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Title |
Evaluation of Maintenance Quantity and Life Cycle Costs of Railway Track Considering Evolution of Rail Fatigue Damage and Ballast Settlement According to Track Quality Level
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Authors |
최준혁(Jun-Hyuck Choi) ; 장승엽(Seung-Yup Jang) ; 유승원(Seung-Won You) ; 김도엽(Do-Yeop Kim) ; 김형조(Hyung-Jo Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.4.37 |
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Keywords |
철도 궤도; 수명주기비용 (LCC); 유지보수; 피로; 손상 Railway track; Life-Cycle Cost (LCC); Maintenance; Fatigue; Damage |
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Abstract |
This study proposes a track maintenance quantity estimation model that considers evolution of rail fatigue damage and ballast settlement based on actual maintenance data from the Gyeongbu high-speed railway, and revises the existing life cycle cost (LCC) model for railway track. Using this model, maintenance quantities and life cycle costs based on different track quality levels are evaluated and discussed. According to the results, it is confirmed that applying the track maintenance quantity estimation model that accounts for rail fatigue damage and ballast settlement allows us to reasonably estimate maintenance costs close to the actual data. The track quality coefficient significantly influences both rail and ballast maintenance quantities, with ballast maintenance having a greater impact than rail maintenance. Additionally, as train speed increases, both rail and ballast maintenance quantities rise. Moreover, a higher track quality coefficient leads to a steeper increase in maintenance quantities with increasing train speed. Consequently, LCC also exhibits a faster growth rate over time with higher track quality coefficients and faster train speeds, resulting from an increased proportion of maintenance costs.
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