Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29837
Title: Moving load and prestress identification using wavelet-based method
Authors: Law, SS
Wu, SQ
Shi, ZY
Keywords: Bridge
Inverse problem
Moving loads
Prestress
Regularization
Vehicle
Wavelet
Issue Date: 2008
Publisher: Asme-Amer Soc Mechanical Eng
Source: Journal of applied mechanics, transactions asme, 2008, v. 75, no. 2, p. 210141-210147 How to cite?
Journal: Journal of Applied Mechanics, Transactions ASME 
Abstract: A novel moving force and prestress identification method based on finite element and wavelet-based method for bridge-vehicle system is developed. A two-axle vehicle model and simple-supported beam with prestressing force are studied. Finite element method is flexible in modeling structures with complex boundaries while the wavelet-analysis method has the characteristic of multiresolution and the ability to detect abrupt changes. Both methods are used in this work to identify the moving loads and prestressing force from the "measured" bridge responses, which may be strain or acceleration. Numerical simulations demonstrate the efficiency of the method under the effects of measurement noise, road roughness, sampling rate, and the arrangement of sensors with good accuracy. Results indicate that the proposed method has the advantages of both high computational performance and fine identification resolution.
URI: http://hdl.handle.net/10397/29837
DOI: 10.1115/1.2793134
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