Structural Behavior of Shear-Critical RC Slender Beams with Corroded Properly Anchored Longitudinal Steel Reinforcement
Publication: Journal of Structural Engineering
Volume 139, Issue 12
Abstract
The effect of corrosion of properly anchored longitudinal reinforcement on the structural behavior of shear-critical RC slender beams was experimentally investigated. A total of 10 medium-scale reinforced concrete beams were constructed. The beams measured 150 mm wide, 350 mm deep, and 2,400 mm in length. The test variables included corrosion levels (0, 2.5, 5, and 7.5%), existence of stirrups, and fiber-reinforced polymer (FRP) repair. Eight beams were subjected to artificial corrosion and two beams acted as control uncorroded beams. Following the corrosion phase, all beams were tested to failure in three-point bending. The test results revealed that corrosion of properly anchored longitudinal steel reinforcement does not have any adverse effect on the behavior of shear-critical RC slender beams. Corrosion changed the load transfer mechanism to a pure arch action and as a result the load-carrying capacity of the beam was improved. A simple analysis procedure was proposed to predict the failure load of such beams and the predicted results correlated very well with the experimental results.
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Acknowledgments
The authors would like to acknowledge the financial support in the form of graduate scholarship to R. Azam received from University of Engineering and Technology Lahore, Pakistan. The financial support received from the Natural Sciences and Engineering Research Council (NSERC) is also acknowledged. The donation of the concrete from Hogg Ready Mix is appreciated. Special thanks go to Dr. Ahmad El-Sayed for his contribution during the initial stages of this work. The help in laboratory work provided by the University of Waterloo technicians and the other members of the rehabilitation research group at the University of Waterloo is greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 139 • Issue 12 • December 2013
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 26, 2011
Accepted: Jan 3, 2013
Published online: Jan 5, 2013
Published in print: Dec 1, 2013
Discussion open until: Feb 6, 2014
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