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Moving axle load from multi-span continuous bridge: Laboratory study

Chan, Tommy H.T. & Ashebo, Demeke B. (2006) Moving axle load from multi-span continuous bridge: Laboratory study. Journal of Vibration and Acoustics, 128(4), pp. 521-526.

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Abstract

Laboratory study on the identification of moving vehicle axle loads on a multi-span continuous bridge from the measured bending moment responses is presented. A bridge-vehicle system model was fabricated in the laboratory. The bridge was modeled as a three span continuous beam and the car 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 corresponding inverse problem was solved to identify moving loads. The moving forces were identified when considering bending moment responses from all spans of the beam. In order to avoid the lower identification accuracy around the inner supports of continuous bridge and to improve the computation efficiency, the moving force identification from the target (one selected) span of the continuous bridge was studied. 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 the measured bending moment responses. This indirectly shows that the method is capable of identifying moving loads on continuous supported bridges.

Impact and interest:

11 citations in Scopus
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5 citations in Web of Science®

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ID Code: 12708
Item Type: Journal Article
Additional Information: Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the journal’s website (see hypertext link) or contact the author.
Keywords: Author Keywords, moving axle load, bending moment responses, continuous bridge, TIME, DOMAIN METHOD, FORCE IDENTIFICATION, FREQUENCY
DOI: 10.1115/1.2202154
ISSN: 1528-8927
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 2006 ASME
Deposited On: 28 Feb 2008
Last Modified: 29 Feb 2012 23:53

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