Life Span Estimation of Road Bridges Based on Practices of Bridge Replacement

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  • Sato Yoshifumi
    Graduate School of Advanced Technology and Sciense.,The University of Tokushima
  • Nagao Fumiaki
    Prof,Institute of Technology and Science.,The University of Tokushima.,Dr.of Engineering
  • Noda Minoru
    Assoc,Prof,Institute of Technology and Science.,The University of Tokushima.,Dr.of Engineering

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Other Title
  • 道路橋の架替実態調査に基づいた寿命評価
  • ドウロキョウ ノ カケカエ ジッタイ チョウサ ニ モトズイタ ジュミョウ ヒョウカ

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<p>The objective of bridge management is to allocate and use the limited resources balancing between lifetime reliability and life-cycle cost in an optimal manner. In this paper, estimation of the road bridge's life span based on practices of bridges replacement was attempted and the survival curve of the bridges was also estimated by KaplanMeier's method. We suggested a new bridge management method by using the modern portfolio theory in financial engineering and a evaluation of promotion efficiency of renewal of the future bridge.</p>

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