首页|Experimental Study on Ultimate Behavior at Negative Moment Regions of Composite Bridges
Experimental Study on Ultimate Behavior at Negative Moment Regions of Composite Bridges
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This paper presents experimental results of the ultimate behavior of the negative moment region of a quarter-scale full model and a half-scale subassemblage model of a two-span continuous composite bridge of concrete deck slab on steel girder. The two specimens are based on a prototype bridge that has a large girder spacing [3,800 mm (13 ft)]. At the ultimate state, it is shown that a larger portion of the deck is activated to resist tensile stress compared with the effective width specified in the AASHTO load and resistance factor design bridge specifications. Also, a plastic hinge that forms at the internal support has enough rotational capacity (ductility) to enable development of a second plastic hinge within the span. Experimental results show a reasonably good match with accompanying finite element method analyses.
Il-Sang Ahn、Methee Chiewanichakorn、Aaron F. Nottis、Jeffrey A. Carpenter、Stuart S. Chen、Amjad J. Aref
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Department of Civil, Structural, and Environmental Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260
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