Full-Scale Experimental Study on the Negative Flexural Behavior of Orthotropic Steel–Concrete Composite Bridge Deck
Publication: Journal of Bridge Engineering
Volume 23, Issue 12
Abstract
The orthotropic steel–concrete composite deck, which consists of a concrete slab, an orthotropic steel plate, and shear connectors, has been applied for ameliorating the vehicle-induced fatigue damage on steel bridge decks. However, its static performance, especially its negative bending performance, has rarely been considered, despite its critical role in bridge durability and safety. Accordingly, negative bending tests on four full-scale composite deck specimens were carried out, in which the effects of steel-fiber-reinforced concrete (SFRC), the reinforcement ratio, and the shear connector type were investigated. The full-scale orthotropic steel plates of the test specimens were stiffened by large U-ribs, which were designed for construction convenience and cost reduction in applied engineering practice. The test results show that the bending stiffness of the composite deck was influenced by the reinforcement ratio and the shear connector type, and the load-carrying capacity was sensitive to the reinforcement ratio. The ultimate status was found to be dominated by buckling of the steel ribs. The use of SFRC had an obvious restraining effect on the crack-width development. Finally, the applicability of the current codes for the composite girder to the composite deck was verified by comparing the corresponding evaluations of reinforcement stress, bending stiffness, and crack feature with the test results.
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Acknowledgments
This research was sponsored by the Inner Mongolia Major Science and Technology Special Project (2016), Jiangxi Province Major Research and Development Program (20165ABC28001), and Tongji Civil Engineering Peak Discipline Plan. The authors are also indebted to X. Y. He and L. Tian for assistance with the conduction of the experiments. The supports are gratefully acknowledged.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 12 • December 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Dec 1, 2017
Accepted: Jun 19, 2018
Published online: Oct 8, 2018
Published in print: Dec 1, 2018
Discussion open until: Mar 8, 2019
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