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영종대교 강직결 궤도구조의 동적거동에 관한 연구

Dynamic Behavior of Direct Fixation Track on Yeongjong Grand Bridge

  • 최정열 (동양대학교 건설공학과) ;
  • 이규용 (공항철도(주) 기술본부) ;
  • 정지승 (동양대학교 건설공학과) ;
  • 안대희 (동양대학교 건설공학과) ;
  • 김수형 (동양대학교 건설공학과)
  • 투고 : 2020.02.19
  • 심사 : 2020.08.11
  • 발행 : 2020.08.31

초록

본 연구에서는 영종대교를 구성하고 있는 교량형식(트러스교, 현수교)별 열차종류(AREX, AREX Express, KTX, KTX-Sancheon) 및 열차속도가 강직결 궤도구조의 동적거동에 미치는 영향을 분석하고자 현장측정을 수행하였다. 현장측정결과를 바탕으로 궤도충격계수 및 열차주행안정성(탈선계수, 윤중감소율, 레일두부횡변위)을 국내, 외 관련기준 및 법규와의 비교하여 영종대교 교량상 강직결 궤도구조의 동적거동에 영향을 미치는 열차하중 및 속도의 효과를 분석하였다. 연구결과, 영종대교 교량형식별 궤도의 동적거동의 차이는 뚜렷하지 않으나 열차하중의 크기에 보다 직접적인 영향을 받는 것으로 분석되었다. 따라서 향후 열차속도 증가에 따른 궤도충격계수의 증가와 이에 따른 궤도부담력의 증가수준을 감안한 영종대교 강직결 궤도구조의 보강방안 수립이 필요할 것으로 판단된다.

In this study, field measurements were performed to analyze the effects of train types (AREX, AREX Express, KTX, KTX-Sancheon) and train speeds on the dynamic behavior of the direct fixation track structure on Yeongjong grand bridge by bridge type (truss bridge, suspension bridge). Based on field measurement results, the track impact factor and train running stability (coefficient of derailment, Rate of wheel load reduction, lateral displacement of rail head) are compared with domestic and foreign standards and regulations to influence the dynamic behavior of direct fixation track. As a result, the differences in the dynamic behavior of the direct fixation tracks by the type of bridges of Yeongjong bridge are not significant, but it was analyzed that these were more directly affected by the magnitude of the train load. Therefore, it is necessary to establish the reinforcement plan of the direct fixation track structure on Yeongjong grand bridge in consideration of the increase of the track impact factor and dynamic track force.

키워드

참고문헌

  1. J.Y. Choi, J.S. Chung, J.H. Kim, K.Y. Lee, S.G. Lee, "Evaluation of Behavior of Direct Fixation Track and Track Girder Ends on Yeongjong Grand Bridge", Journal of the Korean Society of Safety, Vol. 31, No.6, pp.45-51, 2016 https://doi.org/10.14346/JKOSOS.2016.31.6.45
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