Theoretical investigation of the use of a moving vehicle to identify bridge dynamic parameters

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Title: Theoretical investigation of the use of a moving vehicle to identify bridge dynamic parameters
Authors: McGetrick, P.
González, Arturo
O'Brien, Eugene J.
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Date: Aug-2009
Abstract: Pavements and bridges are subject to a continuous degradation due to traffic aggressiveness, ageing and environmental factors. A rational transport policy requires the monitoring of this transport infrastructure in order to provide adequate maintenance and guarantee the required levels of transport service and safety. This paper investigates the use of an instrumented vehicle fitted with accelerometers on its axles to monitor the dynamics of bridges. A simplified quarter car-bridge interaction model is used in theoretical simulations and the natural frequency of the bridge is extracted from the spectra of the vehicle accelerations. The accuracy is better at lower speeds and for smooth road profiles. The structural damping of the bridge was also monitored for smooth and rough road profiles. The magnitude of peaks in the power spectral density of the vehicle accelerations decreased with increasing bridge damping and this decrease was easier to detect the smoother the road profile.
Funding Details: European Research Council
Type of material: Journal Article
Publisher: British Institute of Non-Destructive Testing
Keywords: VehicleBridgeDynamicDamage detectionCondition monitoringRoad profile
Subject LCSH: Structural health monitoring
Bridges--Live loads
DOI: 10.1784/insi.2009.51.8.433
Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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