Fatigue reliability assessment of steel bridge details integrating weigh-in-motion data and probabilistic finite element analysis

Authors:
Tong Guo;Dan M. Frangopol;Yuwen Chen
Affiliations:
Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast University, Nanjing 210096, China;Department of Civil and Environmental Engineering, ATLSS Engineering Research Center, Lehigh University, 117 ATLSS Dr., Bethlehem, PA 18015-4729, USA;Key Laboratory of Concrete and Prestressed Concrete Structures, Ministry of Education, Southeast University, Nanjing 210096, China
Venue:
Computers and Structures
Year:
2012

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Abstract

An advanced traffic load model is developed based on weigh-in-motion data. This model takes into account the uncertainties associated with the number of axles, axle weights, axle spacing and transversal position of vehicles. Combined with the traffic load model, a probabilistic finite element analysis approach is proposed to evaluate the time-dependent fatigue reliability levels of steel bridge details. The calculated results are in agreement with those obtained from monitored data. The proposed methodology can be used as a tool accompanying a monitoring program to obtain the fatigue reliability levels associated with the fatigue sensitive bridge details that are not monitored.