输电塔线体系在多维地震激励下的响应分析
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摘要
通过数值模拟研究了多维地震激励下高压输电塔线体系地震响应。建立了输电塔线耦联体系三维有限元模型,考虑了输电线的几何非线性特征;依据《电力设施抗震设计规范》选取了不同场地的12条地震记录;利用非线性时程分析方法,分别研究了单维、双向和多维地震激励下输电塔线体系的地震响应。研究结果表明,输电塔线体系在多维地震激励下的响应明显地大于仅考虑单维地震激励,特别是仅考虑竖向地震激励的情况,在分析中忽略地震动的多维性将会低估结构的地震响应。为了得到精确的结构地震响应并更好地进行输电塔线体系的抗震设计,需要考虑多维地震输入。研究结果可为输电线路实际工程抗震设计提供参考。
Seismic responses of power transmission tower-line system under multi-component excitations were analyzed by numerical simulation.A three-dimensional finite element model of transmission tower-line coupled system considering the geometric nonlinearity of transmission line was established.Twelve seismic records of different soil types were selected based on Code for Design of Seismic of Electrical Installations.Seismic responses of power transmission tower-line system under single component,two horizontal component and multi-component excitations were investigated using nonlinear time history analysis method,respectively.The results show that the responses of transmission tower-line system under multi-component excitations are significantly larger than those under single component excitation only,especially for considering vertical ground motion excitation only,and neglecting multiple nature of ground motion in analysis will underestimate the responses of the structure.To obtain an accurate seismic response and a better seismic design of transmission tower-line system,multi-component ground motion inputs need to be considered.The results provide reference for seismic design of transmission line practical engineering.
Seismic responses of power transmission tower-line system under multi-component excitations were analyzed by numerical simulation.A three-dimensional finite element model of transmission tower-line coupled system considering the geometric nonlinearity of transmission line was established.Twelve seismic records of different soil types were selected based on Code for Design of Seismic of Electrical Installations.Seismic responses of power transmission tower-line system under single component,two horizontal component and multi-component excitations were investigated using nonlinear time history analysis method,respectively.The results show that the responses of transmission tower-line system under multi-component excitations are significantly larger than those under single component excitation only,especially for considering vertical ground motion excitation only,and neglecting multiple nature of ground motion in analysis will underestimate the responses of the structure.To obtain an accurate seismic response and a better seismic design of transmission tower-line system,multi-component ground motion inputs need to be considered.The results provide reference for seismic design of transmission line practical engineering.
引文
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[10]张爱林,张传成,刘学春.多维地震输入下首都机场航站楼T3反应谱分析[J].地震工程与工程振动,2008,28(1):32-37.Zhang A L,Zhang C C,Liu X C,et al.The responsespectrum analysis of terminal building of Beijing capitalairport under multi-dimensional earthquake input[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(1):32-37.
[11]李宏男,王前信.水平与摇摆地震动作用下大跨越输电塔体系的反应分析[J].工程力学,1991,8(4):68-79.Li H N,Wang Q X.Response analysis of the systemxonsisting of long span transmission lines and theirsupporting towers to horizontal and rocking seismicmotions[J].Engineering Mechanics,1991,8(4):68-79.
[12]李保华.输电塔线体系多维地震反应分析[D].哈尔滨:哈尔滨工业大学,2007.
[13]Tian L,Li H N.Parametric study of seismic responseof transmission tower-line system subjected to multi-component earthquake excitations[C]//Earth&SpaceConference,ASCE,Hawaii,America,2010:2925-2932.
[14]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,1997.
[15]Wilson E L.Three dimensional static and dynamicanalysis of structures:a physical approach withemphasis on earthquake engineering[M].Computersand Structures,Inc,Berkley,California,2002.
[16]GB50260-96电力设施抗震设计规范[S].北京:1996.
[2]谢强,李杰.电力系统自然灾害的现状与对策[J].自然灾害学报,2006,15(4):126-131.Xie Q,Li J.Current situation of natural disaster inelectric power system and counterm easures[J].Journalof Natural Disasters,2006,15(4):126-131.
[3]尹荣华,李东亮,刘戈林,等.高压输电塔震害及抗震研究[J].世界地震工程,2005,21(1):51-54.Yin R H,Li D L,Liu G L,et al.Seismic damage andanalysis of power transmission towers[J].WorldEarthquake Engineering,2005,21(1):51-54.
[4]Hall F J.Northridge earthquake of January 17,1994:reconnaissance report[J].Earthquake Spectral,1995,11(3):212-215.
[5]Shinozuka M.The Hanshin-Awaji earthquake ofJanuary 17,1994:performance of lifelines[R].StateUniversity of New York at Buffalo,NCEER report:95-0015.
[6]张子引,赵彪,曹伟炜.四川汶川8.0级地震电网受灾情况调研与初步分析[J].电力技术经济,2008,20(4):1-4.Zhang Z Y,Zhao B,Cao W W.Investigation andpreliminary analysis of damages on the power grid in theWenchuan earthquake of M8.0[J].Electric PowerTechnologic Economics,2008,20(4):1-4.
[7]李宏男.结构多维抗震理论[M].北京:科学出版社,2006.
[8]薛素铎,曹资.多维地震作用下网壳结构的随机分析方法[J].空间结构,2002,8(1):44-51.Xue S D,Cao Z.Random analysis method for latticeshells under multiple earthquake excitaitons[J].SpatialStructures,2002,8(1):44-51.
[9]易方民,高小旺.高层建筑钢结构在多维地震动输入作用下的反应[J].建筑结构学报,2003,24(3):33-43.Yi F M,Gao X W.Response of tall-building steelstructure to multi-dimensional seismic action[J].Journal of Building Structires,2003,24(3):33-43.
[10]张爱林,张传成,刘学春.多维地震输入下首都机场航站楼T3反应谱分析[J].地震工程与工程振动,2008,28(1):32-37.Zhang A L,Zhang C C,Liu X C,et al.The responsespectrum analysis of terminal building of Beijing capitalairport under multi-dimensional earthquake input[J].Journal of Earthquake Engineering and EngineeringVibration,2008,28(1):32-37.
[11]李宏男,王前信.水平与摇摆地震动作用下大跨越输电塔体系的反应分析[J].工程力学,1991,8(4):68-79.Li H N,Wang Q X.Response analysis of the systemxonsisting of long span transmission lines and theirsupporting towers to horizontal and rocking seismicmotions[J].Engineering Mechanics,1991,8(4):68-79.
[12]李保华.输电塔线体系多维地震反应分析[D].哈尔滨:哈尔滨工业大学,2007.
[13]Tian L,Li H N.Parametric study of seismic responseof transmission tower-line system subjected to multi-component earthquake excitations[C]//Earth&SpaceConference,ASCE,Hawaii,America,2010:2925-2932.
[14]沈世钊,徐崇宝,赵臣.悬索结构设计[M].北京:中国建筑工业出版社,1997.
[15]Wilson E L.Three dimensional static and dynamicanalysis of structures:a physical approach withemphasis on earthquake engineering[M].Computersand Structures,Inc,Berkley,California,2002.
[16]GB50260-96电力设施抗震设计规范[S].北京:1996.
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