Critical crack depth in corrosion-induced concrete cracking

Lau, I, Fu, G, Li, C, De Silva, S and Guo, Y 2018, 'Critical crack depth in corrosion-induced concrete cracking', ACI Structural Journal, vol. 115, no. 4, pp. 1175-1184.

Document type: Journal Article
Collection: Journal Articles

Title Critical crack depth in corrosion-induced concrete cracking
Author(s) Lau, I
Fu, G
Li, C
De Silva, S
Guo, Y
Year 2018
Journal name ACI Structural Journal
Volume number 115
Issue number 4
Start page 1175
End page 1184
Total pages 10
Publisher American Concrete Institute
Abstract Practical experience and observations suggest that corrosion affected reinforced concrete (RC) structures are more prone to cracking than other forms of structural deterioration. Once a crack initiates at the steel-concrete interface, it will propagate to a critical depth at which the crack becomes unstable and suddenly propagate to the concrete surface. This paper aims to develop an analytical method to predict the critical crack depth in corrosion-induced cracking of reinforced concrete structures. This method is derived based on fracture mechanics whereby the stress intensity factor for a single radial crack in a thick-walled cylinder is first determined using the weight function method. It is found that the critical crack depth occurs at the same point regardless of the tensile strength but increases with the increase in concrete cover. It is also found that the concrete cover significantly affects the maximum internal pressure compared to concrete tensile strength.
Subject Structural Engineering
Keyword(s) corrosion
crack depth
stress intensity factor
weight function.
DOI - identifier 10.14359/51702261
Copyright notice Copyright © 2018, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors.
ISSN 0889-3241
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