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Open AccessArticle

Fatigue Performance of Different Rib-To-Deck Connections Using Traction Structural Stress Method

1
School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China
2
School of Naval Architecture and Ocean Engineering, Harbin Institute of Technology at WeiHai, Weihai 264200, China
3
Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI 48109, USA
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(4), 1239; https://doi.org/10.3390/app10041239
Received: 8 January 2020 / Revised: 31 January 2020 / Accepted: 8 February 2020 / Published: 12 February 2020
(This article belongs to the Section Mechanical Engineering)
The fatigue performance of an orthotropic steel bridge deck is significantly influenced by the type of the rib-to-deck connection considering the crossbeam. Fatigue fracture of the weld seam at the rib-to-deck connection has been a serious problem in such decks. In this paper, numerical models are developed for the orthotropic steel bridge decks and are analyzed for the fatigue behavior. The traction structural stress method is proven to be more accurate and effective in predicting the fatigue life. Fatigue behavior of three typical rib-to-deck connections are obtained by using traction structural stress method and by considering the effect of crossbeams. Compared to the bridge deck with weld seam of a large root, the fatigue performance of the deck with single-sided weld seam is much better with lower equivalent structural stress. The results indicate that the weld seam size should be strictly controlled for better fatigue resistance. The fatigue performance of the bridge deck with double-sided seam is significantly better than that of the bridge deck with single-sided weld seam. An increase in the thickness of the inner weld seam in the rib-to-deck connection optimizes the distribution of the equivalent structural stress and shifts the fatigue failure location from the weld root of the outer weld seam to the weld toe of the inner weld seam thus demonstrating the effect of the crossbeam. The trends of equivalent structural stress with geometric parameters of the weld seam in the rib-to-deck connection are obtained in this study. The fatigue behavior of the components and the equivalent structural stress are significantly influenced by the bridge deck thickness. View Full-Text
Keywords: orthotropic steel bridge; traction structural stress; equivalent structural stress; fatigue failure mode; geometry parameters analysis orthotropic steel bridge; traction structural stress; equivalent structural stress; fatigue failure mode; geometry parameters analysis
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Yang, H.; Wang, P.; Qian, H.; Dong, P. Fatigue Performance of Different Rib-To-Deck Connections Using Traction Structural Stress Method. Appl. Sci. 2020, 10, 1239.

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