Validation of usefulness of damage identification method using deflection influence line based on experimental data

DOI
  • Maruyama Kohei
    東京都市大学 総合理工学研究科建築都市専攻博士後期課程
  • Yoshida Ikumasa
    東京都市大学 建築都市デザイン学部都市工学科
  • Sekiya Hidehiko
    東京都市大学 建築都市デザイン学部都市工学科
  • Kim Chul-Woo
    京都大学 大学院工学研究科社会基盤工学専攻

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Other Title
  • たわみ影響線を用いた損傷同定手法の実験データに基づく有用性検証

Description

<p>The damage identification method using deflection influence line (DIL) is studied based on measured data in a damaged bridge model. Since the damage on the girders reduces the bending stiffness, a correction factor (CF) for bending stiffness is introduced as a damage index. DIL of the damaged bridge model is estimated based on MAP (Maximum A Posterior) estimation. Hyperparameters necessary for estimating the CF are calculated by maximization of marginal likelihood. Although the use of DIL calculated by MAP estimation with prior information improves the accuracy of identification of the damage locations, it is possible that the damage locations and their level are roughly identified without the prior information.</p>

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