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Wind and Structures Volume 34, Number 4, April 2022 , pages 335-353 DOI: https://doi.org/10.12989/was.2022.34.4.335 |
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Dynamic response of an overhead transmission tower–line system to high-speed train-induced wind |
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Meng Zhang, Ying Liu, Hao Liu and Guifeng Zhao
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| Abstract | ||
| The current work numerically investigates the transient force and dynamic response of an overhead transmission tower–line structure caused by the passage of a high-speed train (HST). Taking the CRH2C HST and an overhead transmission tower–line structure as the research objects, both an HST–transmission line fluid numerical model and a transmission tower–line structure finite element model are established and validated through comparison with experimental and theoretical data. The transient force and typical dynamic response of the overhead transmission tower–line structure due to HST-induced wind are analyzed. The results show that when the train passes through the overhead transmission tower–line structure, the extreme force on the transmission line is related to the train speed with a significant quadratic function relationship. Once the relative distance from the track is more than 15 m, the train-induced force is small enough to be ignored. The extreme value of the mid-span dynamic response of the transmission line is related to the train speed and span length with a significant linear functional relationship. | ||
| Key Words | ||
| dynamic response; High-speed train (HST); numerical simulation; overhead transmission tower–line structure; train-induced wind force | ||
| Address | ||
| Meng Zhang:School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China Ying Liu:School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China Hao Liu:1)School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China 2)China Tower Co., Ltd. Luohe Branch, Luohe, 462000, China Guifeng Zhao:School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China | ||