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Corrosion Fatigue Reliability-Based Life Cycle Cost Analysis of High-Speed Railway Steel Bridges  

Cho, Hyo-Nam (한양대학교 건설환경시스템공학과)
Jeon, Hong-Min (금호건설 기술연구소)
Sun, Jong-Wan (한양대학교 토목공학과)
Youn, Man-Keun (한양대학교 토목공학과, 삼성물산 토목사업본부)
Publication Information
Journal of the Korean Society for Railway / v.11, no.1, 2008 , pp. 107-113 More about this Journal
Abstract
As it recently appears that LCC (Life Cycle Cost) analysis may be considered as an essential method for economic evaluation of infrastructures. Many researches have been made to assess LCC of each facility based on reasonable methods. However, expected maintenance repair cost must be reasonably estimated to enhance the reliability of LCC analysis through systematic and rational methods. This study is intended to propose a rational approach to reliability-based LCC analysis of high-speed railway steel bridges considering lifetime corrosion and fatigue damage. However in Korea, since high speed railway steel bridges are only recently constructed, no direct statistical data are available for the account of the maintenance cost and thus their maintenance characteristics are not clear yet. In this paper, for the assessment of expected maintenance/repair cost, the fatigue system reliability analysis incorporating the corrosion effect is proposed by considering the corrosion and fatigue damage using measured data of high speed railway steel bridges. A model proposed by Rahgozar, of at for fatigue notch factor considering the corrosion effect is used in order to incorporate the corrosion effect into the fatigue strength reduction and S-N curve. Finally, the effectiveness of LCC model proposed for high-speed railway steel bridges is demonstrated by a numerical example.
Keywords
System Reliability; LCC; S-N Curve; High Speed Railway Steel Bridges;
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