Failure probability analysis of transmission towers under ice-wind interaction

被引：0
|
作者：
Li J. [1 ,2 ,3 ]
Wang W. [1 ]
Fu X. [2 ]
Jiang W. [3 ]
Dong Z. [2 ]
机构：
[1] School of Resources and Civil Engineering, Northeastern University, Shenyang
[2] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian
[3] Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 03期
关键词：
failure probability; fragility; icing effect; transmission tower; wind load;
D O I：
10.13465/j.cnki.jvs.2024.03.016
中图分类号：
学科分类号：
摘要：
Icing disaster seriously threatens safe operation of transmission lines. In process of ice disaster, wind loads are often accompanied. Here, to improve the ability of transmission tower to withstand icing disaster, a failure probability assessment framework for transmission tower was proposed based on Jones icing model. Firstly, a super-station was established based on data from meteorological stations in 3 cities of Chenzhou, Yongzhou and Shaoyang, Hunan Province. Then, a joint probability distribution considering correlations of ice thickness-wind speed and wind speed-wind direction was established using Copula function. Finally, an actual transmission line was taken as an example to calculate the failure probability of this line' s towers collapse state under interaction of ice and wind loads. The results showed that the proposed method can effectively evaluate the failure probability of transmission towers under interaction of ice and wind; after considering correlations of ice thickness-wind speed and wind speed-wind direction, the failure probability calculation of transmission towers is more scientific and reasonable; due to effects of wind direction probability, the angle at which the maximum value of transmission tower failure probability occurs is not fixed; the study results can provide a reference for anti-ice disaster design of transmission lines. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：136 / 146
页数：10
相关论文
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