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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Time-Dependent Reliability Analysis of Corrosion-Induced Concrete Cracking
Author(s): Chun Qing Li and Robert E. Melchers
Publication: Structural Journal
Appears on pages(s): 543-549
Keywords: corrosion; cracking; failure; serviceability
Abstract:Determining corrosion-induced concrete cracking is essential to predicting the serviceability of corrosion-affected reinforced concrete structures and to instigating maintenance and repairs for the structures. This paper attempts to present a reliability-based methodology for serviceability assessment of corrosion-affected concrete structures, using the performance criterion of concrete crack width. A stochastic model for crack width is developed and a time-dependent method is employed to quantify the probability of serviceability failure so that the time for the structure to be unserviceable and, hence, requiring repairs, can be determined with confidence. A parametric study is also undertaken to identify the factors that affect the failure due to corrosion-induced concrete cracking. A merit of the proposed methodology is that the structural assessment is directly related to one of the design criteria used by practitioners. It is found that corrosion-induced concrete cracking can be modeled as a stochastic process with little autocorrelation and that the corrosion rate is the most important single factor that affects cracking failure. The methodology presented herein can serve as a tool for structural engineers and asset managers in making decisions with regard to the serviceability of corrosion-affected concrete structures.
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