Analytical Model for CFRP-Strengthened Prestressed Concrete Girders Subject to Cyclic Loading
Publication: Journal of Composites for Construction
Volume 15, Issue 5
Abstract
An analytical model is presented to simulate the behavior of prestressed concrete girders strengthened with various carbon fiber-reinforced polymer systems and subjected to static and cyclic loading. The initial concrete strains owing to prestressing and girder self weight load at the moment of the application of the strengthening system and the concrete cyclic creep as a result of the cyclic loading are considered in the model. Experimental results are used to validate the analytical model. Additionally, deflection and concrete strain increases on account of the cyclic loading are compared to the values provided by Comité Euro-International du Béton and Fédération Internationale de la Précontrainte (CEB-FIP) and Assoçião Brasileira de Normas Técnicas (NBR) 6118 codes. Deflection and concrete strain obtained from the analytical model were above those observed in the tested girders, especially after 100,000 cycles, owing to the logarithmic function used to express the fatigue behavior of concrete. In general, deflection provided by CEB-FIP was above experimental and analytical deflection, but otherwise concrete strain values provided by NBR 6118 were close to experimental results.
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Acknowledgments
The authors are grateful to Prof. Sami Rizkalla and to North Carolina State University (NCSU), where the first author stayed for one year as part of his doctoral program, to the Universities of Brasilia (UnB) and Pará (UFPa) in Brazil, to the National Council for Science and Technological Development (CNPq) and Coordination for Graduate Improvement (CAPES), Brazilian research development agencies.
References
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 5 • October 2011
Pages: 871 - 874
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jun 21, 2010
Accepted: Jan 6, 2011
Published online: Jan 8, 2011
Published in print: Oct 1, 2011
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