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Title: Strain measurement in a concrete beam by use of the Brillouin-scattering-based distributed fiber sensor with single-mode fibers embedded in glass fiber reinforced polymer rods and bonded to steel reinforcing bars
Authors: Zeng, Xiaodong
Bao, Xiaoyi
Georgiades, Tasos 
Keywords: Concrete beams
Optical fiber detectors
Glass fibers
Brillouin scattering
Issue Date: 2002
Publisher: Optical Society of America
Source: Applied Optics, 2002, Volume 41, Issue 24, Pages 5105-5114
Abstract: The strain measurement of a 1.65-m reinforced concrete beam by use of a distributed fiber strain sensor with a 50-cm spatial resolution and 5-cm readout resolution is reported. The strain-measurement accuracy is ± 15 με (μm/m) according to the system calibration in the laboratory environment with non-uniform-distributed strain and ± 5 με with uniform strain distribution. The strain distribution has been measured for one-point and two-point loading patterns for optical fibers embedded in pultruded glass fiber reinforced polymer (GFRP) rods and those bonded to steel reinforcing bars. In the one-point loading case, the strain deviations are ±7 and ±15 με for fibers embedded in the GFRP rods and fibers bonded to steel reinforcing bars, respectively, whereas the strain deviation is ±20 με for the two-point loading case.
ISSN: 00036935
DOI: 10.1364/AO.41.005105
Rights: © 2002 Optical Society of America
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