Stochastic Simulation of Chloride Ingress into Reinforced Concrete Structures by Means of Multi-Dimensional Gaussian Random Fields

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Abstrakt

For many reinforced concrete structures corrosion of the 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 occurs when the chloride content around the reinforcement exceeds a critical threshold value. In the present paper FERM (the Finite Element Reliability Method) is employed for obtaining the probability of exceeding a critical chloride concentration level at the reinforcement bars using MCS (Monte Carlo Simulation). The chloride ingress is modeled by a 2-dimensional diffusion process by FEM (Finite Element Method) and the diffusion coefficient, surface chloride concentration and reinforcement cover depth are modeled by multidimensional stochastic fields, which are discretized using the EOLE (Expansion Optimum Linear Estimation) approach. As an example a bridge pier in a marine environment is considered and the results are given in terms of the distribution of the time for initialization of corrosion.
OriginalsprogEngelsk
TitelSafety and Reliability of Engineering Systems and Structures : Proceedings of the 9th International Conference on Structural Safety and Reliability
RedaktørerG. Augusti, G.I. Schuëller, M. Ciampoli
Antal sider8
ForlagMillpress
Publikationsdato2005
Sider617-624
ISBN (Elektronisk)90 5966 040 4
StatusUdgivet - 2005
Begivenhed9th International Conference on Structural Safety and Reliability, ICOSSAR 2005 - Rom, Italien
Varighed: 19 jun. 200523 jun. 2005

Konference

Konference9th International Conference on Structural Safety and Reliability, ICOSSAR 2005
LandItalien
ByRom
Periode19/06/200523/06/2005

Bibliografisk note

Published on cd

Emneord

  • Chloride Ingress
  • Monte Carlo Simulation
  • Radom Fields
  • EOLE
  • Finite Elements

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  • Citationsformater

    Frier, C., & Sørensen, J. D. (2005). Stochastic Simulation of Chloride Ingress into Reinforced Concrete Structures by Means of Multi-Dimensional Gaussian Random Fields. I G. Augusti, G. I. Schuëller, & M. Ciampoli (red.), Safety and Reliability of Engineering Systems and Structures: Proceedings of the 9th International Conference on Structural Safety and Reliability (s. 617-624). Millpress.