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Damage assessment in multiple-girder composite bridge using vibration characteristics

Shih, Hoi Wai, Thambiratnam, David P., & Chan, Tommy H.T. (2009) Damage assessment in multiple-girder composite bridge using vibration characteristics. In The Second Infrastructure Theme Postgraduate Conference : Rethinking Sustainable Development: Planning, Engineering, Design and Managing Urban Infrastructure, 26 March 2009, Queensland University of Technology, Brisbane.

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Abstract

This paper uses dynamic computer simulation techniques to apply a procedure using vibration-based methods for damage assessment in multiple-girder composite bridge. In addition to changes in natural frequencies, this multi-criteria procedure incorporates two methods, namely the modal flexibility and the modal strain energy method. Using the numerically simulated modal data obtained through finite element analysis software, algorithms based on modal flexibility and modal strain energy change before and after damage are obtained and used as the indices for the assessment of structural health state. The feasibility and capability of the approach is demonstrated through numerical studies of proposed structure with six damage scenarios. It is concluded that the modal strain energy method is competent for application on multiple-girder composite bridge, as evidenced through the example treated in this paper.

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ID Code: 26741
Item Type: Conference Paper
Keywords: bridges, damage detection, finite element method, modal analysis, flexibility, strain energy
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 Queensland University of Technology
Deposited On: 10 Aug 2009 11:58
Last Modified: 09 Jun 2010 23:56

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