Application of Laser Measurement to the Drive-by Inspection of Bridges

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Title: Application of Laser Measurement to the Drive-by Inspection of Bridges
Authors: Malekjafarian, Abdollah
O'Brien, Eugene J.
Permanent link: http://hdl.handle.net/10197/7049
Date: 27-May-2015
Abstract: This paper introduces the application of laser vibrometer measurements to the drive-by inspection of bridges. Drive-by methods usually process the acceleration response measured from an accelerometer installed on a vehicle passing over a bridge. In this paper, two laser vibrometers and two accelerometers are installed on the vehicle to measure a rela-tive velocity between the bridge and vehicle and the vehicle acceleration. The vehicle velocity is removed from the relative velocity by subtracting the time integration of the vehicle accel-eration. It is shown by subtracting two following bridge spatial velocities at moving coordi-nates, that the spatial velocity of the road roughness can be removed. As a result, the bridge velocity at the moving coordinate is obtained. By applying the FFT to the bridge velocity, the fundamental frequency of the bridge is visible in the spectrum.
Funding Details: Irish Research Council
Type of material: Conference Publication
Publisher: National Technical University of Athens (NTUA)
Keywords: Bridge;Inspection;Drive-by;Indirect;Laser vibrometer
Language: en
Status of Item: Peer reviewed
Is part of: M. Papadrakasis, V. Papadopoulos, V. Plevris (eds). Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering 2015
Conference Details: 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Crete Island, Greece, 25 - 27 May, 2015
Appears in Collections:Civil Engineering Research Collection

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