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Proceedings Paper

Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost
Author(s): Kiyoyuki Kaito; Makoto Abe; Yasuhiro Koide; Yozo Fujino
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Paper Abstract

In this study, a bridge management strategy based on minimization of the total cost during considered years is discussed. As an example, a 50-years old steel railway plate girder bridge in Japan is selected. For this bridge, the following three strategies are considered: A. to demolish the bridge and to build a new one as a replacement and, B. to continue ordinary maintenance work with no major rehabilitation work, C. to make a diagnosis of the existing bridge and to rehabilitate it. It is shown that the management strategy C in which the existing bridge continues to be used after the appropriate reinforcement based upon the detailed diagnosis is the most effective when the annual social discount ratio is less than 5%. Furthermore, sensitivity analysis is carried out to understand the effect of uncertainties of various parameters on the total cost. Bootstrap analysis where the discount ratio is treated as a randomly fluctuating variable indicates that the total cost based on Strategy C is least influenced among three strategies because of small potential investment in the future.

Paper Details

Date Published: 3 August 2001
PDF: 9 pages
Proc. SPIE 4337, Health Monitoring and Management of Civil Infrastructure Systems, (3 August 2001); doi: 10.1117/12.435592
Show Author Affiliations
Kiyoyuki Kaito, Columbia Univ. (Japan)
Makoto Abe, BMC Corp. (Japan)
Yasuhiro Koide, BMC Corp. (Japan)
Yozo Fujino, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 4337:
Health Monitoring and Management of Civil Infrastructure Systems
Steven B. Chase; A. Emin Aktan, Editor(s)

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