Fatigue resistance of rib to deck, crossbeam to deck and deck to deck welds in orthotropic decks using structural stress

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On the interaction of axial and bending loads in the weld root fatigue strength assessment of load-carrying cruciform joints

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Summary: The study aims to investigate the fatigue performance of LCX joints under cyclic axial and bending loads, finding that the nominal weld stresses can be applicable for bending-loaded joints, while effective notch stress analyses may lead to unconservative results in some cases.

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An experimental investigation into fatigue behaviors of single- and double-sided U rib welds in orthotropic bridge decks

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INTERNATIONAL JOURNAL OF FATIGUE (2022)

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A new orthotropic steel deck system incorporating two novel structural details

Le-tian Da et al.

Summary: This study proposed two novel structural details to improve the fatigue resistance of orthotropic steel decks (OSDs). By eliminating crack-like defects and transferring stress ranges, these novel structural details can enhance the fatigue performance of rib-to-deck and rib-to-floorbeam welded joints.

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Article Engineering, Civil

Machine Learning-Assisted probabilistic fatigue evaluation of Rib-to-Deck joints in orthotropic steel decks

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Summary: This study integrates fatigue testing and numerical prediction to derive a comprehensive probability-stress-life (P-S-N) curve for rib-to-deck (RD) welded joints in orthotropic steel decks. The study establishes a probabilistic fatigue crack growth (PFCG) model and uses machine-learning tools to assist in the prediction. The results show improved agreement between the model prediction and test data, with a significant reduction in solution cost.

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Article Engineering, Mechanical

Analysis of fatigue test conditions for reproducing weld toe cracking into U-rib wall in orthotropic bridge decks

Haibo Yang et al.

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INTERNATIONAL JOURNAL OF FATIGUE (2022)

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Article Construction & Building Technology

Fatigue crack growth behavior of rib-to-deck double-sided welded joints of orthotropic steel decks

Yang Liu et al.

Summary: This study investigates the three-dimensional mixed mode fatigue crack growth behavior of rib-to-deck double-sided welded joints of OSDs through numerical simulation. The equivalent SIF shows complex variations during the growth stage, and the final crack shape exhibits characteristics of a spatial curved surface. Initial crack geometry significantly impacts the fatigue life of the welded joints.

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Article Metallurgy & Metallurgical Engineering

Experimental fatigue assessment of connections between plate-type longitudinal ribs and non-slit transverse ribs in orthotropic steel decks

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WELDING IN THE WORLD (2021)

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Article Construction & Building Technology

Stress behaviors of rib-to-deck double-sided weld detail on orthotropic steel deck

Zhiwen Zhu et al.

Summary: This study investigated stress behaviors at a rib-to-deck double-sided weld detail through controlled truck loading tests on a long-span cable-stayed bridge. Results showed that stress at the detail was dominated by significant local effects, with higher stress range at the outside weld compared to the inner weld. Finite element analysis indicated that the riding-rib-wall loading was the most critical transverse loading location.

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Article Materials Science, Multidisciplinary

Experimental study on the root-deck fatigue crack on orthotropic steel decks

Dalei Wang et al.

Summary: The root-deck crack is a significant fatigue issue on OSDs, impacting bridge serviceability and being challenging to detect. Fatigue testing and microscopic examination identified lack of penetration at the weld root and high stress as key factors in crack initiation and propagation. Comparing with other fatigue test results, differences between root-deck crack and toe-deck crack failures were highlighted, providing insights for improved fatigue design of OSDs.

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Article Engineering, Mechanical

Rib loading effects on weld root fatigue failure modes at rib-to-deck welded joint

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A semi-analytical formula for calculating the notch stress field of cruciform welded joint under bending loading

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An equivalent structural stress-based fatigue evaluation framework for rib-to-deck welded joints in orthotropic steel deck

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Experimental investigation for structural parameter effects on fatigue behavior of rib-to-deck welded joints in orthotropic steel decks

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Experimental study on fatigue failure of rib-to-deck welded connections in orthotropic steel bridge decks

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Development of fatigue test method and improvement of fatigue life by new functional steel plates for welding of trough rib and deck plate of orthotropic decks

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Fatigue resistance of rib to deck, crossbeam to deck and deck to deck welds in orthotropic decks using structural stress

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