Fatigue Performance Analysis of U-rib-to-deck Connection with Double-sided Weld in Orthotropic Steel Bridge Deck
Journal: Architecture Engineering and Science DOI: 10.32629/aes.v6i1.3754
Abstract
In order to explore the influence of weld structure on the fatigue performance of rib-to-deck (RD) connection with double-sided weld in orthotropic steel bridge deck, finite element model of the RD connection with double-sided weld was firstly established. Then, the influences of the weld penetration of outer groove weld, the ratio of weld toes (R), the notch size, the inner fillet weld, etc., on the stress amplitude of weld toes and roots were analysed. Finally, based on the master S-N curve method, the influence of the groove penetration and the ratio R on the fatigue life of the connection was studied. The results show that the groove penetration has insignificant influence on the weld fatigue life. However, the ratio R has great influence on the stress amplitude of weld roots and toes, the fatigue life and the cracking form of the connection. As the ratio R increases, the fatigue life firstly increases and then decreases. Otherwise, the fatigue life is relatively larger when the ratio R is close to 1.0, and fillet weld size of 4 or 6 mm could be applied for the inner fillet weld of the double-sided connection.
Keywords
orthotropic steel bridge deck; rib-to-deck weld connection; finite element analysis; fatigue life evaluation
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[6]Gao j, Ju X, Zuo Z, et al. Low temperature master S-N curve of high strength steel welded structure based on equivalent structural stress method[J]. Journal of Ship Mechanics, 2024,28(04):571-581.
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