Experimental Testing of a Moving Force Identification Bridge Weigh-in-Motion Algorithm

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Title: Experimental Testing of a Moving Force Identification Bridge Weigh-in-Motion Algorithm
Authors: Rowley, C.
O'Brien, Eugene J.
González, Arturo
et al.
Permanent link: http://hdl.handle.net/10197/4853
Date: 18-Nov-2008
Abstract: Bridge weigh-in-motion systems are based on the measurement of strain on a bridge and the use of the measurements to estimate the static weights of passing traffic loads. Traditionally, commercial systems employ a static algorithm and use the bridge influence line to infer static axle weights. This paper describes the experimental testing of an algorithm based on moving force identification theory. In this approach the bridge is dynamically modeled using the finite element method and an eigenvalue reduction technique is employed to reduce the dimension of the system. The inverse problem of finding the applied forces from measured responses is then formulated as a least squares problem with Tikhonov regularization. The optimal regularization parameter is solved using the L-curve method. Finally, the static axle loads, impact factors and truck frequencies are obtained from a complete time history of the identified moving forces.
Type of material: Journal Article
Publisher: Springer-Verlag
Copyright (published version): 2008 Springer-Verlag
Keywords: Bridge;Weigh-in-motion;Force identification;Regularization;Dynamic programming;Traffic loads
DOI: 10.1007/s11340-008-9188-3
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection

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