Buckling Sensitivity of CWR Tracks according to the Characteristics of the Probability Distribution of the Lateral Ballast Resistance

도상횡저항력의 확률분포 특성에 따른 CWR 궤도의 좌굴 민감도

  • 윤경민 (충남대학교, 토목공학과) ;
  • 배현웅 (충남대학교, 토목공학과) ;
  • 강태구 (코레일, 오송고속철도시설사무소) ;
  • 김명수 (코레일, 부산경남본부 시설처) ;
  • 임남형 (충남대학교, 토목공학과)
  • Published : 2011.05.26

Abstract

The excessive axial load occurred in an immovable zone of continuous welded rail(CWR) tracks threatens the security of running trains due to the track buckling in extreme hot summer. The influence factors, such as rail temperature for compressive stress, ballast resistance for track stiffness and initial imperfection of track for tracks irregularity are uncertain track parameters that are randomly varied by climate conditions, operating conditions and maintenance of track etc. So, buckling of CWR tracks has very high uncertainties. Therefore, applying the probabilistic approach method is essential in order to rationally consider the uncertainty and randomness of the various parameters. In this study, buckling sensitivity analysis was carried out with respect to the characteristics of probability distribution of lateral ballast resistance using the buckling probability evaluation system of CWR tracks developed by our research team.

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Acknowledgement

Supported by : 국토해양부