The feasibility of using Laser Doppler Vibrometer measurements from a passing vehicle for bridge damage detection

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Title: The feasibility of using Laser Doppler Vibrometer measurements from a passing vehicle for bridge damage detection
Authors: Malekjafarian, Abdollah
Martinez, Daniel
O'Brien, Eugene J.
Permanent link: http://hdl.handle.net/10197/9539
Date: 16-May-2018
Abstract: Bridges play an important role in transport infrastructure and it is necessary to frequently monitor them. Current vibration-based bridge monitoring methods in which bridges are instrumented using several sensors are sometimes not sensitive enough. For this reason, an assessment of sensitivity of sensors to damage is necessary. In this paper a sensitivity analysis to bridge flexural stiffness (EI) is performed. A discussion between the use of strain or deflections is provided. A relation between deflection and stiffness can be set by theorem of virtual work, expressing the problem as a matrix product. Sensitivity is obtained by deriving the deflection respect to the reciprocal of the stiffness at every analysed location of the bridge. It is found that a good match between the deflection and the bridge stiffness profile can be obtained using noise-free measurements. The accuracy of sensors is evaluated numerically in presence of damage and measurement noise. Field measurements in the United States are also described to identify the potential issues in real conditions.
Funding Details: European Commission Horizon 2020
Type of material: Journal Article
Publisher: Hindawi
Journal: Shock and Vibration
Volume: 2018
Start page: 1
End page: 10
Copyright (published version): 2018 the Authors
Keywords: BridgeDrive-byDamage detectionStructural health monitoringInstantaneous curvatureRate of instantaneous curvature
DOI: 10.1155/2018/9385171
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection
TRUSS-ITN Research Collection

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