Study on in-plane double-crack propagation in the rib-to-deck welded toe of steel-bridge

Liu, Jia; Liu, Minglu; Ma, Shuai; Tu, Wanqing

doi:10.1016/j.jcsr.2023.107838

Cited by 11 publications

(1 citation statement)

References 18 publications

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“…Due to residual stress and prolonged exposure to vehicular loads, fatigue cracks inevitably develop in the orthotropic steel bridge decks over time [1][2][3]. The welded joint of the deck and U-rib is a susceptible area to fatigue [4][5][6]. This vulnerability is primarily due to the prevalence of partial penetration welds in the early construction of steel bridges, which leads to crack initiation at the weld root, as depicted in figure 1.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic penetration method for weld root crack in orthotropic steel decks: differentiation and quantitative recognition

Xia,

Yuanzhou,

et al. 2024

Meas. Sci. Technol.

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Weld root crack represents a significant concern in terms of fatigue on orthotropic steel decks (OSDs). This study presents a crack detection method based on ultrasonic penetration signals, to effectively distinguish and quantify cracks in decks. Firstly, based on the principles of sound diffusion and the structural characteristics of orthotropic steel decks, the parameters were established. Then, the propagation mechanism of ultrasonic waves in decks containing cracks was investigated by finite element analysis. The variations in received signal intensity caused by root-deck and root-weld crack parameters were analyzed and the methods for distinguishing between crack types and determining characteristics were proposed. Finally, experimental tests were conducted on weld root cracks to validate the feasibility of the detection method. The research findings demonstrate that the selected detection parameters adequately meet the requirements for crack detection. By utilizing fitting functions between the transmission signals from two sets of detection parameters and the projected crack length, the method achieves accurate identification of crack length and angle, with an error rate of less than 10%.

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