多维多点地震动激励下折线型输电塔线体系反应分析
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摘要
本文通过数值分析研究多维多点地震对折线型输电塔线体系地震反应的影响。根据实际工程建立折线型输电塔线体系三维有限元模型,依据功率谱密度函数、折线型相干函数和《电力设施抗震设计规范》模拟多维多点地震动时程。分别研究空间变化地震动的行波效应、部分相干效应和局部场地效应对折线型输电塔线体系地震反应的影响。研究结果表明,多维多点地震动对折线型输电塔线体系地震反应影响显著;与一致激励相比,考虑多维多点地震动增大了结构的地震反应,传统的一致地震输入将会低估结构的反应。因此对于折线型输电线路实际工程的抗震设计,需要考虑多维多点地震动的影响。
In this paper,seismic responses of transmission tower-line system under multi-component multi-support excitations are studied by numerical analysis.A three-dimensional finite element model of fold linear type transmission tower-line coupled system is established,respectively.Multi-component multi-support seismic time histories are simulated according to power spectral density function,coherency loss function and Code for Design of Seismic of Electrical Installations.The effects of wave passage effect,coherency loss effect and different local site effect on seismic response of fold linear type transmission tower-line system are investigated,respectively.The results show that multi-component multi-support ground motions have significant influence on the seismic response of fold line type transmission tower-line system.Compared with response of structure under uniform ground motion excitation,the seismic response of structure is amplified when considering multi-component multi-support ground motions.The conventional uniform ground motion input will underestimate the seismic response of the structure.Neglecting these effects will underestimate the response of structure.The effect of multi-component multi-support ground motions should be considered in seismic design of fold line type transmission line practical engineering.
In this paper,seismic responses of transmission tower-line system under multi-component multi-support excitations are studied by numerical analysis.A three-dimensional finite element model of fold linear type transmission tower-line coupled system is established,respectively.Multi-component multi-support seismic time histories are simulated according to power spectral density function,coherency loss function and Code for Design of Seismic of Electrical Installations.The effects of wave passage effect,coherency loss effect and different local site effect on seismic response of fold linear type transmission tower-line system are investigated,respectively.The results show that multi-component multi-support ground motions have significant influence on the seismic response of fold line type transmission tower-line system.Compared with response of structure under uniform ground motion excitation,the seismic response of structure is amplified when considering multi-component multi-support ground motions.The conventional uniform ground motion input will underestimate the seismic response of the structure.Neglecting these effects will underestimate the response of structure.The effect of multi-component multi-support ground motions should be considered in seismic design of fold line type transmission line practical engineering.
引文
[1]李宏男.结构多维抗震理论[M].北京:科学出版社,2006(Li Hongnan.Theoretical analysis of structures tomultiple earthquake excitations[M].Beijing:ScientificPress,2006(in Chinese))
[2]屈铁军,王前信.多点输入地震反应分析的进展[J].世界地震工程,1993,9(1):30-36(Qu Tiejun,WangQianxin.Status of seismic response analysis under multi-support excitation[J].World Earthquake Engineering,1993,9(1):30-36(in Chinese))
[3]Clough R W,Penzien J.Dynamic of structure[M].NewYork:Mc-Graw-Hill Inc.,1975
[4]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 Hongnan.Parameter study onseismic random model based on code for design of seismicof electrical installations[J].Journal of Disaster Preventionand Mitigation Engineering,2010,30(1):17-22(inChinese))
[5]GB50260─1996电力设施抗震设计规范[S].北京:中国计划出版社,1996(GB50260─1996Code for design ofseismic of electrical installations[S].Beijing:China PlanPress,1996(in Chinese))
[6]Hao H,Oliveira C S,Penzien J.Multiple-station groundmotion processing and simulation based on smart-1 arraydata[J].Nuclear Engineering and Design 1989,111:293-310
[7]Bi Kaiming,Hao Hong,Chouw N.Required separationdistance between decks and at abutments of a bridgecrossing a canyon site to avoid seismic pounding[J].Earthquake Engineering and Structural Dynamics,2009,39(3):303-329
[8]GB50011─2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB50011─2010Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[2]屈铁军,王前信.多点输入地震反应分析的进展[J].世界地震工程,1993,9(1):30-36(Qu Tiejun,WangQianxin.Status of seismic response analysis under multi-support excitation[J].World Earthquake Engineering,1993,9(1):30-36(in Chinese))
[3]Clough R W,Penzien J.Dynamic of structure[M].NewYork:Mc-Graw-Hill Inc.,1975
[4]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 Hongnan.Parameter study onseismic random model based on code for design of seismicof electrical installations[J].Journal of Disaster Preventionand Mitigation Engineering,2010,30(1):17-22(inChinese))
[5]GB50260─1996电力设施抗震设计规范[S].北京:中国计划出版社,1996(GB50260─1996Code for design ofseismic of electrical installations[S].Beijing:China PlanPress,1996(in Chinese))
[6]Hao H,Oliveira C S,Penzien J.Multiple-station groundmotion processing and simulation based on smart-1 arraydata[J].Nuclear Engineering and Design 1989,111:293-310
[7]Bi Kaiming,Hao Hong,Chouw N.Required separationdistance between decks and at abutments of a bridgecrossing a canyon site to avoid seismic pounding[J].Earthquake Engineering and Structural Dynamics,2009,39(3):303-329
[8]GB50011─2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB50011─2010Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
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