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Journal of the Korean Society of Hazard Mitigation 2013;13(5):291-296.
Published online October 31, 2013.
장대레일 좌굴 신뢰도에 기반한 국내 고속열차 운행속도 제한의 신뢰도 평가
김명수, 배현웅, 최진유, 임남형
Reliability Evaluation of the Speed Reduction Scheme in Korean High-speed Train based on the Reliability of the CWR Buckling
Myoung Soo Kim, Hyun Ung Bae, Jin Yu Choi, Nam Hyoung Lim
Abstract
In order to prevent the track buckling in the hot summer and ensure the safety of the running train, as a part of the safety control plan for high-speed railway, the train speed restriction according to the rail temperature was introduced in 2004. However, the conceptual and theoretical background of train-speed restriction is unclear. In this paper, the buckling probability evaluation program( ProCWR) developed by this researchers was improved to take maximum and minimum buckling temperature into account for the calculation of allowable temperature. From the theoretical background of the international research and the buckling probability considering domestic railroad conditions, the validity and reliability of Korean high-speed train speed reduction scheme were investigated.
Key Words: Continuous welded rail; Track buckling; Buckling probability; Train speed
요지
혹서기에 궤도 좌굴을 방지하고 열차의 주행 안정성을 확보하기 위하여 국내 고속열차 구간에서는 2004년부터 고속철도 안전관리를 위해 레일온도에 따른 혹서기 열차 운행속도 제한을 시행하고 있다. 그러나 이에 대한 개념적, 이론적 배경이 불명확하다. 본 논문에서는 기존 본 연구진에 의해 개발된 장대레일 좌굴확률 평가프로그램에서 허용온도 계산 시 상한 및 하한좌굴온도를 고려하도록 개선하였으며, 국외 연구의 이론적 배경과 국내 선로조건이 고려된 좌굴확률을 근거로 국내 고속열차 운행속도 제한의 타당성과 신뢰성을 고찰하였다.
핵심용어: 장대레일; 궤도좌굴; 좌굴확률; 열차속도
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