Detailed information about temperature distribution can be important to understand structural behavior in fire. This study develops a method to image three-dimensional temperature distributions in steel–concrete composite slabs using distributed fiber optic sensors. The feasibility of the method is explored using six 1.2 m × 0.9 m steel–concrete composite slabs instrumented with distributed sensors and thermocouples subjected to fire for over 3 h. Dense point clouds of temperature in the slabs were measured using the distributed sensors. The results show that the distributed sensors operated at material temperatures up to 960◦C with acceptable accuracy for many structural fire applications. The measured non-uniform temperature distributions indicate a spatially distributed thermal response in steel–concrete composite slabs, which can only be adequately captured using approaches that provide a high density of through-depth data points.
Y. Bao et al., "Measuring Three-Dimensional Temperature Distributions in Steel-Concrete Composite Slabs Subjected to Fire using Distributed Fiber Optic Sensors," Sensors, vol. 20, no. 19, pp. 1-19, MDPI, Oct 2020.
The definitive version is available at https://doi.org/10.3390/s20195518
Civil, Architectural and Environmental Engineering
INSPIRE - University Transportation Center
Keywords and Phrases
Composite structure; Distributed fiber optic sensors; Fiber optic sensors; Fire; High temperature; Temperature distribution
International Standard Serial Number (ISSN)
Article - Journal
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01 Oct 2020