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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