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http://dx.doi.org/10.12989/scs.2021.38.3.271

Fatigue property analysis of U rib-to-crossbeam connections under heavy traffic vehicle load considering in-plane shear stress  

Yang, Haibo (School of civil engineering, Harbin Institute of Technology)
Qian, Hongliang (School of civil engineering, Harbin Institute of Technology)
Wang, Ping (School of Ocean Engineering, Harbin Institute of Technology at Weihai)
Publication Information
Steel and Composite Structures / v.38, no.3, 2021 , pp. 271-280 More about this Journal
Abstract
In this study, the fatigue property of U rib-to-crossbeam connections in orthotropic steel bridge (OSB) crossbeams under heavy traffic vehicle load was investigated considering the effects of in-plane shear stress. The applicability of an improved structural stress (ISS) method was validated for the fatigue behavior analysis of nonwelded arc-shaped cutout regions in multiaxial stress states. Various types of fatigue testing specimens were compared for investigating the equivalent structural stress, fatigue crack initiation positions, and failure modes with the unified standards. Furthermore, the implications of OSB crossbeams and specified loading cases are discussed with respect to the improved method. The ISS method is proven to be applicable for analyzing the fatigue property of nonwelded arc-shaped cutout regions in OSB crossbeams. The used method is essential for gaining a reliable prediction of the most likely failure modes under a specific heavy traffic vehicle load. The evaluated results using the used method are proven to be accurate with a slighter standard deviation. We obtained the trend of equivalent structural stress in arc-shaped cutout regions and validated the crack initiation positions and propagation directions by comparing them with the fatigue testing results. The implications of crossbeam spans on fatigue property are less significant than the effects of crossbeams.
Keywords
orthotropic steel bridges; heavy traffic vehicle load; in-plane shear structural stress; improved structural stress;
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Times Cited By KSCI : 3  (Citation Analysis)
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