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http://dx.doi.org/10.7782/JKSR.2014.17.3.193

The Fatigue Life Evaluation of Continuous Welded Rail on a Concrete Track in an Urban Railway  

Kong, Sung-Yong (Department of Railway Construction, Graduate School of Railway, Seoul National University of Science & Technology)
Sung, Deok-Yong (Department of Civil & Railroad Engineering, Daewon University College)
Publication Information
Journal of the Korean Society for Railway / v.17, no.3, 2014 , pp. 193-200 More about this Journal
Abstract
In this study, fatigue tests on existing continuous welded rail (CWR) on a concrete track were carried out. Based on the test results, a S-N curve expressing the remaining life of the CWR at a fracture probability of 50% was obtained using weighted probit analysis suitable for small-sample fatigue data sets. As rails had different histories in terms of accumulated passing tonnage, the test data were corrected to average out the accumulated passing tonnage. The remaining service life for the CWR on the concrete track in an urban railway was estimated using the prediction equation for the bending stress of rail developed in the past to estimate rail base bending stress and taking the surface irregularities into consideration. Estimating the remaining service life of the CWR in an urban railway showed that the rail replacement period could be extended over 200MGT. In addition, comparing the concrete track to the ballast track, the fatigue life of rail was analyzed as approximately 300MGT higher than. Therefore, the rail replacement criteria needs to distinguish between the ballast track and the concrete track, and not the criteria needs to be changed as a target for the maintenance, although it is necessary to remove longitudinal rail surface irregularities at welds by grinding.
Keywords
Urban railway; Concrete track; Continuous welded rail; Fatigue life; Periodic replacement;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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