Measuring Temperature Distribution in Steel-Concrete Composite Slabs Subjected to Fire using Brillouin Scattering based Distributed Fiber Optic Sensors

Abstract

This study investigates temperature distributions in steel-concrete composite slabs subjected to fire using distributed fiber optic sensors. Several 1.2 m × 0.9 m composite slabs instrumented with telecommunication-grade single-mode fused silica fibers were fabricated and subjected to fire for over 3 hours. Temperatures were measured at centimeter-scale spatial resolution by means of pulse pre-pumped Brillouin optical time domain analysis. The distributed fiber optic sensors operated at material temperatures higher than 900 °C with adequate sensitivity and accuracy to allow structural performance assessment, demonstrating their effective use in structural fire applications. The measured temperature distributions indicate a spatially-varying, fire-induced thermal response in steel-concrete composite slab, which can only be adequately captured using approaches that provide high data point density.

Meeting Name

9th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII-9 (2019: Aug. 4-7, St. Louis, MO)

Department(s)

Civil, Architectural and Environmental Engineering

Comments

National Institute of Standards and Technology, Grant 70NANB13H183

International Standard Book Number (ISBN)

978-000000000-2

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Publication Date

07 Aug 2019

Link to Full Text

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