Mechanical Behavior of Prefabricated Composite Box Girders with Corrugated Steel Webs under Static Loads
Publication: Journal of Bridge Engineering
Volume 23, Issue 10
Abstract
This paper introduces a new type of bridge structure: the prefabricated composite box girder with corrugated steel webs, which features use of a composite upper flange and a prestressed tubular bottom flange filled with concrete. To understand the flexural behavior of this new structure, a static experiment was conducted on a 32-m-span tested girder with simply supported boundaries to investigate the deflection, strains, and bending capacity of it. Meanwhile, the tested girder and two hypothetical reference girders were theoretically analyzed according to elementary beam theory to obtain further insight into the flexural failure mechanism and the effectiveness of the different components. The experimental and theoretical results fit well, revealing that the bottom flange dominated the flexural capacity and the tested girder had sufficient bending resistances to meet the requirements specified in bridge design codes. A simplified equation for bending capacity was also proposed. The findings from this research may provide a reference for the application of this type of bridge structure.
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Acknowledgments
This paper was based on the new bridge structure developed by the Xingtai Highway and Bridge Construction Company; this company also fabricated the test girder and provided the test site. The support provided by the China Scholarship Council (CSC) during a visit of Boshan Zhang to the Vienna University of Technology is also acknowledged.
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© 2018 American Society of Civil Engineers.
History
Received: Jan 10, 2018
Accepted: Apr 23, 2018
Published online: Jul 31, 2018
Published in print: Oct 1, 2018
Discussion open until: Dec 31, 2018
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