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Analysis of Wind-induced Response Limit State of Transmission Tower-line System

Li Zhengliang, Du Zifen, Zeng Jing, and Wang Zongkai
Civil Engineering, Chongqing University, Chongqing, China

Manuscript received March 10, 2020; revised April 16, 2020; accepted September 24, 2020;issue published February 19, 2021.

Abstract— In order to understand the failure mode and limit state of transmission tower components in the wind-induced vibration damage stage, this paper takes a 220kV transmission line in Guangdong as the research object. Through the analysis of the failure path of main materials under different wind speeds and the collapse state of tower line system, the following conclusions are drawn: 1. Under the action of wind load, the collapse of transmission tower mainly occurs in the middle of the tower. The tower line system is the most sensitive at 90 ° and the wind angle of 0 ° is the least sensitive. 2. Among the main members, the two ends of the main member supported by diaphragm and auxiliary member have weak restraint and the largest force, and yield first under load. 3. When the critical wind speed reaches 90 ° wind direction, the transmission tower collapses fastest and the tower body collapses due to elastic-plastic instability.

Index Terms— tower line system, dynamic analysis, failure path, collapse and failure

Cite: Li Zhengliang, Du Zifen, Zeng Jing, and Wang Zongkai, "Analysis of Wind-induced Response Limit State of Transmission Tower-line System," International Journal of Structural and Civil Engineering Research, Vol. 10, No. 1, pp. 26-30, February 2021. doi: 10.18178/ijscer.10.1.26-30

​Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.