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Failure Patterns of Transmission Tower-Line System Caused by Landslide Events

Author

Listed:
  • Hong Yu

    (Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650233, China)

  • Hao Li

    (Electric Power Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650233, China)

  • Zhi-Qiang Zhang

    (Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510663, China)

  • Gui-Feng Zhang

    (Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510663, China)

  • Da-Hai Wang

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430074, China
    Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, China)

  • Hua-Dong Zheng

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430074, China
    Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, China)

Abstract

A transmission tower-line system consists of many towers and cables, which is a long-span structure. Due to topographical restrictions, the structure inevitably passes through wide areas prone to landslide hazards. The landslide causes the failure of the tower foundation and threatens the safety of the power transmission system. Therefore, the aim of this study was to investigate the collapse patterns of a transmission tower-line structure under landslides. The explicit analysis method was used to deal with the nonlinear dynamic response equations of the structure. To prove the effect of the landslides on the collapse patterns of the transmission tower-line structure, two foundation failure cases (Case 1 and Case 2) under landslides were considered. For each case, the displacement responses at tower tops and the progressive collapse behavior were analyzed, which illustrate that the failure patterns of the tower-line structure under landslides are dominated by two factors, i.e., the failure mode of the tower foundation and the pulling effect of cables. The overall tilting and hinge formation in the middle of the tower body are the main collapse patterns of the structure under Case 1 and Case 2, respectively. In addition, because of the pulling of cables, the collapse of one tower induced by the landslides always triggers the local failure of neighboring tower heads.

Suggested Citation

  • Hong Yu & Hao Li & Zhi-Qiang Zhang & Gui-Feng Zhang & Da-Hai Wang & Hua-Dong Zheng, 2022. "Failure Patterns of Transmission Tower-Line System Caused by Landslide Events," Energies, MDPI, vol. 15(19), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:19:p:7155-:d:928506
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    References listed on IDEAS

    as
    1. Junkuo Li & Fan Gao & Lihuan Wang & Yaning Ren & Chuncheng Liu & Aiquan Yang & Zhao Yan & Tao Jiang & Chengbo Li, 2022. "Collapse Mechanism of Transmission Tower Subjected to Strong Wind Load and Dynamic Response of Tower-Line System," Energies, MDPI, vol. 15(11), pages 1-18, May.
    2. Ruiyang Guan & Chuyuan Xiang & Zhidong Jia, 2022. "Anti-Wind Experiments and Damage Prediction of Transmission Tower under Typhoon Conditions in Coastal Areas," Energies, MDPI, vol. 15(9), pages 1-16, May.
    3. Dieter Rickenmann, 1999. "Empirical Relationships for Debris Flows," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 19(1), pages 47-77, January.
    Full references (including those not matched with items on IDEAS)

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