Temperature and Strain Measurements with Fiber Optic Sensors for Steel Beams Subjected to Fire

Published

June 10, 2016

Author(s)

Yi Bao, Yizheng Chen, Matthew Hoehler, Christopher M. Smith, Matthew Bundy, Genda Chen

Abstract

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.

Proceedings Title

9th International Conference on Structures in Fire SiF’16

Conference Dates

June 8-10, 2016

Conference Location

Princeton, NJ, US

Pub Type

Conferences

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Keywords

fire, fiber optic sensors, Fabry-Perot interferometric sensor, Brillouin scattering

Citation

Bao, Y. , Chen, Y. , Hoehler, M. , Smith, C. , Bundy, M. and Chen, G. (2016), Temperature and Strain Measurements with Fiber Optic Sensors for Steel Beams Subjected to Fire, 9th International Conference on Structures in Fire SiF’16, Princeton, NJ, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920538 (Accessed April 19, 2024)