Optimizing Lifetime Condition and Reliability of Deteriorating Structures with Emphasis on Bridges
Publication: Journal of Structural Engineering
Volume 134, Issue 4
Abstract
Deterioration mechanisms of existing structures have been identified and studied over the last decades. Uncertainties associated with mechanical loadings and environmental stressors (e.g., chloride intrusion, freeze-thaw cycles) make it difficult to accurately predict the life-cycle performance of these structures. In general, deteriorating structures are maintained by periodical interventions based on their condition states. Available resources are limited and maintenance decisions resulting from management systems concentrating on condition states of deteriorating structures are not always cost effective. Therefore, the need for reliability-based structure management is evident. Models for time-based and performance-based (condition-based or reliability-based) maintenance strategies are applied in this study to a deteriorating bridge in Colorado. Several maintenance interventions are considered and combined. Realistic data consisting of condition, reliability, and cost of maintenance actions are used. Finally, the optimum maintenance strategy considering condition, reliability, and cost is selected based on different criteria.
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Acknowledgments
The partial financial support of the Highways Agency, London, U.K., the U.S. National Science Foundation through Grant Nos. NSFCMS-0217290, NSFCMS-0509772, NSFCMS-0639428, NSFCMS-0638728, and the Netherlands Ministry of Transport, Public Works, and Water Management is gratefully acknowledged. The opinions and conclusions presented in this paper are those of the writers and do not necessarily reflect the views of the sponsoring organizations.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 4 • April 2008
Pages: 544 - 552
Copyright
© 2008 ASCE.
History
Received: Aug 7, 2006
Accepted: Nov 2, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
Notes
Note. Associate Editor: Finley A. Charney
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