Fatigue Flexural Behavior of Corroded Reinforced Concrete Beams Repaired with CFRP Sheets
Publication: Journal of Composites for Construction
Volume 15, Issue 1
Abstract
This study investigated the flexural behavior of corroded steel reinforced concrete beams repaired with carbon-fiber-reinforced polymer (CFRP) sheets under repeated loading. Thirty beams were constructed and tested. Fatigue flexural failure occurred in 29 of these beams. The study showed that pitting of the steel reinforcement due to corrosion occurred only after about a 7% actual mass loss which coincided with a decrease in the fatigue performance of the beam. The controlling factor for the fatigue strength of the beams is the fatigue strength of the steel bars. Repairing with CFRP sheets increased the fatigue capacity of the beams with corroded steel reinforcement beyond that of the control unrepaired beams with uncorroded steel reinforcement. Beams repaired with CFRP at a medium corrosion level and then further corroded to a high corrosion level before testing had a comparable fatigue performance to those that were repaired and tested after corroding directly to a high corrosion level.
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Acknowledgments
The writers would like to acknowledge support received from the ISIS Canada Network of Centers of Excellence. The donation of the CFRP sheets from SIKA Canada and the concrete from Hogg Ready Mix is appreciated. The help in laboratory work provided by the University of Waterloo laboratory technicians and the other members of our research group at the University of Waterloo is greatly appreciated.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 1 • February 2011
Pages: 42 - 51
Copyright
© 2011 ASCE.
History
Received: Feb 4, 2010
Accepted: May 22, 2010
Published online: Jun 8, 2010
Published in print: Feb 2011
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