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Evaluation on Allowable Vehicle Speed Based on Safety of Track and Railway Bridge

궤도 및 교량 안전성을 고려한 열차 증속가능 속도대역 평가

  • Bahng, Eun Young (Department of Railroad Construction & Safety Engineering, Dongyang University)
  • 방은영 (동양대학교 철도건설안전공학과)
  • Received : 2018.03.28
  • Accepted : 2018.04.10
  • Published : 2018.04.30

Abstract

In this study, the track-bridge interaction analysis was performed using an analytical model considering the track structure, thereby taking into account the linear conditions (R=650 m, cant variation $160{\pm}60mm$) and the dynamic characteristics of the bridge. As a result of the study, the allowable speed on the example bridge considered was calculated at 200 km/h based on vertical deflection, vertical acceleration, and irregularity in longitudinal level, but was also evaluated at 170km/h based on the coefficient of derailment, wheel load reduction, and lateral displacement of the rail head. It is considered desirable to set the speed 170km/h to the speed limit in order to secure the safety of both the bridge and the track. It is judged that there will be no problems with ensuring rail protection and train stability in the speed band.

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