Journal article
Stochastic Modeling of Service Life of Concrete Structures in Chloride-Laden Environments
Journal of materials in civil engineering, Vol.24(4), pp.381-390
04/01/2012
Handle:
https://hdl.handle.net/2376/123142
Abstract
AbstractChloride-induced rebar corrosion is a common degradation process for concrete infrastructure, which is a practical concern for cold-climate states and coastal areas. In this work, numeric models based on the FEM are utilized to study service life of concrete structures subject to chloride ingress, where two models are utilized. The first one deals with multiple ionic species in the concrete pore solution, while the second one only accounts for the presence of chloride ions. The stochastic nature of model inputs is taken into consideration because each factor of interest is subject to random variabilities and inherent uncertainties. Specifically, the surface chloride concentrations and concrete cover depth follow the normal distribution; the diffusion coefficients obey the gamma distribution; the actual chloride threshold features the triangular distribution. The nonlinear partial differential equations (PDEs) to characterize the spatial and temporal evolution of ionic species are numerically solved, the results of which were utilized to elucidate the influence of various factors on concrete service life, such as mix design, surface chloride concentrations, cracking level, and coarse aggregate and concrete cover depth.
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Details
- Title
- Stochastic Modeling of Service Life of Concrete Structures in Chloride-Laden Environments
- Creators
- Yajun Liu - Montana State Univ. Research Scientist, Corrosion & Sustainable Infrastructure Laboratory, Western Transportation Institute, , P.O. Box 174250, Bozeman, MT 59717-4250Xianming Shi - Montana State Univ. Associate Research Professor, Civil Engineering Dept., , 205 Cobleigh Hall, MT State Univ., Bozeman, MT 59717-3900; Program Manager, Corrosion & Sustainable Infrastructure Laboratory, Western Transportation Institute, Montana State Univ., P.O. Box 174250, Bozeman, MT 59717-4250 (corresponding author). E-mail
- Publication Details
- Journal of materials in civil engineering, Vol.24(4), pp.381-390
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- American Society of Civil Engineers
- Identifiers
- 99900612702401842
- Language
- English
- Resource Type
- Journal article