Time-dependent fatigue reliability assessment for welded joints of orthotropic steel bridge decks based on the probability density evolution method

被引：0
作者：
Hao, Jing [1 ]
Lu, Hailin [1 ,2 ]
Chen, Long [3 ]
机构：
[1] School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan
[2] Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan Institute of Technology, Wuhan
[3] China Railway 11th Bureau Group No. 1 Engineering Co., Ltd., Xiangyang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 18期
关键词：
degradation of the fatigue behavior; growth of loading effect; orthotropic steel deck; probability density evolution method; time-dependent fatigue reliability;
D O I：
10.13465/j.cnki.jvs.2024.18.010
中图分类号：
学科分类号：
摘要：
A time-dependent fatigue reliability assessment method based on the probability density evolution method was proposed for orthotropic steel deck welded joints, and applied in the example of a welded rib-to-deck joint in the Runyang Bridge. Firstly, based on the S-N curve and Miner's criterion, the fatigue limit state function of the welded joint in steel deck with consideration of the degradation of the fatigue behavior and growth of loading effect was established, and the probability density evolution equation was derived. Then, the equation was solved by the finite difference method to obtain the corresponding probability density evolution surface, and then a time-dependent fatigue reliability assessment method for that was presented. Finally, the feasibility and accuracy of the proposed method was verified through the engineering example, and the influences of degradation of the fatigue behavior and growth of loading effect on the time-dependent fatigue reliability of the welded joint were discussed. The results reveal that the proposed method is of preferable computational precision, efficiency, and can capture the probability density evolution information by comparison with the Monte Carlo method. Degradation of the fatigue behavior and growth of loading effect significantly affect the fatigue life of the welded joints in orthotropic steel decks. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：87 / 95
页数：8
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