Reliability-based system-level optimization of bridge maintenance and replacement decisions

Charles Antoine Robelin, Samer M. Madanat

Research output: Contribution to journalArticlepeer-review


This paper addresses the problem of optimizing bridge maintenance and replacement (M&R) decisions for a heterogeneous system of facilities. The objective is to determine optimal M&R policies for each facility over a finite planning horizon based on the knowledge of the current facilities conditions and on the prediction of future conditions. The system-level problem is based on the results of an M&Roptimization problem for each facility. The results of the facility-level optimization are incorporated in a reliability-based, bottom-up, system-level formulation that provides recommendations for each individual facility. We derive sufficient conditions for optimality and prove the result for the continuous case. A parametric study shows that the results obtained in the discretecase implementation of the solution are valid approximations of the continuous case results. The computational efficiency of the system-level solution makes the formulation suitable for systems of realistic sizes.

Original languageEnglish (US)
Pages (from-to)508-513
Number of pages6
JournalTransportation Science
Issue number4
StatePublished - Nov 2008


  • Infrastructure management
  • Optimization
  • Reliability

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Transportation


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