塔-线耦联对输电塔抗地表变形的影响研究
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摘要
以典型的110kV双回路自立式耐张塔为例,通过ANSYS有限元软件建立单塔和塔-线耦联体系两种有限元模型,研究了两种模型在采动区地表变形下的内力响应差异。有限元分析结果表明:塔-线耦联的影响使得整塔杆件在地表变形下最大轴向力比单塔模型增加了一倍多,各杆件的轴向力都增加显著;塔-线耦联作用使得整塔杆件在地表变形下的平面内弯矩也有所增加,但与轴向力的变化相比较为平缓;单塔和塔-线耦联体系杆件的最大截面应力都发生在塔腿根部主材上,应力值差别不大,但塔-线耦联体系整个结构其它杆件的截面应力都增加明显,塔-线耦联作用对输电塔抗地表变形性能的影响不容忽视。
This paper established finite element models of a single tower and a tower-line coupling system for a typical double-circuit angle tower of 110kV to study the influence regularities of ground surface deformation on transmission tower-line system in the mining area.The results of finite element analysis show that,influenced by the coupling effect of tower and lines,the maximum value of axial force of bars in tower-line system model is more than twice bigger than that in single tower model and the values of axial forces of all bars in tower-line system model increase significantly;while the maximum value of in-plane bending moment of bars in tower-line system model increases with less sharp changing than that of axial force between the two models;same as in the tower-line system model,the maximum values of cross-section stress of bars occur in the roots of tower legs in single tower model,and the difference of the value is small between the two models,however,the section stresses of all the other bars in tower-line system increase significantly,the coupling effect of tower and line on anti-deformation properties of tower under surface deformation can not be ignored.
This paper established finite element models of a single tower and a tower-line coupling system for a typical double-circuit angle tower of 110kV to study the influence regularities of ground surface deformation on transmission tower-line system in the mining area.The results of finite element analysis show that,influenced by the coupling effect of tower and lines,the maximum value of axial force of bars in tower-line system model is more than twice bigger than that in single tower model and the values of axial forces of all bars in tower-line system model increase significantly;while the maximum value of in-plane bending moment of bars in tower-line system model increases with less sharp changing than that of axial force between the two models;same as in the tower-line system model,the maximum values of cross-section stress of bars occur in the roots of tower legs in single tower model,and the difference of the value is small between the two models,however,the section stresses of all the other bars in tower-line system increase significantly,the coupling effect of tower and line on anti-deformation properties of tower under surface deformation can not be ignored.
引文
[1]查剑锋.采动影响下高压输电线路变形机理及其控制研究[D].徐州:中国矿业大学,2005Zha Jianfeng.Study on deformation of high voltage transmission line under the influence of mining and its control[D].Xuzhou:China University of Mining and Technology,2005(in Chinese)
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[8]谭志祥.采动区建筑物地基、基础和结构协同作用理论与应用研究[D].徐州:中国矿业大学,2004Tan Zhixiang.Study on coordinating action theory of ground,foundation and structure of building in mining area and its application[D].Xuzhou:China University of Mining and Technology,2004(in Chinese)
[9]李逢春,郭广礼,邓喀中.开采沉陷对架空输电线路影响预测方法及其应用[J].矿业安全与环保,2002,29(2):18-20Li Fengchun,Guo Guangli,Deng Kazhong.Prediction method for influence of mining subsidence on overhead power transmission line and its application[J].Safety&Environmental Protection,2002,29(2):18-20(in Chinese)
[2]赵海涛,郭广礼,查剑锋.高压输电线路杆塔采动变形规律研究[J].煤矿安全,2008(5):17-19Zhao Haitao,Guo Guangli,Zha Jianfeng.Study on mining deformation of pole and tower in high voltage transmission line[J].Safety in Coal Mines,2008(5):17-19(in Chinese)
[3]李宏男,石文龙,王苏岩.高压输电塔-导线耦联体系的简化抗震计算方法[J].特种结构,2002(3):58-61Li Hongnan,Shi Wenlong,Wang Suyan.Simplified seismic calculation method for the coupled system of transmission lines and their supporting tower[J].Special Structurs,2002(3):58-61(in Chinese)
[4]郭惠勇,李正良.大跨越高压输电塔-线体系风致振动的研究与进展[J].河海大学学报:自然科学版,2008,36(1):106-111Guo Huiyong,Li Zhengliang.Advances in research of windinduced vibration of long-span high-voltage transmission line system[J].Journal of Hohai University:Natural Science Edition,2008,36(1):106-111(in Chinese)
[5]李宏男,Singh M P.大跨越高压输电塔-导线耦联体系抗震计算的反应谱方法[J].特种结构,1996,13(3):2,18-22Li Hongnan,Singh M P.Response spectral method of aseismic calculation for coupled system of long-span transmission lines and supporting towers[J].Special Structures,1996,13(3):2,18-22(in Chinese)
[6]孙超.地下采空区对地表稳定性的影响[D].哈尔滨:中国地震局工程力学研究所,2003Sun Chao.Influence of mining subsidence on the stability of ground surface[D].Harbin:Institute of Engineering Mechanics,China Earthquake Administration,2003(in Chinese)
[7]谭勇强.采动区地表曲率变形与砌体建筑的地基与基础[J].煤炭科学技术,2003,31(11):24-26Tan Yongqiang.Surface ground curvature deformation on mining area and base and foundation of lined building[J].Coal Science and Technology,2003,31(11):24-26(in Chinese)
[8]谭志祥.采动区建筑物地基、基础和结构协同作用理论与应用研究[D].徐州:中国矿业大学,2004Tan Zhixiang.Study on coordinating action theory of ground,foundation and structure of building in mining area and its application[D].Xuzhou:China University of Mining and Technology,2004(in Chinese)
[9]李逢春,郭广礼,邓喀中.开采沉陷对架空输电线路影响预测方法及其应用[J].矿业安全与环保,2002,29(2):18-20Li Fengchun,Guo Guangli,Deng Kazhong.Prediction method for influence of mining subsidence on overhead power transmission line and its application[J].Safety&Environmental Protection,2002,29(2):18-20(in Chinese)
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