A Damage Detection Algorithm Utilizing Dynamic Displacement of Bridge under Moving Vehicle

Zhen Sun, Tomonori Nagayama, Di Su, Yozo Fujino

抄録

A damage detection method is proposed, which utilizes dynamic displacement of bridge structures under moving vehicle. The problem is first elaborated with closed-form solution of dynamic displacement, which is decomposed into quasi-static component and dynamic component. Dynamic curvature is defined as second derivative of the dynamic displacement for detecting damage location and estimating damage extent. Damage is modeled by local reduction of stiffness in this paper. Numerical study was conducted on a simply supported beam to verify the proposed method. Vehicle model is analyzed with Newmark's method using Matlab to obtain the contact force acting on the bridge. Beam model is established in commercial finite element software ABAQUS. The effects of road surface roughness and vehicle-bridge interaction are both considered in the analysis. In order to identify damage location and extent, dynamic curvature was calculated with midspan displacement. Parametric study on measurement noise level, damage location, damage extent, and multiple damage cases is performed, and the analysis results show both reliability and efficacy of this method in damage detection of bridge structures. At last, conclusions are drawn for its application to bridges in engineering practice.

本文言語英語
文献番号8454567
ジャーナルShock and Vibration
2016
DOI
ジャーナル掲載日出版済み - 2016

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Damage detection
ABAQUS
Surface roughness
Stiffness
Derivatives

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

これを引用

A Damage Detection Algorithm Utilizing Dynamic Displacement of Bridge under Moving Vehicle. / Sun, Zhen; Nagayama, Tomonori; Su, Di; Fujino, Yozo.

:: Shock and Vibration, 巻 2016, 8454567, 2016.

研究成果: ジャーナルへの寄稿記事

Sun, Zhen; Nagayama, Tomonori; Su, Di; Fujino, Yozo / A Damage Detection Algorithm Utilizing Dynamic Displacement of Bridge under Moving Vehicle.

:: Shock and Vibration, 巻 2016, 8454567, 2016.

研究成果: ジャーナルへの寄稿記事

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