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

Le Li, Mojtaba Mahmoodian, Alireza Khaloo and Zhiyan Sun
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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

Sustainability, 2021, vol. 14, issue 1, 1-16

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.

Keywords: bridge; deterioration; reliability; risk-cost optimization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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