多点激励下输电塔–线体系的侧向地震反应分析
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摘要
建立了输电塔–线体系三维有限元模型,并考虑了导(地)线的几何非线性特征;提出了依据现行设计规范模拟输电塔–线体系多点地震动时程;利用非线性时程分析方法研究了该体系在多点激励下的侧向反应特性,并与一致激励、仅考虑行波效应激励、仅考虑相干效应激励下的反应情况进行比较。结果表明,一致激励情况下输电塔–线体系不能得到最不利响应;多点激励增加了输电塔的地震响应,同时多点激励明显放大了导(地)线的侧向位移响应,这些均与行波波速和相干模型关系很大。由此得出结论:为得到输电塔–线体系的最不利响应,须准确估计行波波速,输电塔–线体系考虑多点激励的影响十分必要。
A three-dimensional finite element model of transmission tower-line system considering the geometric nonlinearity of transmission line was established, and the multiple support seismic time history of the transmission tower-line system was generated based on the Code for Design of Seismic of Electrical Installations, and the lateral response of the system was analyzed based upon nonlinearity time history integration method on multiple support excitations, and the comparison among multiple support excitation, uniform excitation, the excitation considering traveling-wave effect only and the excitation considering coherency effect only was carried out. The result indicates that uniform ground motion does not provide the most critical case for the response calculations, and the multiple support excitation increases the response of the transmission tower and has a significant effect on the lateral displacement of transmission lines, and those all depend on the traveling-wave velocity and coherency model. The conclusions are that a representative analysis of transmission tower-line system can be obtained from an accurate estimation of traveling-wave velocity, and considering the multiple support excitation effect is very necessary to the transmission tower-line system.
A three-dimensional finite element model of transmission tower-line system considering the geometric nonlinearity of transmission line was established, and the multiple support seismic time history of the transmission tower-line system was generated based on the Code for Design of Seismic of Electrical Installations, and the lateral response of the system was analyzed based upon nonlinearity time history integration method on multiple support excitations, and the comparison among multiple support excitation, uniform excitation, the excitation considering traveling-wave effect only and the excitation considering coherency effect only was carried out. The result indicates that uniform ground motion does not provide the most critical case for the response calculations, and the multiple support excitation increases the response of the transmission tower and has a significant effect on the lateral displacement of transmission lines, and those all depend on the traveling-wave velocity and coherency model. The conclusions are that a representative analysis of transmission tower-line system can be obtained from an accurate estimation of traveling-wave velocity, and considering the multiple support excitation effect is very necessary to the transmission tower-line system.
引文
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[11]邓洪洲,陈晓明,屠海明,等.江阴大跨越输电塔模型实验研究[J].建筑结构学报,2001,22(6):31-35.Deng Hongzhou,Chen Xiaoming,Tu Haiming,et al.Experimental study on model of Jiangyin long span transmission tower[J].Journal of Building Structures,2001,22(6):31-35(in Chinese).
[12]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[13]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.
[14]Wilson E L.Three dimensional static and dynamic analysis of structures:a physical approach with emphasis on earthquake engineering[Z].Berkley,California:Computers and Structures,Inc,2002.
[15]Clough R W,Penzien J.Dynamics of structures[M].2nd edition.New York:McGraw-Hill,Inc,1993.
[16]潘晓东.非平稳随机地震下堤坝非线性有效应力动力响应可靠度分析[D].杭州:浙江大学,2004.Pan Xiaodong.Nonlinear probabilistic dynamic response analysis of effective stress of earth dams under non-stationary seismic loadings[D].Hangzhou:Zhejiang University,2004(in Chinese).
[17]Hao H,Oliveira C S,Penzien J.Multiple-station ground motion processing and simulation based on smart-1 array data[J].Nuclear Engineering and Design,1989,111(3):293-310.
[18]Hindy A,ANovak M.Pipeline response to random ground motion[J].Journal of Engineering Mechanics,ASCE,1980,106(2):339-360.
[19]Housner G W,Jennings P C.Generation of artificial earthquake[J].Journal of the Engineering Mechanics Division,ASCE,1964,90(1):113-150.
[20]Trujillo D M.A new approach to the integration of accelerometer data[J].Earthquake Engineering and Structural Dynamics,1982,10(4):529-535.
[2]屈靖,郭剑波.“九五”期间我国电网稳定事故统计分析[J].电网技术,2004,28(21):60-62,68.Qu Jing,Guo Jianbo.Statistics and analysis of faults in main domestic power systems from1996to2000[J].Power System Technology,2004,28(21):60-62,68(in Chinese).
[3]李宏男,胡大柱,黄连状.地震作用下输电塔体系塑性极限状态分析[J].中国电机工程学报,2006,26(24):192-199.Li Hongnan,Hu Dazhu,Huang Lianzhuang.Plastic limit analysis of the transmission tower system subjected to earthquake action[J].Proceedings of the CSEE,2006,26(24):192-199(in Chinese).
[4]孙才新,蒋兴良,熊启新,等.导线覆冰及其干湿增长临界条件分析[J].中国电机工程学报,2003,23(3):141-145.Sun Caixin,Jiang Xingliang,Xiong Qixin,et al.Analysis of critical icing conditions of conductor and wet-dry growth[J].Proceedings of the CSEE,2003,23(3):141-145(in Chinese).
[5]李宏男.结构多维抗震理论[M].北京:科学出版社,2006.
[6]潘旦光,楼梦麟,范立础.多点输入下大跨度结构地震反应分析研究现状[J].同济大学学报,2001,29(10):1213-1219.Pan Danguang,Lou Menglin,Fan Lichu.Status of seismic response analysis of long-span structures under multiple support excitations[J].Journal of Tongji University,2001,29(10):1213-1219(in Chinese).
[7]屈铁军,王前信.多点输入地震反应分析研究的进展[J].世界地震工程,1993,9(3):30-36.Qu Tiejun,Wang Qianxin.A progress in research on seismic responseanalysis under multi-supports excitation[J].World Information on Earthquake Engineering,1993,9(3):30-36(in Chinese).
[8]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 Maoguang,Li Hongnan,Wang Dongsheng,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(in Chinese).
[9]中华人民共和国电力工业部.GB50260—1996电力设施抗震设计规范[S].北京:中国计划出版社,1996.
[10]张琳琳.随机风场研究与高耸、高层结构抗风可靠性分析[D].上海:同济大学,2006.Zhang Linlin.Research on wind stochastic field and analysis of dynamic reliability for high-rise building with wind loading[D].Shanghai:Tongji University,2006(in Chinese).
[11]邓洪洲,陈晓明,屠海明,等.江阴大跨越输电塔模型实验研究[J].建筑结构学报,2001,22(6):31-35.Deng Hongzhou,Chen Xiaoming,Tu Haiming,et al.Experimental study on model of Jiangyin long span transmission tower[J].Journal of Building Structures,2001,22(6):31-35(in Chinese).
[12]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[13]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.
[14]Wilson E L.Three dimensional static and dynamic analysis of structures:a physical approach with emphasis on earthquake engineering[Z].Berkley,California:Computers and Structures,Inc,2002.
[15]Clough R W,Penzien J.Dynamics of structures[M].2nd edition.New York:McGraw-Hill,Inc,1993.
[16]潘晓东.非平稳随机地震下堤坝非线性有效应力动力响应可靠度分析[D].杭州:浙江大学,2004.Pan Xiaodong.Nonlinear probabilistic dynamic response analysis of effective stress of earth dams under non-stationary seismic loadings[D].Hangzhou:Zhejiang University,2004(in Chinese).
[17]Hao H,Oliveira C S,Penzien J.Multiple-station ground motion processing and simulation based on smart-1 array data[J].Nuclear Engineering and Design,1989,111(3):293-310.
[18]Hindy A,ANovak M.Pipeline response to random ground motion[J].Journal of Engineering Mechanics,ASCE,1980,106(2):339-360.
[19]Housner G W,Jennings P C.Generation of artificial earthquake[J].Journal of the Engineering Mechanics Division,ASCE,1964,90(1):113-150.
[20]Trujillo D M.A new approach to the integration of accelerometer data[J].Earthquake Engineering and Structural Dynamics,1982,10(4):529-535.
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