Fatigue and Overloading Behavior of Steel–Concrete Composite Flexural Members Strengthened with High Modulus CFRP Materials
Publication: Journal of Composites for Construction
Volume 11, Issue 6
Abstract
Due to corrosion and the continuous demand to increase traffic loads, there is a need for an effective system which can be used to repair and/or strengthen steel bridges and structures. This paper describes an experimental program, recently completed, to investigate the fundamental behavior of steel–concrete composite scaled bridge beams strengthened with new high modulus carbon fiber-reinforced polymer (HM CFRP) materials. The behavior of the beams under overloading conditions and fatigue loading conditions was studied as well as the possible presence of shear lag at the interface of the steel surface and the CFRP strengthening material. The test results are compared to an analytical model based on the fundamental principles of equilibrium and compatibility, to predict the behavior of the strengthened steel–concrete composite beams. Based on the findings of this research work, combined with other work in the literature, a design guideline is proposed for the use of HM CFRP for strengthening the steel flexural members typically used for bridges and structures.
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Acknowledgments
The writers would like to acknowledge the support provided by the National Science Foundation (NSF) Industry/University Cooperative Research Center (I/UCRC) for the Repair of Buildings and Bridges with Composites and the support provided by Mitsubishi Chemical FP America Inc.NSF
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Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 6 • December 2007
Pages: 659 - 669
Copyright
© 2007 ASCE.
History
Received: Feb 14, 2006
Accepted: Dec 16, 2006
Published online: Dec 1, 2007
Published in print: Dec 2007
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