Structural Engineering and Mechanics

  • 제76권2호
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  • Pages.207-222
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Running safety of metro train over a high-pier bridge subjected to fluctuating crosswind in mountain city

  • Zhang, Yunfei (School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University) ;
  • Li, Jun (School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University) ;
  • Chen, Zhaowei (School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University) ;
  • Xu, Xiangyang (School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University)
  • 투고 : 2019.01.27
  • 심사 : 2019.12.30
  • 발행 : 2020.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

Due to the rugged terrain, metro lines in mountain city across numerous wide rivers and deep valleys, resulting in instability of high-pier bridge and insecurity of metro train subjected to fluctuating crosswind. To ensure the safe operation in metro lines in mountain cities, running safety of the metro train over the high-pier bridge under crosswind is analyzed in this paper. Firstly, the dynamic model of the wind-train-bridge (WTB) system is built, in which the speed-up effect of crosswind is fully considered. On the basis of time domain analysis, the basic characteristics of the WTB system with high-pier are analyzed. Afterwards, the dynamic responses varies with train speed and wind speed are calculated, and the safety zone of metro train over a high-pier bridge subjected to fluctuating crosswind in mountain city is determined. The results indicate that, fluctuating crosswind triggers drastic vibration to the metro train and high-pier bridges, which in turn causes running instability of the train. For this reason, the corresponding safety zone for metro train running on the high-pier is proposed, and the metro traffic on the high-pier bridge should be closed as the mean wind speed of standard height reaches 9 m/s (15.6 m/s for the train).

키워드

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피인용 문헌

  1. Crosswind Stability of Metro Train on a High-Pier Viaduct under Spatial Gust Environment in Mountain City vol.25, pp.12, 2021, https://doi.org/10.1007/s12205-021-0706-5