Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34525
Title: Strain monitoring in composite-strengthened concrete structures using optical fibre sensors
Authors: Lau, KT 
Chan, CC
Zhou, LM 
Jin, W 
Keywords: Optical fibre
Issue Date: 2001
Publisher: Elsevier
Source: Composites part B : engineering, 2001, v. 32, no. 1, p. 33-45 How to cite?
Journal: Composites part B : engineering
Abstract: In this paper, the mechanical behaviour of the composite-strengthened concrete structures is addressed. Optical fibre sensor presents a great deal of potential in monitoring the structural health condition of civil infrastructure elements after strengthening by externally bonded composite materials. The use of embedded optical fibre sensor for strain and temperature monitoring enables to reveal the status of the composite-strengthened structure in real-time remotely. In this paper, an experimental investigation on the composite-strengthened concrete structures with the embedment of fibre-optic Bragg grating (FBG) sensors is presented. Single- and multiplexed-point strain measuring techniques were used to measure strains of the structures. Frequency modulated continuous wave (FMCW) method was used to measure strains in different points of the structure with using only one single optical fibre. All strains measured from the sensors were compared to conventional surface mounted strain gauges. Experimental results show that the use of the embedded FBG sensor can measure strain accurately and provide information to the operator that the structure is subjected to debond or micro-crack failure. Multiplexed FBG strain sensors enable to measure strain in different locations by occupying only one tiny optical fibre. Reduction of strength in composite laminate is resulted if the embedded optical fibre is aligned perpendicular to the load-bearing direction of the structure.
URI: http://hdl.handle.net/10397/34525
ISSN: 1359-8368
DOI: 10.1016/S1359-8368(00)00044-5
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

35
Last Week
0
Last month
Citations as of Apr 26, 2017

Page view(s)

19
Last Week
2
Last month
Checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.