TITLE

Reliability-Based System-Level Optimization of Bridge Maintenance and Replacement Decisions

AUTHOR(S)
Robelin, Charles-Antoine; Madanat, Samer M.
PUB. DATE
November 2008
SOURCE
Transportation Science;Nov2008, Vol. 42 Issue 4, p508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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&R optimization 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.
ACCESSION #
35882405

 

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