Life-Cycle Cost Analyses of a New Steel for Bridges
Authors: Nader M. Okasha, Aff.M.ASCE [email protected], Dan M. Frangopol, Dist.M.ASCE [email protected], Fred B. Fletcher [email protected], and Alex D. Wilson, M.ASCE [email protected]Author Affiliations
Publication: Journal of Bridge Engineering
Volume 17, Issue 1
Abstract
This technical note presents the computations, results, and conclusions of an analytical investigation for comparing the life-cycle cost (LCC) of a steel bridge component made of a new maintenance-free steel and the LCC of the same steel bridge component made of conventional painted carbon steel with maintenance (repainting). An approach for the LCC analysis is presented both deterministically, where different painting scenarios are considered, and probabilistically, where the uncertainties in the input variables are properly considered. Under reasonable cost assumptions, it is demonstrated that the new steel, although initially more expensive, is indeed cost-effective after approximately 15 years. The LCC-effectiveness of the new steel increases over the service life of the bridge component.
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Acknowledgments
The support of the U.S. Federal Highway Administration through contract UNSPECIFIEDDTFH61-07-00008, “Improved Corrosion Resistant Steel for Highway Bridge Construction”, is gratefully acknowledged.
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© 2012 American Society of Civil Engineers.
History
Received: Nov 3, 2010
Accepted: Jan 10, 2011
Published online: Jan 12, 2011
Published in print: Jan 1, 2012
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Affiliations
Graduate Research Assistant, Dept. of Civil and Environmental Engineering, ATLSS Center, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015-4729. E-mail: [email protected]
Professor and Fazlur R. Khan Endowed Chair of Structural Engineering and Architecture, Dept. of Civil and Environmental Engineering, ATLSS Center, Lehigh Univ., 117 ATLSS Dr. Bethlehem, PA 18015-4729 (corresponding author). E-mail: [email protected]
Principal Research Engineer, ArcelorMittal Global R&D, Coatesville, PA 19320. E-mail: [email protected]
Principal Research Engineer, ArcelorMittal Global R&D, Coatesville, PA 19320. E-mail: [email protected]
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