Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29022
Title: Comparative study on the elongation measurement of a soil nail using optical lower coherence interferometry method and FBG method
Authors: Hong, CY
Yin, JH 
Jin, W 
Wang, C
Zhou, WH
Zhu, HH
Keywords: Elongation
Optical fiber sensor
Pullout
Soil nail
Strain
Issue Date: 2010
Publisher: Multi-Science
Source: Advances in structural engineering, 2010, v. 13, no. 2, p. 309-319 How to cite?
Journal: Advances in structural engineering 
Abstract: Optical fiber sensor has gained popularity for structural monitoring in recent decades. Studies on the monitoring for geotechnical structures with fully-distributed fiber sensors, however, are quite limited. In this study, the fully-distributed Lower Coherence Interferometry (LCI) sensors and quasi-distributed Fiber Bragg Grating (FBG) sensors are applied for measuring the strain distribution of a soil nail as a slender structure during pullout test. First, this paper introduces an innovative calibration method for the LCI system. Second, the paper describes the procedures of fiber instrumentation on soil nail. Third, the measured results by LCI technology and FBG technology are compared to study the strain distribution and friction resistance of soil nail during pullout test. Comparative study from test results indicates the characteristics of strain distribution and resistance contribution for different parts of soil nail. Through this study, the advantages and limitations of two sensing technologies are examined.
URI: http://hdl.handle.net/10397/29022
ISSN: 1369-4332
EISSN: 2048-4011
DOI: 10.1260/1369-4332.13.2.309
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