장대레일 좌굴확률을 이용한 혹서기 열차운행 조건에 관한 연구

초록

Recently, the rise of the rail temperature is accelerating further due to the global warming, and the track stability(buckling) problems that result from the axial force in the continuous welded rail(CWR) have become the most important issue. 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 KORAIL 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 uncertain. In this paper, a study on the operating conditions of the normal and high speed lines for the rail temperature is performed on the basis of the theoretical background suggested by precedent study.