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Experimental Study of Moving Force Identification on A Continuous Bridge

Chan, Tommy H.T. & Ashebo, Demeke B. (2004) Experimental Study of Moving Force Identification on A Continuous Bridge. In Kailakin, V., Kirby, J.T., Bhattacharya, B., Yamamuro, J.A., & Shenton III, H.W. (Eds.) Journal of Vibration and Acoustics, American Society of Civil Engineers (ASCE), Newark, Delaware 19716 USA, Paper No. 52.

Abstract

This paper describes an experimental study on the identification of moving vehicle axle loads on a continuous supported bridge based on the measured bending moment responses. A bridge-vehicle system model was fabricated in the laboratory. The bridge was modeled as a three span continuous supported beam and the vehicle was modeled as a vehicle model with two-axle loads. A number of strain gauges were adhered to the bottom surface of the beam to measure the bending moment responses. Using measured bending moment responses as an input, the inverse problem was solved to identify moving loads. The moving forces were identified when considering bending moment responses from all spans of the beam and only one span respectively. The rebuilt responses were reconstructed from the identified loads as a forward problem. To study the accuracy of the method the relative percentage errors were calculated with respect to the measured and the rebuilt bending moment responses. The rebuilt bending moment responses obtained from the identified forces are in good agreement with measured bending moment responses. This indirectly shows that the method is capable of identifying moving loads on continuous supported bridges.

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ID Code: 12772
Item Type: Conference Paper
Additional Information: For more information, please refer to the publisher’s website (see hypertext link) or contact the author.
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Keywords: moving force identification, measured bending moment, rebuilt bending moment
Subjects: Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
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 2004 American Society of Civil Engineers (ASCE)
Deposited On: 03 Mar 2008
Last Modified: 10 Aug 2011 23:04

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