Network-level bridge management using a multiobjective optimization decision model

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Conference1st CSCE Specialty Conference on Infrastructure Technologies, Management and Policy: 01 June 2005, Toronto, ON.
Pages1211 - 121-9
AbstractThis paper presents an approach for network-level bridge maintenance optimization that prioritizes bridge structures for maintenance by considering several relevant objectives. Three relevant and conflicting objectives are selected in this study, namely: the minimization of maintenance costs, maximization of condition rating, and minimization of traffic disruption. The prediction of the condition rating of bridge structures is based on first-order Markov chain models that take into account the time-dependence and inherent uncertainty associated with the deterioration of bridge structures. The proposed approach can be used to rank a large number of different structures that are part of a large bridge network in terms of their priority or urgency for maintenance. The optimal solution is defined as the solution that achieves the best compromise between the selected optimization objectives. Compromise programming is used to determine the optimal ranking of bridge projects for maintenance in terms of their effectiveness in the minimization of maintenance costs and traffic disruption, and improvement of bridge network performance. A multi-criteria optimality index is proposed as a measure of the effectiveness of the optimal maintenance strategies in achieving a satisfactory trade-off between the above relevant and competing maintenance criteria for the network analyzed. The proposed approach is illustrated on a small network of ten bridge projects that are optimized for maintenance by considering the three criteria selected. The weighted and non-weighted multi-criteria indices are generated for these projects.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47691
NPARC number20377608
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Record identifierf784866f-030c-4eca-98f3-eca0025e5d85
Record created2012-07-24
Record modified2016-05-09
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