The corrosion damage mechanism in existing reinforced concrete (RC) bridges exhibit different corrosion properties depending on the environment. One way to evaluate the corrosion damage of RC bridges is to evaluate the existing RC pile corrosion of the bridge substructure. This is done by evaluating the structural joint failure probability due to carbonation, chloride ion ingress, sulfate attack, and load-carrying capacity. This article reports on a study that investigated the failure probability for existing reinforced concrete (RC) pile corrosion due to carbonation, chloride ion ingress and sulfate attack combined with the load-carrying capacity for bridge substructures at different amounts of service times. The authors note that the general corrosion resulted from carbonation, and the pitting corrosion occurred from chloride ion ingress. The authors also describe the chemical mechanism due to sulfate attack of the existing RC piles of a bridge substructure. The authors use as an example an existing RC bridge pile with a service time of 60 years to illustrate the structural joint failure probability theory. The structural joint failure probability in this example had lower and upper bound values of .440382 and .502755, respectively. The authors offer these results as a support for critical decision-making for the repair, strengthening, or demolition of existing RC bridge substructure pile foundations. The authors conclude that their proposed method can reasonably and reliably predict the structural joint failure probability for existing bridge RC piles due to corrosion and load-carrying capacity. They note that the proposed method can be extended to caissons subjected to corrosion attack and load-carrying capacity.

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    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Liang, M-T
    • Lan, J-J
  • Publication Date: 2005-3


  • English

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  • Accession Number: 00989010
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 29 2005 12:00AM