Numerical Simulation of Behavior of Reinforced Concrete Structures considering Corrosion Effects on Bonding
Publication: Journal of Structural Engineering
Volume 140, Issue 12
Abstract
Corrosion of reinforcing steel in concrete can alter the interface between the steel and concrete and thus affects the bond mechanism. This subsequently influences the behavior of reinforced concrete structures in terms of their safety and serviceability. The present paper attempts to develop a numerical method that can simulate the behavior of reinforced concrete walls subjected to steel corrosion in concrete as measured by their load-deflection relationship. The method accounts for the effects of corrosion on the stiffness, maximum strength, residual strength, and failure mode of the bond between the steel and concrete. In the numerical method, the corrosion-affected stiffness and maximum strength of the bond are explicitly expressed as a function of the corrosion rate. It is found in this paper that the increase in the bond strength due to minor corrosion can increase the load-bearing capacity of the wall and the corrosion-affected reinforced concrete walls exhibit less ductile behavior compared with the uncorroded walls. The paper concludes that the developed numerical method can predict the behavior of corrosion-affected reinforced concrete seawalls with reasonable accuracy.
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Acknowledgments
The experiment from which the data are obtained for this study was carried out in the University of Dundee, United Kingdom, with which the first author used to work. Contributions from all project participants to the experiment, in particular Professor R. Jones, Dr. M. McCarthy, and Dr. S. Aguiar, are gratefully acknowledged. Financial support from the Australian Research Council with DP140101547 is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 12 • December 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 9, 2013
Accepted: Dec 4, 2013
Published online: Jun 4, 2014
Discussion open until: Nov 4, 2014
Published in print: Dec 1, 2014
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