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Probabilistic life-time oriented multi-objective optimization of bridge mainten...
Neves, Luís A. C.; Frangopol, Dan M.; Cruz, Paulo J. S.The main objective of a bridge manager is to find the best maintenance plan for a group of bridges over a prescribed time horizon. The bridge manager usually faces conflicting ob- jectives, as nlaintenance plans resulting in safer and less deteriorated structures also lead to higher costs. In general, the problem is posed as a deterministic single-objective optimiza- tion where cost is minimized keeping perform...
Optimum maintenance strategy for deteriorating bridge structures based on lifet...
Yang, Seung-Ie; Frangopol, Dan M.; Neves, Luís A. C.The highway networks of most European and North American countries are completed or close to completion. However, many of their bridges are aging, and in the United States alone a very significant part of the about 600,000 existing bridges is considered to be deficient and must be replaced, repaired or upgraded in the short term. The funds available for the maintenance of existing highway bridges are extremely ...
Multi-objective probabilistic optimization of bridge lifetime maintenance : nov...
Neves, Luís A. C.; Frangopol, Dan M.; Cruz, Paulo J. S.Due to the increase in deterioration of the existing civil infrastructure, in particular bridge networks, governments and highway agencies are trying to find methods that allow a consistent and rational management of existing bridges. In this paper, a novel approach is presented. This approach uses multi-objective probabilistic optimization over time and defines performance of existing bridges in terms of lifet...
Lifetime multi-objective optimization of maintenance of existing steel structures
Neves, Luís A. C.; Frangopol, Dan M.; Cruz, Paulo J. S.In this paper, the lifetime performance of deteriorating structures, defined by their time dependent condition index and reliability index, is analyzed. The effect of preventive and essential maintenance actions on performance and cost in predicted, and the optimal times of application of preventive and essential maintenance actions are found. Due to significant uncertainty in the initial performance, effects o...
Predicting and optimizing lifetime performance of existing steel bridges under ...
Neves, Luís A. C.; Frangopol, Dan M.; Cruz, Paulo J. S.In this paper, the lifetime performance of existing steel bridges under preventive and essential maintenance actions is analyzed. Performance is measured by the reliability index (resulting from structural analysis) and the condition index (resulting from visual inspections). The analysis of performance using these two indicators allows the incorporation of the results of visual inspections in the assessment of...
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