期刊
STRUCTURAL SAFETY
卷 97, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.strusafe.2022.102229
关键词
Fatigue safety factor; Bridges; Model uncertainty; Dynamic amplification; Weigh in motion; Random fatigue limit model; Visual inspection; Partial safety factor
This paper presents a probabilistic framework for deriving the safety factors for fatigue of steel and composite steel concrete road bridges. Uncertainties in engineering models and dynamic amplification factors are established through comparison of measurements and models. The study shows that the currently recommended safety factors for fatigue by Eurocodes need to be raised.
This paper presents a probabilistic framework to derive the safety factors for fatigue of steel and composite steel concrete road bridges. Engineering models are used for the design and the safety factor is derived in such a way that the design meets the target reliability set by international Eurocode and ISO standards, estimated using measured data and advanced probabilistic models. Engineering model uncertainties and dynamic amplification factors are established through comparison of measurements and models. The value of visual inspections is quantified based on observations from practice and expert opinions. The safety factors are derived for Eurocode's Fatigue Load Model 4 and Eurocode's tri-linear S-N curve. The study shows that the safety factors for fatigue as currently recommended by the Eurocodes need to be raised.
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