Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Study of Characteristics of Longitudinal Resistance Behavior of Fasteners in Concrete Track on Bridges

교량 상 콘크리트궤도 체결장치의 종저항 거동특성에 대한 실험적 연구

  • Yun, Kyung-Min (Chungnam National University Rail Research Institute) ;
  • Park, Beom-Ho (Department of Civil Engineering, Chungnam National University) ;
  • Min, Kyung-Hwan (Chungnam National University Rail Research Institute) ;
  • Lim, Nam-Hyoung (Department of Civil Engineering, Chungnam National University)
  • Received : 2016.10.17
  • Accepted : 2016.10.27
  • Published : 2016.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

CWR (continuous welded rail) tracks on high-speed railway bridges have much more complicated axial force distributions caused by track-bridge interaction than those behaviors on embankments, and additional problems caused by track-structure interaction with the axial force of the CWR. In order to analyze and limit other physical phenomena caused by track-bridge interaction, a design guideline (KR C-08080, longitudinal track-bridge interaction analysis) is used when designing CWR track on bridges. Domestic analysis and design methods for track-bridge interaction follow the UIC 774-3R, and they suggest conservative methods and deterministic properties. Recently, many studies analyzing the methods of track-bridge interaction considering the loading history are being carried out; however, there has been insufficient studies of the variation of the resistance properties with a consideration of the actual loading history. In this study, the performances of rail fastening systems used for concrete track on bridges were tested and analyzed while considering the loading history. For this purpose, longitudinal and vertical loading combinations, applied in order to simulate the practical conditions and resistance characteristics (stiffness and elastic limit displacement), are analyzed through the experimental results. Also, a comparison study was conducted with the properties in the KR Code.

고속철도 교량 상에 설치되는 장대레일은 궤도와 교량의 상호작용에 의해 레일에 발생하는 축력분포가 토노반상에 비해 매우 복잡하며, 교량에 가해지는 외력의 영향이 추가로 발생되어 장대레일 축력과 함께 추가적인 문제를 야기한다. 이상과 같은 궤도-교량 상호작용에 의해 발생되는 각종 물리적인 현상을 해석하고 제한하기 위해서 국내에서는 교량 상 궤도 설계 시 설계지침(KR C-08080, 궤도-교량 종방향 상호작용 해석)을 운영하고 있다. 국내의 궤도/교량 상호작용 해석 및 설계 기술은 유럽의 UIC 774-3R에서 제시된 해석방법과 기준을 적용하며, 보수적인 해석방법과 결정론적인 단일 물성치를 제시하고 있다. 최근 하중 이력을 고려한 궤도-교량 상호작용 해석기법에 대한 연구가 활발하게 진행되고 있으나, 하중이력에 의한 저항물성치 변화에 대한 연구는 미흡한 실정이다. 본 연구에서는 교량 상 콘크리트궤도에 사용되는 레일체결장치를 대상으로 하중이력에 대한 거동특성을 분석하였다. 이를 위하여 현장조건을 모사하여 종방향 하중과 수직하중을 재하하였으며, 실험결과 분석을 통하여 체결장치별 저항물성치(저항력, 탄성한계변위)를 제시하였다. 또한 코드에서 제시하는 물성치와 비교연구를 수행하였다.

Keywords

References

  1. Korea Rail Network Authority (2014) Track-Bridge Longitudinal Interaction Analysis (in Korean), KR C-08080.
  2. P. Ruge, Birk, C. (2007) Longitudinal force in continuously welded rails on bridge decks due to nonlinear track-bridge interaction, Computers and Structures, 85, pp. 458-475. https://doi.org/10.1016/j.compstruc.2006.09.008
  3. K.M. Yun, J.Y. Choi, J.O. Lee, N.H. Lim (2012) Modification of the conventional method for the track-bridge interaction, Applied Mechanics and Materials, 204-208, pp. 1988-1991. https://doi.org/10.4028/www.scientific.net/AMM.204-208.1988
  4. J. Zhang, D.J. Wu, Q. Li (2015) Loading history based track-bridge interaction analysis with experimental fastener resistance, Engineering and Structures, 85, pp. 62-73.
  5. D.N. Kim (2012) Track-Bridge Longitudinal Interaction Considering Loading Sequence (in Korean), Thesis of the Degree of the Mater of Engineering, Korea University.
  6. S.C. Yang, S.Y. Jang (2016) Track-bridge interaction analysis using interface elements adaptive to various loading cases, Journal of Bridge Engineering, ASCE, BE. 1943-5592. 0000916. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000916
  7. B.H. Joen (2016) Longitudinal Interaction Response of the Concrete Track on Bridges Using Longitudinal Behavior Characteristics of Rail Fastening Systems (in Korean), Thesis for the Degree of Master of Engineering, Chungnam National University.
  8. International Union of Railways (2001) Track/bridge Interaction Recommendations for Calculations, UIC Code 774-3R.
  9. K.M. Yun (2016) Modified Design Method of CWR Tracks on Railway Bridges based on the Track-Bridge Interaction, Thesis for the Degree of Doctor of Philosophy, Chungnam National University.
  10. Korean Railway Standards (2015) Rail Fastening System, KRS TR 0014-15R, Korea Railroad Research Institute.
  11. Lusas Inc. (2006) LUSAS User's manual.