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下击暴流作用下输电铁塔荷载取值及承载性能分析

DOI: 10.13334/j.0258-8013.pcsee.2014.24.023, PP. 4179-4186

Keywords: 下击暴流,风速剖面,输电铁塔,荷载,破坏模式

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Abstract:

下击暴流会给输电线路造成巨大危害,已引发生多起倒塔事故。基于ASCE关于高强度风区域输电线路设计的相关规定,综合考虑下击暴流尺度特征和输电线路经济性设计原则,提出了下击暴流作用下输电线路的设计荷载取值建议。采用Vicroy风速剖面模型,计算得到了内陆和沿海地区典型输电铁塔在下击暴流作用下的风荷载。建立了输电铁塔空间有限元分析模型,通过结构受力分析,确定了输电铁塔在下击暴流作用下的受力特征和破坏模式。结果表明:下击暴流作用下,输电铁塔杆件应力主要由45°大风控制。对于设计风速较低的内陆地区,尽管铁塔结构高度不在下击暴流最高风速区域,下击暴流风荷载明显高于常规风,塔腿横隔面以上主材会首先发生破坏;对于设计风速较高的沿海地区,下击暴流风荷载低于常规风,下击暴流在铁塔设计中不起控制作用。

References

[1]  柳国环,李宏男.高压输电塔-线体系风致动力响应分析与优化控制[J].中国电机工程学报,2008,28(19):131-137.Liu Guohuan,Li Hongnan.Rain-wind-induced dynamic model for transmission tower system[J].Proceedings of the CSEE,2008,28(19):131-137(in Chinese).
[2]  肖正直,李正良,汪之松,等.1000kV汉江大跨越塔线体系风洞实验与风振响应分析[J].中国电机工程学报,2009,29(34):84-89.Xiao Zhengzhi,Li Zhengliang,Wang Zhisong,et al.Wind tunnel tests and wind-induced responses analysis of 1000kV Hanjiang long span transmission line system [J].Proceedings of the CSEE,2009,29(34):84-89(in Chinese).
[3]  American Society of Civil Engineers.ASCE manuals and reports on engineering practice No.74[S].Reston:American Society of Civil Engineers,2009.
[4]  Savory E,Parke G A R,Zeinoddini M,et al.Modelling of tornado and microburst-induced wind loading and failure of a lattice transmission tower[J].Engineering Structures,2001(23):365-375.
[5]  谢强,张勇,李杰.华东电网500kV任上5237线飑线风致倒塔事故调查分析[J].电网技术,2006,30(10):59-63.Xie Qiang,Zhang Yong,Li Jie.Investigation on tower collapses of 500kV RenShang 5237 transmission line caused by downburst[J].Power System Technology,2006,30(10):59-63(in Chinese).
[6]  Holmes J D,Baker C J,English E C,et al.Wind structure and codification[J].Wind and Structures,2005,8(4):235-250.
[7]  Holmes J D.Recent developments in the specification of wind loads on transmission lines[J].Journal of Wind & Engineering,2008,5(1):8-18.
[8]  国家能源局.DL/T 5154-2012,架空输电线路杆塔结构设计技术规定[S].北京:中国计划出版社,2012.National Energy Administration. DL/T 5154-2012,Technical code for the design of tower and pole structures of overhead transmission lines[S].Beijing:China Planning Press,2012(in Chinese).
[9]  International Electrotechnical Commision.IEC 60826,Design criteria of overhead transmission lines [S].Geneva:International Electrotechnical Commision,2003.
[10]  British Standards Institution.BS-8100:1986,Lattice tower and masts-Part1:Code of practice for loading [S].London:British Standards Institution,2005.
[11]  Standards Australia Limited/Standards New Zealand.Australia/New Zealand Standard,AS/NZS 7000:2010,Overhead line design-detailed procedures [S].Sydeny:SAI Global Limited,2010.
[12]  瞿伟廉,梁政平,王力争,等.下击暴流的特征及其对输电线塔风致倒塌的影响[J].地震工程与工程振动,2010,30(6):120-126.Qu Weilian,Liang Zhengping,Wang Lizheng,et al.Downburst’s characteristics and its effect on wind-induced collapse of transmission tower[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(6):120-126(in Chinese).
[13]  潘峰,谢芳,邢月龙,等.1000kV特高压钢管构架雷暴冲击风致振动响应研究[J].空气动力学学报,2012,30(4):502-507.Pan Feng,Xie Fang,Xing Yuelong,et al.Wind-induced dynamic response of large steel tube frame for 1000kV UHV transmission lines to thunderstorm downbursts [J].Acta Aerodynamica Sinica,2012,30(4):502-507(in Chinese).
[14]  李春祥,刘哲晨,申建红,等.土木工程下击暴流风速数值模拟的研究[J].振动与冲击,2010,29(12):49-54.Li Chunxiang,Liu Zhechen,Shen Jianhong,et al.Numerical simulations of downburst wind speeds in civil engineering[J].Journal of Vibration and Shock,2010,29(12):49-54(in Chinese).
[15]  李春祥,李锦华,于志强.输电塔线体系抗风设计理论与发展[J].振动与冲击,2009,28(10):15-25.Li Chunxiang,Li Jinhua,Yu Zhiqiang.A review of wind-resistant design theories of transmission tower-line system[J].Journal of Vibration and Shock,2009,28(10):15-25(in Chinese).
[16]  Shehata A Y,El Damattya A A,Savory E.Finite element modeling of transmission line under downburst wind loading[J].Finite Elements in Analysis and Design,2005(42):71-89.
[17]  王昕,楼文娟,徐伟.雷暴冲击风对输电塔的作用特征[J].华中科技大学学报(城市科学版),2008,25(4):10-14.Wang Xin,Lou Wenjuan,Xu Wei.Features of thunderstorm downburst on transmission tower [J].Journal of HUST(Urban Science Edition),2008,25(4):10-14(in Chinese).
[18]  王锦文,瞿伟廉.下击暴流风作用下输电“线-塔”结构倒塌破坏的特征分析[C]//第十四届全国结构风工程学术会议.北京:中国土木工程学会,2009:395-400. Wang Jinwen,Qu Weilian. Analysis on failure characteristics of transmission tower-line system under downburst[C]//The 14th National Conference on Structural Wind Engineering.Beijing:China Civil Engineering Society,2009:395-400(in Chinese).
[19]  瞿伟廉,吉柏锋.下击暴流的形成与扩散及其对输电线塔的灾害作用[M].北京:科学出版社,2013:228-258.Qu Weilian,Ji Bofeng. Formation and diffusion of downburst and disaster effect on transmission lines[M]. Beijing:Science Press,2013:228-258(in Chinese).
[20]  Vicroy D D.A simple,analytical,asymmetric microburst model for downdraft estimation[R].Washington D.C.:NASA Technical Memorandum 104053,1991.
[21]  Chen Lizhong,Letchford C W.A deterministic–stochastic hybrid model of downbursts and its impact on a cantilevered structure[J].Engineering Structures,2004(26):619-629.
[22]  Holmes J D,Oliver S E.An empirical model of a downburst[J].Engineering Structures,2000(22):1167-1172.
[23]  Oseguera R M,Bowles R L.A simple analytic 3-dimensional downburst model based on boundary layer stagnation flow[R].Washington D.C.:NASA Technical Memorandum 100632,1988.
[24]  Wood G S,Kwok K C S.An empirically derived estimate for the mean velocity profile of a thunderstorm downburst [C]//Proceedings of the 7th AWES Workshop.Aukland:Australian Wind Engineering Society,1998:1-4.
[25]  Lou Wenjuan,Wang Xin,Jiang Ying.Wind-induced responses of a high-rise transmission tower to thunderstorm downbursts[C]//The Seventh Asia-Pacific Conference on Wind Engineering.Taipei:Chinese Taiwan Association for Wind Engineering and Wind Engineering Research Center of Tamkang University,2009:1-8.
[26]  黄本才,汪丛军.结构抗风分析原理及应用[M].上海:同济大学出版社,2008:29-30. Huang Bencai,Wang Congjun. The wind resistance analysis principle and application in structures[M]. Shanghai:Tongji University Press,2008:29-30(in Chinese).

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