This paper presents measurements of high temperatures using a Brillouin scattering based fiber optic sensor and large strains using an extrinsic Fabry-Perot interferometric sensor for assessing the thermo-mechanical behaviors of simply supported steel beams subjected to combined thermal and mechanical loading. The distributed fiber optic sensor captures detailed, non- uniform temperature distributions that are compared with thermocouple measurements resulting in an average relative difference of less than 5 % at 95 % confidence level. The extrinsic Fabry- Perot interferometric sensor captures large strains at temperatures above 1000 C. The strain results measured from the distributed fiber optic sensors and extrinsic Fabry-Perot interferometric sensors were compared, and the average relative difference was less than 10 % at 95 % confidence level.

Meeting Name

9th International Conference on Structures in Fire SiF'16 (2016: Jun. 8-10, Princeton, NJ)


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Fire; Fiber Optic Sensors; Fabry-Perot Interferometric Sensor; Brillouin Scattering

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2016 National Institute of Standards and Technology (NIST), All rights reserved.

Publication Date

01 Jun 2016