Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Track-Structure Interaction Analysis of Fast Hardening Track on Railway Bridge Considering Effect of Anchor and Friction

앵커와 마찰의 영향을 고려한 교량상 급속경화궤도의 궤도-교량 상호작용해석

  • 조상현 (경희대학교 사회기반시스템공학과) ;
  • 이일화 (한국철도기술연구원 첨단궤도토목본부) ;
  • 정원석 (경희대학교 사회기반시스템공학과) ;
  • 이희영 (경희대학교 사회기반시스템공학과) ;
  • 이경찬 (한국철도기술연구원 첨단궤도토목본부)
  • Received : 2017.12.05
  • Accepted : 2017.12.28
  • Published : 2018.02.28
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Abstract

Ballast track requires constant maintenance work due to progress of track irregularity. Fast Hardening Track(FHT) has been developed to reduce the maintenance effort done by injecting fast hardening mortar in aged ballast to convert slab track. For the application of FHT to a railway bridge, post-installed anchors should be placed at center of the track segment to fix it on bridge. This paper presents track-bridge interaction analysis results with FHT considering stiffness and strength of post-installed anchor, age of FHT concrete and friction between FHT and bridge deck surface. Based on the analysis results, this study suggests when is good to install the anchors and allow normal operation of passing train.

자갈 궤도는 부설 후 궤도틀림이 발생하여 지속적인 유지 보수 작업이 필요하다. 이를 개선하기 위하여 기존의 자갈 궤도에 급속경화 모르타르를 주입하여 단시간 내에 콘크리트 궤도로 치환할 수 있는 급속경화궤도가 개발되었다. 교량에 부설되는 급속경화궤도는 교량과 궤도의 거동을 일치시키기 위하여 후설치 앵커를 궤도 세그먼트 중앙부에 시공한다. 본 논문은 앵커로 교량과 연결된 급속경화궤도와 교량의 궤도-교량 상호작용 해석을 수행하여 레일 및 앵커의 안전성을 검토하였다. 이때 앵커의 강성 및 강도, 급속경화 콘크리트의 재령, 급속경화궤도와 교량 사이의 마찰을 고려하였다. 이를 바탕으로 급속 경화궤도 부설 후 적절한 앵커의 설치시기 및 열차 정상운행 가능시기를 검토하였다.

Keywords

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