行波激励下输电塔-线体系纵向地震反应分析
摘要
基于所建立的输电塔-导线体系空间有限元模型,利用非线性时程分析法研究了体系在行波输入下纵向地震反应特性,并和一致地震动输入下的反应情况进行比较。结果表明：行波输入可增加也可降低输电塔的地震反应,这与行波波速、地震动性质都有关系；行波输入很大程度上增加了导线的轴力反应,随着行波波速的提高导线轴力逐步降低并接近于一致输入时的情况；行波输入强烈地放大了导线的纵向和竖向位移反应,特别是后者在近断层地震波输入时；输电塔—导线体系的地震反应受行波波速影响很大。
Based on the established model of the power transmission tower-cable system,the seismic response of which is analyzed with time history method.Furthermore,the seismic response under traveling seismic wave excitations is compared with that under uniform excitations,the result indicates that:the traveling seismic wave excitation can increase,or decrease the seismic response of the transmission tower-cable system,which depends on both the traveling-wave velocity and the ground motion characteristic;the traveling seismic wave excitations increase the cable's axis force in a large scale,which will decrease gradually and is close to the case of uniform excitations along with the traveling wave velocity increasing;the traveling wave strongly magnifiy the cable's displacement response on the longitudinal and vertical,especially the latter is under the excitations of the near-fault ground motions;the traveling wave velocity has a great effect on the seismic response of the power transmission tower-cable system.
Based on the established model of the power transmission tower-cable system,the seismic response of which is analyzed with time history method.Furthermore,the seismic response under traveling seismic wave excitations is compared with that under uniform excitations,the result indicates that:the traveling seismic wave excitation can increase,or decrease the seismic response of the transmission tower-cable system,which depends on both the traveling-wave velocity and the ground motion characteristic;the traveling seismic wave excitations increase the cable's axis force in a large scale,which will decrease gradually and is close to the case of uniform excitations along with the traveling wave velocity increasing;the traveling wave strongly magnifiy the cable's displacement response on the longitudinal and vertical,especially the latter is under the excitations of the near-fault ground motions;the traveling wave velocity has a great effect on the seismic response of the power transmission tower-cable system.
引文
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[2]周浩，余宇红．我国发展特高压输电中一些重要问题的讨论[J]．电网技术，2005，29(12)：1-9．Zhou Hao,Yu Yuhong.Discussion on several important problems of developing UHV AC transmission in China[J].Power System Technology,2005,29(12):1-9(in Chinese).
[3]屈靖，郭剑波．“九五”期间我国电网事故统计分析[J]．电网技术，2004，28(21)：60-62．Qu Jing,Guo Jianbo.Statistics and analysis of faults in main domestic power systems from 1996 to 2000[J].2004,28(21):60-62(in Chinese).
[4]中村秋夫，冈本浩，曹祥麟．东京电力公司的特高压输电技术应用现状[J]．电网技术，2005，29(6)：1-5．Nakamura Aki-o,Okamoto Hiroshi,Cao Xianglin.Introduction to 1000kV Transmission Technologies Conducted by Tokyo Electric Power Company[J].Power System Technology,2005,29(6):1-5(in Chinese).
[5]莫付江，陈允平，阮江军．输电线路杆塔模型与防雷性能计算研究[J]．电网技术，2004，28(21)：80-84．Mo Fujiang,Chen yunping,Ruan Jiangjun.Study on transmission tower models and their lightning performance calculation[J].Power System Technology,2004,28(21):80-84(in Chinese).
[6]张禹芳．我国500kV输电线路风偏闪络分析[J]．电网技术，2005，29(7)：65-67．Zhang Yufang.Analysis on flashover between tower and conducting wires in domestic 500kV transmission lines caused by windage yaw[J].Power System Technology,2005,29(7):65-67(in Chinese).
[7]韩祯祥，曹一家．电力系统的安全性及防治措施[J]．电网技术，2004，28(91：1-6．Han Zhenxiang,Cao Yijia.Power system security and its prevention[J].Power System Technology,2004,28(9):1-6(in Chinese).
[8]张强，王宝华，杨成梧．电力系统周期振荡的失稳分析[J]．电网技术，2004，28(22)：15-19．Zhang Qiang,Wang Baohua,Yang Chengwu.Analysis of unstable periodic oscillations in power system[J].Power System Technology,2004,28(22):15-19(in Chinese).
[9]Kiureghian A.D,Neuenhofer A.Response spectrum method for multi-support seismic excitations[J].Earthquake Engineering and Structural Dynamics,1992,21(8):713-740.
[10]台湾地震工程研究中心．九二一集集大地震震灾调查报告[R]．台北，2001．Taiwan Earthquake Engineering Research Center.Report on the 921 Chi-Chi(Taiwan)Large Earthquake Disasters[R].Taibei,2001(inChinese).
[11]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 Ronghua,Li Dongliang,Liu Gelin,et al.Seismic damage and analysis of power transmissions towers[J].World Earthquake Engineering,2005,21(1):51-54(in Chinese).
[12]吴春秋，朱以文．大跨度结构TMD减震系统多点激励的地震随机响应分析[J]．地震工程与工程振动，2003，23(4)：131-135．Wu Chunqiu.Zhu Yiwen Random response analysis of span structures with TMD under multiple support excitation[J].Earthquake Engineering and Engineering Vibration,2003,23(4):131-135(in Chinese).
[13]范立础，王君杰，陈玮．非一致地震激励下大跨度斜拉桥的响应特征[J]．计算力学学报，2001，18(3)：358-363．Fan Lichu,Wang Junjie,Chert Wei.Response characteristics of longspan cable-stayed bridges under non-uniform seismic action[J].Chinese Journal of Computational Mechanics,2001,18(3):358-363(in Chinese).
[14]林家浩，张文首，钟万勰．大跨度结构随机地震响应[J]．固体力学学报，1991，12(4)：319-328．Lin Jiahao,Zhang Wenshou,Zhong Wanxie.Stochastic earthquake response of long span structures[J].Acta Mechanica Solida Sinica,1991,12(4):319-328(in Chinese).
[15]赵灿晖．大跨度桥梁地震响应分析中的非一致地震激励模型[J]．西南交通大学学报，2002，37(3)：236-240．Zhao Canhui.The asynchronous excitation model for the seismic response analysis of long-span bridges[J].Journal of Southwest Jiaotong University,2002,37(3):236-240(in Chinese).
[16]林家浩，钟万勰，张亚辉．大跨度结构抗震计算的随机振动方法[J]．建筑结构学报，2000，21(1)：29-36．Lin Jiahao,Zhong Wanxie,Zhang Yahui.Seismic analysis of long span structures by means of random vibration approach[J].Journal ofBuilding Structures,2000,21(1):29-36(in Chinese).
[17]张文首，李建俊，林家浩．多相位激励随机地震响应快速算法[J]．计算结构力学及其应用，1994，11(3)：241-247．Zhang Wenshou,Li Jianjun.Lin Jiahao.Fast algorithm of multiexcitation random seismic responses[J].Computational Structural Mechanics and Applications,1994,11(3):241-247(in Chinese).
[18]候鹏，彭世江．大跨度空间结构在地震行波作用下的响应[J]．工程结构，2003，23(5)：49-50．Hou Peng,Peng Shijiang.Response of the long-span spatial structure under earthquake traveling wave excitation[J].Engineering Structure,2003,23(5):49-50(in Chinese).
[19]岳茂光，王东升，李宏男，等．近断层地震动作用下输电塔-导线体系反应分析[J]．地震工程与工程振动，2005，25(4)：116-125．Yue Maoguang,Wang Dongsheng,Li Hongnan,et al.Response of power transmission tower-cable system subjected to near-fault ground motions[J].Earthquake Engineering and Engineering Vibration,2005.25(4):116-125(in Chinese).
[20]李建俊，林家浩，张文首，等．大跨度结构受多点随机地震激励的响应[J]．计算结构力学及其应用，1995，12(4)：445-452．Li Jianjun,Lin Jiahao,Zhang Wenshou,et al.Responses of long-span structures subjected to arbitrarily coherent multi-point stationary random seismic excitations[J].Computational Structural Mechanics and Applications,1995,12(4):445-452(in Chinese).
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