Moving Force Identification from Bridge Strain Responses

Yu, Ling & Chan, Tommy H.T. (2001) Moving Force Identification from Bridge Strain Responses. In Journal of Sound and Vibration, Florida, USA, pp. 1420-1426.


Accurate identification of moving forces in bridge is an important issue from the aspects of design, control and diagnosis of bridges. Previous studies show that the identification results will often be highly sensitive to changes in parameters of both the bridge and vehicle. The different solutions to an equation ,4x = b, the over-determined system in the force identification, give results with different accuracy, particular when the systematic matrix A is close to rank deficient. Based on the time domain method (TDM) and frequency-time domain method (FTDM), this paper aims to evaluate the two solutions to the system equation, i.e. direct pseudo inversion (PI) solution and the singular value decomposition (SVD) solution. The effects of various parameters on both the TDM and FfDM are also discussed. Assessment results show that the moving force identification from the bridge strain responses is feasible and acceptable, but there exists different influence on the TDM and FTDM by means of the two solutions. The SVD solution can effectively improve the identification accuracy of the two methods, particular for the FTDM.

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ID Code: 12864
Item Type: Conference Paper
Refereed: Yes
Additional Information: For more information, please contact the author.
Keywords: moving force identification, weigh, in, motion, bridges, loadings
Subjects: 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 2001 (please consult author)
Deposited On: 04 Mar 2008 00:00
Last Modified: 10 Aug 2011 18:34

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