Nonlinear Buckling Analysis of Collapsed Steel Tower for 220KV Guajing Iced Transmission Line

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (5) : 111-114.

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Nonlinear Buckling Analysis of Collapsed Steel Tower for 220KV Guajing Iced Transmission Line

Li Xue 1 Li Hong-nan 1 　Huang Lian-zhuang 2

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Abstract

In this paper, based on the principle of collapsed steel tower design for Guajing transmission line, the finite element model of multi-tower-line coupled system has been established according to the original data of engineering. The curve of ice increasing with time has been given according to the data of icing record. Considering the high deference, ice increasing, asymmetry between ices of conductors and wind load, nonlinear buckling analysis of transmission tower-line system under ice load and wind load has been carried out. The ultimate load of tower structure has been studied by using nonlinear buckling analysis and the cause of the tower falling down is analyzed in this paper. It can be concluded that wind load and unbalanced tension caused by overload and asymmetry between ices of conductors are the main reasons why the steel towers fell down, and technical code of design overhead transmission line in heavy icing area needs to be modified.

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transmission tower-line system / ice / nonlinear buckling analysis / collapsed steel tower

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Li Xue Li Hong-nan 　Huang Lian-zhuang . Nonlinear Buckling Analysis of Collapsed Steel Tower for 220KV Guajing Iced Transmission Line[J]. Journal of Vibration and Shock, 2009, 28(5): 111-114