模型,对方管空间三角形桁架进行了模态分析和地震时程分析。结果表明:节点刚度对方管桁架的动力性能有不可忽视的影响,不宜采用刚接模型分析方管桁架的动力反应;本文中采用的简化模型可以较好地模拟方管桁架的动力性能,体现了节点刚度对结构动力性能的影响,更适用于实际工程分析。
In order to study the influence of joint stiffness on dynamic behavior of spatial triangular square hollow section(SHS) truss,the modal analysis and seismic time history analysis of the spatial triangular SHS truss were done using three models: the fine shell element model which was regarded as standard,the simplified model considering the joint axial stiffness and the rigid connected model without considering the joint axial stiffness.The results show that the influence of joint stiffness on the dynamic behavior of square tube truss cannot be negligible and the rigid connected model is not suitable for the dynamic response analysis of square tube trusses,but the simplified model can simulate the dynamic behavior of square tube truss more accurately and reflect the effect of joint stiffness better.The simplified model in the paper is more suitable for the practical engineering analysis.
In order to study the influence of joint stiffness on dynamic behavior of spatial triangular square hollow section(SHS) truss,the modal analysis and seismic time history analysis of the spatial triangular SHS truss were done using three models: the fine shell element model which was regarded as standard,the simplified model considering the joint axial stiffness and the rigid connected model without considering the joint axial stiffness.The results show that the influence of joint stiffness on the dynamic behavior of square tube truss cannot be negligible and the rigid connected model is not suitable for the dynamic response analysis of square tube trusses,but the simplified model can simulate the dynamic behavior of square tube truss more accurately and reflect the effect of joint stiffness better.The simplified model in the paper is more suitable for the practical engineering analysis.
引文
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[2]PACKER J A,HENDERSON J E.空心管结构连接设计指南[M].曹俊杰,译.北京:科学出版社,1997.PACKER J A,HENDERSON J E.Design Guide forHollow Structural Section Connections[M].Transla-ted by Cao Jun-jie.Beijing:Science Press,1997.
[3]何小辉.节点刚度对方管空间三角形桁架静动力性能的影响[D].哈尔滨:哈尔滨工业大学,2007.HE Xiao-hui.The Effect of Joint Stiffness on theStatic and Dynamic Behavior of the Spatial TriangularSHS Truss[D].Harbin:Harbin Institute of Technol-ogy,2007.
[4]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,33(6):33-37.YANG Pu,LI Ying-min,LAI Ming.A New Methodfor Selecting Inputting Waves for Time-history Anal-ysis[J].China Civil Engineering Journal,2000,33(6):33-37.
[5]黄宗明,白绍良,赖明.结构地震反应时程分析中的阻尼问题评述[J].地震工程与工程震动,1996,16(2):95-105HUANG Zong-ming,BAI Shao-liang,LAI Ming.Re-view on the Damping in Earthquake Response Time-history Analysis of Structures[J].Earthquake Engin-eering and Engineering Vibration,1996,16(2):95-105.
[6]ANSYS Inc.ANSYS Theory Reference[M].Canons-burg:ANSYS Inc,2009.
[7]武振宇,张扬,何小辉,等.Y形直接焊接矩形钢管节点滞回性能试验研究[J].建筑结构学报,2010,31(8):63-70.WU Zhen-yu,ZHANG Yang,HE Xiao-hui,et al.Ex-perimental Research on Hysteretic Behavior of Y-typeRHS Joints[J].Journal of Building Structures,2010,31(8):63-70.
[8]黄永辉,王荣辉,甘泉.钢桁梁桥整体节点焊接残余应力试验[J].中国公路学报,2011,24(1):83-88.HUANG Yong-hui,WANG Rong-hui,GAN Quan.Experiment on Welding Residual Stress of IntegralJoint for Steel Truss Bridge[J].China Journal ofHighway and Transport,2011,24(1):83-88.
[9]谭明鹤,王荣辉,黄永辉,等.刚性悬索加劲钢桁梁桥特殊节点模型试验[J].中国公路学报,2008,21(1):47-52.TAN Ming-he,WANG Rong-hui,HUANG Yong-hui,et al.Special Joint Model Test of Stiff SuspensionReinforced Steel Truss Bridge[J].China Journal ofHighway and Transport,2008,21(1):47-52.
[10]吴涛,刘伯权,邢国华,等.框架变梁变柱中节点抗裂性能试验[J].长安大学学报:自然科学版,2009,29(4):77-81.WU Tao,LIU Bo-quan,XING Guo-hua,et al.CrackResistance Test of Interior Joints with Abrupt Reduc-tion in Beam and Column Section in Reinforced Con-crete Frame[J].Journal of Changan University:Nat-ural Science Edition,2009,29(4):77-81.
[11]刘永健,周绪红,刘君平.矩形钢管混凝土T、Y型节点受压性能试验[J].长安大学学报:自然科学版,2008,28(5):48-52.LIU Yong-jian,ZHOU Xu-hong,LIU Jun-ping.Be-havior of Concrete Filled Rectangular Steel Tube T-joints and Y-joints Under Compression[J].Journal ofChangan University:Natural Science Edition,2008,28(5):48-52.
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