Analytical Model for Residual Bond Strength of Corroded Reinforcement in Concrete Structures

Article


Chen, Hua-Peng and Nepal, J. 2016. Analytical Model for Residual Bond Strength of Corroded Reinforcement in Concrete Structures. Journal of Engineering Mechanics. 142 (2).
AuthorsChen, Hua-Peng and Nepal, J.
Abstract

Bond strength deterioration in corrosion-damaged reinforced concrete structures significantly affects serviceability and load-carrying capacity in their remaining service life. This paper presents a new analytical model for predicting the cracking development in the surrounding concrete and the residual bond strength of rebar in concrete structures due to reinforcement corrosion. The proposed analytical method adopts the thick-walled cylinder model for the cover concrete and considers the realistic properties of the corrosion-induced cracked concrete such as anisotropic behavior, residual tensile strength, and reduced tensile stiffness. As corrosion progresses, three phases for bond strength evolution associated with concrete cracking development are defined and the corresponding corrosion levels in each phase are determined. By using the constructed new governing equation, the crack width growth in the concrete cover and the radial bursting pressure at the bond interface are evaluated. The ultimate bond strength is then estimated from the contributions of adhesion, confinement, and corrosion pressure as a function of corrosion level. Finally, the effectiveness of the proposed analytical model is demonstrated by comparing the predicted results with experimental data available, and the results show that the proposed model is useful for predicting the bond strength evolution of the corroded rebar in concrete structures.

JournalJournal of Engineering Mechanics
Journal citation142 (2)
ISSN0733-9399
Year2016
PublisherAmerican Society of Civil Engineers
Accepted author manuscript
License
File Access Level
Anyone
Digital Object Identifier (DOI)doi:10.1061/(ASCE)EM.1943-7889.0000997
Web address (URL)https://doi.org/10.1061/(ASCE)EM.1943-7889.0000997
Publication dates
Online18 Aug 2015
PrintFeb 2016
Publication process dates
Deposited10 Oct 2018
Accepted20 Jul 2015
Accepted20 Jul 2015
Copyright holder©2015 American Society of Civil Engineers.
Copyright informationThis material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)EM.1943-7889.0000997.
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