Semianalytical Modeling of Concrete Beams Rehabilitated with Externally Prestressed Composites
Publication: Journal of Composites for Construction
Volume 13, Issue 2
Abstract
This study attempts to develop a semianalytical model for the mechanical behavior of reinforced concrete (RC) beams rehabilitated with externally prestressed carbon fiber-reinforced polymers (CFRP) laminates. The main significance of this study is the model of the process of degradation of RC beams until failure and its recovery through externally prestressed CFRP. Experiments have been carried out to observe the load–deflection behavior of fresh RC beams until the load resistance of the beam is exhausted. The beams have been rehabilitated with external CFRP laminates with varying levels of prestress. The rehabilitated beams have been reloaded until failure. The load–deflection behavior of the fresh and rehabilitated beams has been compared. A model for the load–deflection behavior of the fresh and rehabilitated beam has been proposed. The main import of the model is that it incorporates the effect of confinement of concrete. The model shows very good agreement with the experimental results.
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Acknowledgments
The present work is financially supported by the Board of Research in Nuclear Sciences, India and Department of Science and Technology, India. The writers also thank Fyfe India and Sika AG for donating the composite material system.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 2 • April 2009
Pages: 74 - 81
Copyright
© 2009 ASCE.
History
Received: Oct 12, 2006
Accepted: Sep 26, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
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