Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost

Kiyoyuki Kaito; Makoto Abe; Yasuhiro Koide; Yozo Fujino

doi:10.1117/12.435592

3 August 2001 Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost

Kiyoyuki Kaito, Makoto Abe, Yasuhiro Koide, Yozo Fujino

Proceedings Volume 4337, Health Monitoring and Management of Civil Infrastructure Systems; (2001) https://doi.org/10.1117/12.435592
Event: 6th Annual International Symposium on NDE for Health Monitoring and Diagnostics, 2001, Newport Beach, CA, United States

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.

Citation Download Citation

Kiyoyuki Kaito, Makoto Abe, Yasuhiro Koide, and Yozo Fujino "Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost", Proc. SPIE 4337, Health Monitoring and Management of Civil Infrastructure Systems, (3 August 2001); https://doi.org/10.1117/12.435592

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