Fibre optic sensors for high temperatures and fire scenarios

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ConferenceFirst Middle East Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2011): 08 February 2011, Dubai, UAE
Pages28; # of pages: 7
AbstractIn both industrial applications and fire scenarios, sensing may be required at very high temperatures. Such sensing could be used to monitor and control equipment in industrial situations or to provide an emergency management system in a structural fire. Conventional fibre optic sensors (FOS), however, are limited to relatively low temperatures. Thus, this paper discusses the development of technology for fibre optic sensing at high temperatures.FOS with a special coating for resisting high temperatures is being employed to measure temperatures and strains on fibre reinforced polymer (FRP) tensile coupons. These sensors are attached to the coupons and tested in a special high temperature material testing facility at Queen?s University. This test facility can perform well-controlled tests up to 600°C with a load capacity of 600 kN. The stimulated Brillioun scattering method (SBS) is used to interpret the measurements. Using Optical Frequency Domain Reflectometry (OFDR) on data collected from carbon coated fibres, a relationship between strains and the optical wavelength shifts is discovered. In addition to FOS, the particle image velocimetry (PIV) method is used to determine the state of strain and deformation in the coupons.To illustrate the potential application in a structure, two full-scale T-beams (4 m span) are constructed with FOS attached to the internal longitudinal reinforcement. These T-beams are strengthened with external FRP, and fire protection for the FRP is provided by sprayed insulation. These beams are then exposed to a standard ASTM fire while under sustained loading.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number53921
NPARC number20373812
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Record identifieref3ddc86-7a7c-410c-9dd4-750faa43ced2
Record created2012-07-23
Record modified2016-05-09
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