CFRP Repair of RC Beams with Shear-Span and Full-Span Corrosions
Publication: Journal of Composites for Construction
Volume 14, Issue 3
Abstract
This paper presents experimental and analytical results of a study conducted to investigate the use of carbon fiber-reinforced polymer (CFRP) laminates to rehabilitate shear-span and full-span corrosion-damaged RC beams. Fifteen RC beams were fabricated and were divided into three groups: control, shear-span, and full-span corrosions. The control beam was kept uncorroded and unstrengthened while the remaining 14 beams were corroded. One-half of the corroded beams were repaired with CFRP laminates, while the other one-half was tested without repair. Corrosion was induced in the tension steel reinforcement at a theoretical mass loss of 5, 10, and 15% using an accelerated technique. Test results showed that shear-span corrosion had a negligible influence on the flexural capacity, while full-span corrosion caused significant reductions up to 23% and 12% in the yield and ultimate capacity, respectively. The ductility of all corroded beams increased in comparison to the uncorroded unstrengthened beam (control). Repairing the corroded RC beams with CFRP laminates increased the flexural yield load and ultimate capacity by 19 and 50%, respectively, compared to the control beam. An analytical model based on section analysis, including the effect of steel reinforcement corrosion, was developed and compares well with the experimental results.
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Acknowledgments
The writers gratefully acknowledge the structural technicians at University of Waterloo for their support. Dr. Adil Al-Mayah is greatly thanked for his constructive comments. Donation of CFRP material by Sika Canada and concrete by Hogg Fuel Ready mix are appreciated.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 3 • June 2010
Pages: 323 - 335
Copyright
© 2010 ASCE.
History
Received: Oct 17, 2008
Accepted: Aug 26, 2009
Published online: Aug 28, 2009
Published in print: Jun 2010
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