KTX 및 HEMU430X 주행에 다른 고속철도 레일의 피로수명 평가

초록

In this study, the UIC60 thermit welded rails using the high-speed railway was performed by rail fatigue test, the prediction equation for bending stress of rail bottom was derived through train/track interaction analysis considered the surface irregularity of the rail. The equation was verified by comparing with the field test results, then used to predict the service life of thermit welded rails according to KTX and HEMU430X. The service life of rail considered rail grinding cycle was also predicted in ballast track and concrete track. Therefore, the proper maintenance and replacement period according to the axle load and maximum speed of KTX and HEMU430X, the replacement criteria of rail in high-speed railway were proposed.