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Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost
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.
Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost
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.
Bridge management strategy for a steel plate girder bridge based on minimum total life cycle cost
Kaito, Kiyoyuki (author) / Abe, Makoto (author) / Koide, Yasuhiro (author) / Fujino, Yozo (author)
Health Monitoring and Management of Civil Infrastructure Systems ; 2001 ; Newport Beach,CA,United States
Proc. SPIE ; 4337
2001-08-03
Conference paper
Electronic Resource
English
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