独立高柱广告牌的动力特性和地震响应分析
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摘要
本文以宿淮盐高速公路段上的一套独立高柱广告牌设施为研究对象,基于ANSYS分析软件建立了三维有限元模型,以此为基础对广告牌进行模态分析及地震响应时程分析,研究了不同方向地震动输入对广告牌结构地震响应的影响。由前4阶振型可以得出:该结构中桁架的整体刚度大于立柱的刚度,且结构的Y方向刚度大于X方向刚度;而由地震响应分析可得:X向输入时的节点位移大于Y向输入时的节点位移,这进一步验证了由振型分析所得出的结论。分析结果表明,用ANSYS软件能较好地模拟广告牌结构的地震响应,因此,用其来进行广告牌结构的抗震分析是可行的。
In this paper,a set of billboards on the Su Huai Yan Highway is studied,and a three dimensional finite element model of a billboard is established by using the ANSYS software.The modal and seismic response of the finite element model is analyzed.Then,influence of seismic waves of different directions upon the seismic responses of the billboard structure can be obtained by the analysis results.According to the first four modes,the following conclusions are obtained:stiffness of the truss is greater than that of the pillar,and the stiffness of the direction of Y is greater than that of the direction ofX.Based on the seismic response analysis,it can be shown that the node displacement of the direction of X input is greater than that of the direction of Y input.The results from the study indicate that the seismic response of the billboard can be simulated very well by using the ANSYS software. Therefore,it is feasible to analyze the seismic responses of billboards by using this software.
In this paper,a set of billboards on the Su Huai Yan Highway is studied,and a three dimensional finite element model of a billboard is established by using the ANSYS software.The modal and seismic response of the finite element model is analyzed.Then,influence of seismic waves of different directions upon the seismic responses of the billboard structure can be obtained by the analysis results.According to the first four modes,the following conclusions are obtained:stiffness of the truss is greater than that of the pillar,and the stiffness of the direction of Y is greater than that of the direction ofX.Based on the seismic response analysis,it can be shown that the node displacement of the direction of X input is greater than that of the direction of Y input.The results from the study indicate that the seismic response of the billboard can be simulated very well by using the ANSYS software. Therefore,it is feasible to analyze the seismic responses of billboards by using this software.
引文
[1]Pennung Warnilchai.Wind Tunnel Model Tests of Large Billboards[J]Advances in Structural Engineering,2009,12(1):103- 114
[2]阳芳,张海,周芝兰.独立柱双面广告牌风荷载计算研究[J].特种结构,2011,28(01):50-53
[3]曹永红.广告牌钢构架实例分析[J].建筑科学,2004, 20(、02):28-30
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[5]江苏南京:江苏省交通规划设计院股份有限公司.宿淮盐高速公路户外广告牌安全性评估报告[R].2011:1-31
[6]JGJ7-91网架结构设计与施工规程[S].中华人民共和国建设部,1992
[7]GB 50017-2003钢结构设计规范[S].中华人民共和国建设部, 2003
[8]王浩.土桩结构相互作用对大跨度CFST拱桥地震反应的影响[J].东南大学学报,2005,35(03):433-437
[2]阳芳,张海,周芝兰.独立柱双面广告牌风荷载计算研究[J].特种结构,2011,28(01):50-53
[3]曹永红.广告牌钢构架实例分析[J].建筑科学,2004, 20(、02):28-30
[4]樊晓.大型广告牌结构的设计及抗侧性能研究[D]江苏南京:东南大学,2006:1-41
[5]江苏南京:江苏省交通规划设计院股份有限公司.宿淮盐高速公路户外广告牌安全性评估报告[R].2011:1-31
[6]JGJ7-91网架结构设计与施工规程[S].中华人民共和国建设部,1992
[7]GB 50017-2003钢结构设计规范[S].中华人民共和国建设部, 2003
[8]王浩.土桩结构相互作用对大跨度CFST拱桥地震反应的影响[J].东南大学学报,2005,35(03):433-437
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