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Study of Fatigue Performance of Key Parts of New-Type Orthotropic Steel Deck
Pages: 20-24
Year: Issue:  5
Journal: World Bridges

Keyword:  orthotropic steel decklongitudinal ribfatigue propertydiaphragmstress rangefatigue performance;
Abstract: To provide reference for the design of orthotropic steel deck structures ,the ortho‐tropic steel deck with new type of large longitudinal ribs proposed by Man‐Chung Tang and Ka‐zuyuki Mizuguchi are taken to represent the baseline in this study ,The models of orthotropic steel plate structures with three types of longitudinal ribs were established ,to which the transverse and longitudinal loads were applied ,with the intension of examining the stress ranges of three fatigue‐sensitive details and using the results as main indexes to analyze the fatigue performance of each key fatigue‐sensitive parts .The results of the study indicate that in the vicinity of longitudinal rib‐top plate welding joints ,the stress range generated by the new large longitudinal ribs is high ,and by adding small inner separating plates , the fatigue performance of this part can be improved . Whereas at the intersections of longitudinal ribs and diaphragms ,the stress ranges of all the exam‐ined locations in the new large longitudinal rib models are smaller than those of the conventional longitudinal rib models .The new type of large longitudinal rib structure can distinctively reduce the amount of welding joints ,which is beneficial to manufacturing cost reduction and fatigue dete‐rioration control .
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