장대레일 궤도의 좌굴 위험도 분석

The characteristics of the continuous welded rail track is uncertainly varied by many influence factors such as; rail temperature, operating conditions of a train and maintenance of the track etc. Therefore, the uncertainty and randomness of the various track parameters that affect track buckling must reasonably consider. In other words, the required reliability should be assigned on the structure design and maintenance, using the allowable/target failure probability or reliability index that can stochastically evaluate instead of an abstract concept that is deterministic safety factor. In this study, the load and strength that is used in the limit state of the track buckling were handled to the rail temperature load and allowable buckling temperature respectively. Then, the buckling risk of the track was analyzed applying the permissible risk; allowable failure probability or reliability index.