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A theoretical study of force identification using prestressed concrete bridges

Chan, Tommy H.T. & Yung, T.H. (2000) A theoretical study of force identification using prestressed concrete bridges. Engineering Structures, 22(11), pp. 1529-1537.

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Abstract

A moving force identification method taking into account the effects of prestressing is presented. A 2-axle medium lorry is modelled as a set of forces, with their magnitudes either constant or time-varying, moving across a bridge model having a span length of 28 m. Results show that identified forces are identical to input forces only when no noise is added to the simulated bridge responses. The identified forces from responses which include noise are poor, even with a noise level as low as 1%. However, the identification can be greatly improved using a low-pass filter. Results also show that the identified forces are over- and underestimated, respectively, when the prestressing effects are neglected in the identification and calibration processes. Large percentage errors are also obtained when the prestressing effects are neglected in both processes. Additionally, the percentage errors decrease with decreasing prestressing forces, and do not change with the magnitude of axle forces and mass per unit length.

Impact and interest:

23 citations in Scopus
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10 citations in Web of Science®

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ID Code: 12814
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Keywords: dynamic axle loads, moving force identification, prestressed concrete bridges
DOI: 10.1016/S0141-0296(99)00087-5
ISSN: 0141-0296
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
Copyright Owner: Copyright 2000 Elsevier
Deposited On: 03 Mar 2008
Last Modified: 11 Aug 2011 04:35

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