BASIC STUDY ON EVALUATION OF STIFFNESS OF BRIDGE USING INFLUENCE LINE
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- MARUYAMA Kohei
- 東京都市大学 総合理工学研究科
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- YOSHIDA Ikumasa
- 東京都市大学 建築都市デザイン学部都市工学科
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- SEKIYA Hidehiko
- 東京都市大学 建築都市デザイン学部都市工学科
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- KIM Chul-Woo
- 京都大学 工学研究科社会基盤工学専攻
Bibliographic Information
- Other Title
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- 影響線を用いた橋梁の剛性評価に関する基礎検討
Abstract
<p> This study proposed a method for estimating the damage locations and damage levels of bridge girders based on the deflection influence lines. The correction coefficients for flexural rigidities are estimated based on numerical analysis using a bending beam. Two types of objective functions are presented based on the concept of Bayesian inference (MAP estimation). Correction factors for flexural rigidities are estimated for the scenarios of local damage and overall damage. For local damage, the object function that provides prior information on the correction coefficients themselves gave better results. For the overall damage, an object function that provides the prior on the difference between the correction coefficient gave better results. Using Hessian matrices, we evaluated the uncertainty in the estimates and the correlation coefficients among the flexural rigidities, and quantified the estimation accuracy. White noise of 1% or 2% of the maximum amplitude of the influence line was considered as an observation error. The multiple measurements are required to obtain acceptable level of accuracy.</p>
Journal
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- Infrastructure Maintenance Practices
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Infrastructure Maintenance Practices 2 (1), 158-168, 2023
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390295181711553792
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- ISSN
- 2436777X
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Allowed