Prediction Models for Debonding Failure Loads of Carbon Fiber Reinforced Polymer Retrofitted Reinforced Concrete Beams
Publication: Journal of Composites for Construction
Volume 10, Issue 1
Abstract
This study focuses on debonding failure in reinforced concrete beams with carbon fiber reinforced polymer composite bonded on the soffit using the wet lay-up method. An experimental study, which involved 26 tests, was carried out. The experiments showed two failure modes: Intermediate span debond and end debond. The first failure is the result of the high bond stress near the tip of a flexure-shear crack, whereas the second type of failure is due to the high shear stress developed in the weakest concrete layer at the tension reinforcement level. The experiments have shown that U-straps can be effective in preventing intermediate span and end debond. Based on experimental observations, two simple and practical theoretical models were developed and verified with the experimental data, together with a large database of other existing tests.
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Acknowledgments
The research reported in this paper is part of a study financed by a Monash Univ. Engineering Grant. All CFRP fabrics and adhesives were partly sponsored by MBT (Australia) Pty Ltd.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 10 • Issue 1 • February 2006
Pages: 48 - 59
Copyright
© 2006 ASCE.
History
Received: Dec 3, 2004
Accepted: May 26, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
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