Stochastic Modeling of Reinforced Concrete Structures Exposed to Chloride Attack

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Abstract

For many reinforced concrete structures corrosion of reinforcement is an important problem since it can result in expensive maintenance and repair actions. Further, a significant reduction of the load-bearing capacity can occur. One mode of corrosion initiation is that the chloride content around the reinforcement exceeds a critical threshold value. In the present paper a stochastic model is described by which the chloride content in a reinforced concrete structure can be estimated. The chloride ingress is modeled by a 2-dimensional diffusion process and the diffusion coefficient, surface chloride concentration and reinforcement cover depth are modeled by stochastic fields. The paper contains a description of the parameters to be included in a stochastic model and a proposal for the information needed to obtain values for the parameters in order to be ab le to perform reliability investigations. The distribution of the time to initiation of corrosion is estimated by simulation. As an example a bridge pier in a marine environment is considered.
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For many reinforced concrete structures corrosion of reinforcement is an important problem since it can result in expensive maintenance and repair actions. Further, a significant reduction of the load-bearing capacity can occur. One mode of corrosion initiation is that the chloride content around the reinforcement exceeds a critical threshold value. In the present paper a stochastic model is described by which the chloride content in a reinforced concrete structure can be estimated. The chloride ingress is modeled by a 2-dimensional diffusion process and the diffusion coefficient, surface chloride concentration and reinforcement cover depth are modeled by stochastic fields. The paper contains a description of the parameters to be included in a stochastic model and a proposal for the information needed to obtain values for the parameters in order to be ab le to perform reliability investigations. The distribution of the time to initiation of corrosion is estimated by simulation. As an example a bridge pier in a marine environment is considered.
Original languageEnglish
Title of host publicationLife-Cycle Performance of Deterioration Structures - Assessment, Design and Management : Proceedings of the 3rd IABMAS workshop on life-cycle cost analysis and design of civil infrastructure systems and JCSS workshop on probabilistic modeling of deterioration processes in concrete structures
EditorsDan M. Frangopol, Eugen Brühwiler, Michael H. Faber, Bryan Adey
Number of pages8
PublisherAmerican Society of Civil Engineers
Publication date2003
Pages175-182
ISBN (Print)0-7844-0707-X
Publication statusPublished - 2003
Publication categoryResearch
Peer-reviewedYes
Event3rd IABMAS Workshop on Life-Cycle Cost Analysis and Design of Civil Infrastructure Systems and JCSS Workshop on Probabilistic Modeling of Deterioration Processes in Concrete Structures - Lausanne, Switzerland
Duration: 24 Mar 200326 Mar 2003
Conference number: 3

Conference

Conference3rd IABMAS Workshop on Life-Cycle Cost Analysis and Design of Civil Infrastructure Systems and JCSS Workshop on Probabilistic Modeling of Deterioration Processes in Concrete Structures
Nummer3
LandSwitzerland
ByLausanne
Periode24/03/200326/03/2003

    Research areas

  • Stochastic Modelling, Concrete Structures, Chloride Attack
ID: 130642