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INTEGRATION OF MAINTENANCE, REPAIR AND REPLACEMENT DECISIONS IN BRIDGE MANAGEMENT BASED ON RELIABILITY, OPTIMIZATION AND LIFE-CYCLE COST.
| 题名： | INTEGRATION OF MAINTENANCE, REPAIR AND REPLACEMENT DECISIONS IN BRIDGE MANAGEMENT BASED ON RELIABILITY, OPTIMIZATION AND LIFE-CYCLE COST. |
| 作者： | Frangopol-DM; Enright-MP; Estes-AC |
| 关键词： | Bridge-management-systems; Decision-making; Highway-bridges; Life-cycle-costing; Maintenance-; Optimization-; Reliability-Statistics; United-States |
| 摘要： | Over the past several decades, the concepts of structural reliability, optimization, and life-cycle cost analysis and design have developed rapidly and become widely accepted among researchers and increasingly acknowledged among practicing engineers. The United States has a national inventory of almost 600,000 highway bridges, many of which have deteriorated substantially and will require large expenditures to repair. A reliability-based approach to optimizing the maintenance, repair and replacement of these bridges will provide a more efficient use of limited financial resources by ensuring an acceptable level of safety at a minimum expected life-cycle cost. The application of the minimum expected life-cycle cost criterion to optimize the management of highway bridges in the United States was recommended in 1991 by the Intermodal Surface Transportation Efficiency Act of Congress. Also, the 1996 National Science Foundation Workshop on Incorporation of Structural Reliability in Bridge Engineering recommended that a methodology for realistic life-cycle cost estimation of highway bridges has to be developed and used to produce optimal expenditures for new and existing bridges under reliability constraints. These optimal expenditures have to take into account all expected costs from the design stage to the end of the bridge's life span. Such a methodology could be incorporated into modern bridge management systems. This paper presents such a methodology by integrating maintenance, repair and replacement decisions in bridge management based on reliability, optimization, and life-cycle cost. After providing the framework of this methodology, the approach is illustrated for both new and existing highway bridges. Applying this methodology on a network-level by using life-cycle activity profiles requires considerable research support. Increased data expected in the future will permit the rational evolution of bridge management systems based on reliability, optimization, and life-cycle cost considerations. |
| 总页数： | Conference Title: Eighth International Bridge Management Conference. Location: Denver, Colorado. Sponsored by: Transportation Research Board Committee on Bridge Maintenance and Management (A3C06). Held: 19990426-19990428. Transportation Research Circular |
| 报告类型： | 科技报告 |
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