Failure probability analysis of transmission towers under ice-wind interaction

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (3) : 136-146.

LI Jiaxiang1,2,3, WANG Wenrui1, FU Xing2, JIANG Wenqiang3, DONG Zhiqian2

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Abstract

The icing disaster seriously threatens the safe operation of transmission lines. In the process of ice disaster, it is often accompanied by the effect of wind load. In order to improve the ability of transmission towers to resist icing disaster, this paper proposes a failure probability evaluation framework of transmission towers based on Jones icing model. Firstly, based on the meteorological station data of Chenzhou, Yongzhou and Shaoyang in Hunan Province, the superstation is established. On this basis, the Copula function is used to establish the joint probability distribution considering the correlation of ice thickness-wind speed and wind speed-wind direction. Finally, taking an actual transmission line as an example, the collapse failure probability of the tower under the coupling of ice wind load is calculated. The results show that the method proposed in this paper can effectively evaluate the failure probability of transmission towers under ice-wind coupling. After considering the correlation of ice thickness-wind speed and wind direction-wind speed, The calculation of failure probability of transmission towers is more scientific and reasonable. Affected by the probability of wind direction, the value of transmission towers failure probability may appear at any angle. This paper can provide reference for the design of transmission line ice disaster resistance.

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transmission tower / icing effect / wind load / fragility / failure probability

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LI Jiaxiang1,2,3, WANG Wenrui1, FU Xing2, JIANG Wenqiang3, DONG Zhiqian2. Failure probability analysis of transmission towers under ice-wind interaction[J]. Journal of Vibration and Shock, 2024, 43(3): 136-146

References

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