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Risk-Cost Optimized Maintenance Strategy for Steel Bridge Subjected to Deterioration

Author

Listed:
  • Le Li

    (College of Engineering and Science, Victoria University, Footscray 3011, Australia)

  • Mojtaba Mahmoodian

    (School of Engineering, RMIT University, Melbourne 3000, Australia)

  • Alireza Khaloo

    (Department of Civil Engineering, Sharif University of Technology, Azadi Av., Tehran 1458889694, Iran)

  • Zhiyan Sun

    (Department of Infrastructure Engineering, The University of Melbourne, Parkville 3010, Australia)

Abstract

This paper aims to develop a deteriorated bridge maintenance strategy that ensures the safe operation of steel structures and minimizes the total risk. Five common failure modes are considered for the deteriorated bridge: flexure, shear, deflection, fatigue failure for girder, and chloride attack for the concrete deck. Time-dependent and system reliability analyses are carried out to find the probability of failure under these failure modes. Risk-cost optimization is then used to determine the maintenance strategy. This method was applied to a working example. It was found that the developed maintenance strategy can predict when, where, and what to maintain for a bridge to ensure its safe and serviceable operation during its lifespan. The proposed methodology can help structural engineers and asset managers repair and maintain bridges under deterioration.

Suggested Citation

  • Le Li & Mojtaba Mahmoodian & Alireza Khaloo & Zhiyan Sun, 2021. "Risk-Cost Optimized Maintenance Strategy for Steel Bridge Subjected to Deterioration," Sustainability, MDPI, vol. 14(1), pages 1-16, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2021:i:1:p:436-:d:715653
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