期刊
SENSORS
卷 20, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/s20195518
关键词
composite structure; distributed fiber optic sensors; fiber optic sensors; fire; high temperature; temperature distribution
资金
- Stevens Institute of Technology, Missouri University of Science and Technology
- National Institute of Standards and Technology (NIST) [70NANB13H183]
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 x 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 degrees 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.
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