Optimal network-level bridge maintenance planning based on minimum expected cost

D. M. Frangopol, E. S. Gharaibeh, J. S. Kong, M. Miyake

Research output: Contribution to journalConference articlepeer-review

38 Citations (Scopus)


The goal of bridge management is to determine and implement the best possible strategy that ensures an adequate level of safety at the lowest possible life-cycle cost. Although this is generally recognized, the integration of life-cycle cost analysis with bridge reliability analysis has been very limited. Moreover, this has been formulated and illustrated only for individual bridges. A framework for optimal network-level bridge maintenance planning based on minimum expected cost is presented. The goal is the minimization of the expected maintenance cost of a bridge stock with maintenance of the lifetime reliability of each bridge above an acceptable (target) level. The approach is illustrated for a stock of realistic highway bridges. Individual bridges in this stock have different ages, and their reliabilities are time dependent. The framework offers a rational basis for optimizing the resource allocation for management of a stock of gradually deteriorating bridges based on balancing life-cycle maintenance cost and lifetime reliability. This has important practical implications in the development of the optimal management strategy for the bridge stock.

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalTransportation Research Record
Issue number1696
Publication statusPublished - 2000
Externally publishedYes
Event5th International Bridge Engineering Conference - Tampa, FL, United States
Duration: 2000 Apr 32000 Apr 5

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering


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