텐션클램프의 초기체결 및 열차 주행에 의한 피로성능 분석

초록

Rail fastening system, which fixes the rail to the supports and transfers the train load and vibration to the roadbed, can be vulnerable to fatigue due to high level of initial stresses from clamping process and stress ranges by the repeated train load. In this study, fatigue performance was evaluated for tension clamp SKL15 in which fatigue failure was reported in an urban transit line as well as SKLB15 installed as replacement for damaged SKL15. For this purpose, the initial stresses from clamping and stress ranges during train operation at the fatigue-sensitive locations of the tension clamps were analyzed by laboratory tests and field measurements. The comparison of fatigue performance with SKL15 and SKLB15 was also performed by finite element analyses which supplement the experiments.