Buckling Probability of Continuous Welded Rail Tracks

초록

The buckling behavior of the Continuous Welded Rail (CWR) track is directly affected by the various parameters such as stiffness and geometry of track panel, ballast resistance, rail temperature, initial imperfection, and wheel load. Until now, CWR tracks were managed by the deterministic approach despite these influence factors are having the nature of random variables. So, the design method and existing management process to prevent the track buckling can be very non-economic since the value of these influence factors to calculate the track buckling strength are selected by considering the worst track condition. Therefore, applying the probabilistic approach method is essential to rationally consider uncertainty and randomness of the various parameters that affect the track buckling. In this study, buckling probability evaluation process is proposed considering the randomness of the rail temperature and ballast resistance.