Multiobjective Maintenance Planning Optimization for Deteriorating Bridges Considering Condition, Safety, and Life-Cycle Cost
Publication: Journal of Structural Engineering
Volume 131, Issue 5
Abstract
Many of the currently available bridge management system tools focus on minimizing life-cycle maintenance cost of deteriorating bridges while imposing constraints on structural performance. The computed single optimal maintenance planning solution, however, may not necessarily meet a bridge manager’s specific requirements on lifetime bridge performance. In this paper the life-cycle maintenance planning of deteriorating bridges is formulated as a multiobjective optimization problem that treats the lifetime condition and safety levels as well as life-cycle maintenance cost as separate objective functions. A multiobjective genetic algorithm is used as the search engine to automatically locate a large pool of different maintenance scenarios that exhibits an optimized tradeoff among conflicting objectives. This tradeoff provides improved opportunity for bridge managers to actively select the final maintenance scenario that most desirably balances life-cycle maintenance cost, condition, and safety levels of deteriorating bridges.
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Acknowledgments
The writers gratefully acknowledge the partial financial support of the U.K. Highways Agency and of the U.S. National Science Foundation through Grant Nos. CMS-9912525 and CMS-0217290. 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 131 • Issue 5 • May 2005
Pages: 833 - 842
Copyright
© 2005 ASCE.
History
Received: Nov 11, 2003
Accepted: Sep 24, 2004
Published online: May 1, 2005
Published in print: May 2005
Notes
Note. Associate Editor: Christopher M. Foley
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