地震动空间变化对高压输电塔线体系地震反应的影响
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摘要
通过数值模拟研究了地震动空间变化对高压输电塔线体系地震反应的影响。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;在考虑地震动的行波效应、部分相干效应和局部场地效应以及多维性基础上,依据功率谱密度函数、相干函数和《电力设施抗震设计规范》模拟了空间变化地震动时程;分别研究了地震动空间变化的行波效应、部分相干效应和局部场地效应对输电塔线体系地震反应的影响。研究结果表明,地震动空间变化对输电塔线体系地震反应影响显著,忽略这些因素将会低估结构的反应。因此对于输电线路实际工程的抗震设计,需要考虑地震动空间变化效应的影响。
Here,effects of ground motion spatial variation on seismic response of a power transmission tower-line system were studied with numerical simulations.A three-dimensional finite element model for the power transmission tower-line coupled system considering the geometric nonlinearity of transmission line was established.Based on wave passage effect,coherency loss effect,different local site effect and multi-dimensional nature of ground motion,spatially varying ground motion time histories were simulated according to power spectral density function,coherency loss function and Code for Design of Seismic of Electrical Installations.The effects of wave passage,coherency loss and different local site effect on the seismic response of the transmission tower-line system were investigated,respectively.The results showed that the effects of ground motion spatial variation have significant influence on the seismic response of the transmission tower-line system;neglecting these effects may underestimate the response of the structure;the effects of ground motion spatial variation should be considered in seismic design of transmission line practical engineering.
Here,effects of ground motion spatial variation on seismic response of a power transmission tower-line system were studied with numerical simulations.A three-dimensional finite element model for the power transmission tower-line coupled system considering the geometric nonlinearity of transmission line was established.Based on wave passage effect,coherency loss effect,different local site effect and multi-dimensional nature of ground motion,spatially varying ground motion time histories were simulated according to power spectral density function,coherency loss function and Code for Design of Seismic of Electrical Installations.The effects of wave passage,coherency loss and different local site effect on the seismic response of the transmission tower-line system were investigated,respectively.The results showed that the effects of ground motion spatial variation have significant influence on the seismic response of the transmission tower-line system;neglecting these effects may underestimate the response of the structure;the effects of ground motion spatial variation should be considered in seismic design of transmission line practical engineering.
引文
[1]李宏男,王前信.大跨越输电塔体系的动力特性[J].土木工程学报,1997,30(5):28-36.LI Hong-nan,WANG Qian-xin.Dynamic characteristics of long-span transmission lines and their supporting towers[J].China Civil Engineering Journal,1997,30(5):28-36.
[2]李宏男著.结构多维抗震理论[M].北京:科学出版社,2006.
[3]Ghobarah A,Aziz T S,El-Attar M.Response of transmission lines to multiple support excitation[J].Engineering Structures,1996,18(12):936-946.
[4]李泽.大跨越输电塔线体系地震反应分析[D].上海:同济大学,2002.
[5]岳茂光,李宏男,王东升,等.行波激励下输电塔-导线体系纵向地震反应分析[J].中国电机工程学报,2006,26(23):145-150.YUE Mao-guang,LI Hong-nan,WANG Dong-sheng,et al.Longitudinal response of the power transmission tower-cable system under traveling seismic wave excitations[J].Proceedings of the CSEE,2006,26(23):145-150.
[6]田利,李宏男,黄连壮.多点激励下输电塔-线体系的侧向地震反应分析[J].中国电机工程学报,2008,28(16):108-114.TIAN Li,LI Hong-nan,HUANG Lian-zhuang.Lateral response of transmission tower-line system under multiple support excitations[J].Proceeding of the CSEE,2008,28(16):108-114.
[7]全伟,李宏男,岳茂光.多点激励下输电塔-线体系的纵向地震反应分析[J].振动与冲击,2008,27(10):75-80.QUAN Wei,LI Hong-nan,YUE Mao-guang.Longitudinal response of a power transmission tower-cable system under multi-support excitations[J].Journal of Vibration and Shock,2008,27(10):75-80.
[8]Clough R W,Penzien J.Dynamic of Structure[M].New York:Mc-Graw-Hill,Inc.,1975.
[9]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.LIU Guo-huan,LI Hong-nan,LIN Hai.Comparison and evaluation of models for structural seismic responses analysis[J].Engineering Mechanics,2009,26(2):10-15.
[10]柳国环,李宏男,国巍,等.求解结构地震响应位移输入模型中存在问题的一种新解决方法[J].工程力学,2010,27(9):55-62.LIU Guo-huan,LI Hong-nan,GUO Wei,et al.A new method for solving problem of current displacement input model for calculating structural seismic responses[J].Engineering Mechanics,2010,27(9):55-62.
[11]田利,李宏男.基于电力设施抗震设计规范的地震动随机模型参数研究[J].防灾减灾工程学报,2010,30(1):17-22.TIAN Li,LI Hong-nan.Parameter study on seismic random model based on code for design of seismic of electrical installations[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(1):17-22.
[12]GB50260-96,电力设施抗震设计规范[S].北京:1996.
[13]Hao H,Oliveira C S,Penzien J.Multiple-station ground motion processing and simulation based on smart-1array data[J].Nuclear Engineering and Design1989,111,293-310.
[14]Kaiming B,Hong H,Nawawi C.Required separation distance between decks and at abutments of a bridge crossing a canyon site to avoid seismic pounding[J].Earthquake Engineering and Structural Dynamics,2009,39(3):303-329.
[15]GB50011-2010,建筑抗震设计规范[S].北京:2010.
[16]Hao H.Arch responses to correlated multiple excitations[J].Earthquake Engineering and Structural Dynamics,1993,22:389-404.
[2]李宏男著.结构多维抗震理论[M].北京:科学出版社,2006.
[3]Ghobarah A,Aziz T S,El-Attar M.Response of transmission lines to multiple support excitation[J].Engineering Structures,1996,18(12):936-946.
[4]李泽.大跨越输电塔线体系地震反应分析[D].上海:同济大学,2002.
[5]岳茂光,李宏男,王东升,等.行波激励下输电塔-导线体系纵向地震反应分析[J].中国电机工程学报,2006,26(23):145-150.YUE Mao-guang,LI Hong-nan,WANG Dong-sheng,et al.Longitudinal response of the power transmission tower-cable system under traveling seismic wave excitations[J].Proceedings of the CSEE,2006,26(23):145-150.
[6]田利,李宏男,黄连壮.多点激励下输电塔-线体系的侧向地震反应分析[J].中国电机工程学报,2008,28(16):108-114.TIAN Li,LI Hong-nan,HUANG Lian-zhuang.Lateral response of transmission tower-line system under multiple support excitations[J].Proceeding of the CSEE,2008,28(16):108-114.
[7]全伟,李宏男,岳茂光.多点激励下输电塔-线体系的纵向地震反应分析[J].振动与冲击,2008,27(10):75-80.QUAN Wei,LI Hong-nan,YUE Mao-guang.Longitudinal response of a power transmission tower-cable system under multi-support excitations[J].Journal of Vibration and Shock,2008,27(10):75-80.
[8]Clough R W,Penzien J.Dynamic of Structure[M].New York:Mc-Graw-Hill,Inc.,1975.
[9]柳国环,李宏男,林海.结构地震响应计算模型的比较与分析[J].工程力学,2009,26(2):10-15.LIU Guo-huan,LI Hong-nan,LIN Hai.Comparison and evaluation of models for structural seismic responses analysis[J].Engineering Mechanics,2009,26(2):10-15.
[10]柳国环,李宏男,国巍,等.求解结构地震响应位移输入模型中存在问题的一种新解决方法[J].工程力学,2010,27(9):55-62.LIU Guo-huan,LI Hong-nan,GUO Wei,et al.A new method for solving problem of current displacement input model for calculating structural seismic responses[J].Engineering Mechanics,2010,27(9):55-62.
[11]田利,李宏男.基于电力设施抗震设计规范的地震动随机模型参数研究[J].防灾减灾工程学报,2010,30(1):17-22.TIAN Li,LI Hong-nan.Parameter study on seismic random model based on code for design of seismic of electrical installations[J].Journal of Disaster Prevention and Mitigation Engineering,2010,30(1):17-22.
[12]GB50260-96,电力设施抗震设计规范[S].北京:1996.
[13]Hao H,Oliveira C S,Penzien J.Multiple-station ground motion processing and simulation based on smart-1array data[J].Nuclear Engineering and Design1989,111,293-310.
[14]Kaiming B,Hong H,Nawawi C.Required separation distance between decks and at abutments of a bridge crossing a canyon site to avoid seismic pounding[J].Earthquake Engineering and Structural Dynamics,2009,39(3):303-329.
[15]GB50011-2010,建筑抗震设计规范[S].北京:2010.
[16]Hao H.Arch responses to correlated multiple excitations[J].Earthquake Engineering and Structural Dynamics,1993,22:389-404.
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