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Structural Monitoring and Maintenance
  Volume 1, Number 4, December 2014, pages 357-369
open access

Reliability-based condition assessment of a deteriorated concrete bridge
Farzad Ghodoosi, Ashutosh Bagchi, Tarek Zayed and Adel R.Zaki

    In the existing bridge management systems, assessment of the structural behavior is based on the results of visual inspections in which corresponding condition states are assigned to individual elements. In this process, limited attention is given to the correlation between bridge elements from structural perspective. Also, the uncertainty of parameters which affect the structural capacity is ignored. A system reliability-based assessment model is potentially an appropriate replacement for the existing procedures. The aim of this research is to evaluate the system reliability of existing conventional Steel-Reinforced bridge decks over time. The developed method utilizes the reliability theory and evaluates the structural safety for such bridges based on their failure mechanisms. System reliability analysis has been applied to simply-supported concrete bridge superstructures designed according to the Canadian Highway Bridge Design Code (CHBDC-S6) and the deterioration pattern is achieved based on the reliability estimates. Finally, the bridge condition index of an old existing bridge in Montreal has been estimated using the developed deterioration pattern. The results obtained from the developed reliability-based deterioration model and from the evaluation done by bridge engineers have been found to be in accordance.
Key Words
    bridge; reliability; deterioration; conventional steel-reinforced deck
Farzad Ghodoosi, Ashutosh Bagchi and Tarek Zayed: Department of Building, Civil & Environmental Engineering, Concordia University, 1455 de Maisonneuve blvd. West, Montréal, Quebec, Canada H3G 1M8
Adel R.Zaki: SNC-Lavalin Inc., 455 René-Lévesque, Blvd. West, Montréal, Quebec, Canada, H2Z 1Z3

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