Fatigue Reliability and Remaining Fatigue Life of Existing Steel Rail-Road Bridges

by J. C. Shin, Choong-Nam Natl Univ, Republic of Korea,
H.-N. Cho, Choong-Nam Natl Univ, Republic of Korea,
D. I. Chang, Choong-Nam Natl Univ, Republic of Korea,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


This paper presents a fatigue reliability model for the reliability-based evaluation of remaining fatigue life of existing rail-road bridges. It is demonstrated that the simple fatigue reliability model based on the Weibull distribution of fatigue life can be extended by incorporating various effects due to the rate of the train-traffic increase and in-service inspection. The paper also suggests the system fatigue reliability analysis using the Stable Configuration Approach (SCA). The application of the proposed model to existing rail-road bridges based on field load tests show that it may be practically used for the assessment of fatigue reliability, remaining life, and in-service inspection scheduling of existing rail-road bridges.

Subject Headings: Fatigue life | Steel bridges | Railroad bridges | Fatigue tests | Existing buildings | Rail transportation | Structural models | Inspection

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