Novel Approach for Multicriteria Optimization of Life-Cycle Preventive and Essential Maintenance of Deteriorating Structures
Publication: Journal of Structural Engineering
Volume 136, Issue 8
Abstract
In this paper, the performance of structures is modeled using lifetime functions. Specifically, the unavailability and redundancy are used as performance indicators, based on which optimum maintenance strategies are sought. Models that reflect the separate or combined effects of essential and preventive maintenance on the unavailability are presented. A novel optimization approach is proposed in which the problem is formulated to provide optimum maintenance strategies with either or both essential and preventive maintenance actions. Genetic algorithms are used to solve this problem. In this paper, multiple essential maintenance types and multiple preventive maintenance types are considered, and regular or irregular preventive maintenance time-intervals are considered. Furthermore, essential maintenance is treated as performance-based, i.e., essential maintenance is only applied when a performance threshold is reached, and an algorithm is proposed for conducting the optimization under uncertainty. Although applicable to any type of structure, the proposed approach is illustrated on a highway bridge example.
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Acknowledgments
The support from (1) the National Science Foundation through Grant Nos. NSFCMS-0638728 and NSFCMS-0639428; (2) the Commonwealth of Pennsylvania, Department of Community and Economic Development, through the Pennsylvania Infrastructure Technology Alliance (PITA); (3) the U.S. Federal Highway Administration Cooperative Agreement Award No. UNSPECIFIEDDTFH61-07-H-00040; and (4) the U.S. Office of Naval Research Contract No. UNSPECIFIEDN00014-08–1-0188 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 136 • Issue 8 • August 2010
Pages: 1009 - 1022
Copyright
© 2010 ASCE.
History
Received: Nov 11, 2008
Accepted: Feb 1, 2010
Published online: Feb 6, 2010
Published in print: Aug 2010
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