CORROSION-INDUCED BOND DETERIORATION IN REINFORCED CONCRETE STRUCTURES

Author(s): Shangtong Yang and Chun-Qing Li
Book Title: RILEM International Symposium on Concrete Modelling - CONMOD 2014
Editor: Kefei Li, Peiyu Yan and Rongwei Yang
ISBN: 978-2-35158-139-1
e-ISBN: 978-2-35158-140-7
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 470-477
Total Pages: 8
Language: English

Abstract: Corrosion of reinforcing steel in concrete is a global problem for reinforced concrete (RC) structures located in a chloride and/or carbon dioxide-laden environment. The corrosion can alter the interface between the steel and concrete and thus affects the bonding mechanism. This subsequently influences the behaviour of reinforced concrete structures in terms of their safety and serviceability. The present paper attempts to develop a numerical model for deterioration of the bond between reinforcing steel and concrete subjected to reinforcement corrosion. 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 bond are explicitly expressed as a function of corrosion rate. An example of RC sea wall is carried out to demonstrate the application of the derived model. 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 behaviour compared with the uncorroded ones.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00