Journal
FRONTIERS IN MATERIALS
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2021.678855
Keywords
steel bridge; orthotropic steel deck; rib-to-deck weld joint; fatigue reliability assessment; whole-range S-N curve
Categories
Funding
- Natural Science Fund for Excellent Young Scholars of Jiangsu Province [BK20170097]
- Natural Science Fund of Jiangsu Province [BK20180776]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [18KJB560013]
- Science and Technology Project of Housing and Urban Rural Development Department [2018-K9-068]
- Research Fund of Key Laboratory of Large Structure Health Monitoring and Control [KLLSHMC1912]
Ask authors/readers for more resources
A new method considering load sequence effects for assessing the fatigue reliability of orthotropic steel decks has been proposed in this study. The results indicate that initial damage significantly reduces the fatigue reliability of orthotropic steel decks.
Fatigue damage accumulations would dramatically reduce the reliability and service life of the orthotropic steel decks. Incorrect fatigue assessment results may be obtained when load sequence effects are omitted. In the present study, fatigue reliability assessments of rib-to-deck weld joints in orthotropic steel bridge decks are conducted with the consideration of load sequence effects. The method, which judiciously considers the fatigue loading history and is derived from the sequential law and the whole-range S-N curve, is first proposed for fatigue reliability calculation. And then, the whole-range S-N curve describing the fatigue propagating process of the rib-to-deck weld joint is introduced. Finally, the developed method is applied to evaluate the fatigue reliability of two rib-to-deck weld joints in an orthotropic steel deck based on long-term measured strain histories. The influence of traffic growth and initial damage on the fatigue reliability is discussed. The results indicate that it is advisable to consider load sequence effects when assessing the fatigue reliability of orthotropic steel decks equipped with long-term strain monitoring systems and the initial damage significantly reduces the fatigue reliability of orthotropic steel decks.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available