Experimental Analysis of Steel Beams Subjected to Fire Enhanced by Brillouin Scattering-Based Fiber Optic Sensor Data
Publication: Journal of Structural Engineering
Volume 143, Issue 1
Abstract
This paper presents high temperature measurements using a Brillouin scattering-based fiber optic sensor and the application of the measured temperatures and building code recommended material parameters into enhanced thermomechanical analysis of simply supported steel beams subjected to combined thermal and mechanical loading. The distributed temperature sensor captures detailed, nonuniform temperature distributions that are compared locally with thermocouple measurements with less than 4.7% average difference at 95% confidence level. The simulated strains and deflections are validated using measurements from a second distributed fiber optic (strain) sensor and two linear potentiometers, respectively. The results demonstrate that the temperature-dependent material properties specified in the four investigated building codes lead to strain predictions with less than 13% average error at 95% confidence level and that the Europe building code provided the best predictions. However, the implicit consideration of creep in Europe is insufficient when the beam temperature exceeds 800°C.
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Acknowledgments
This work was funded by the National Institute of Standards and Technology (NIST) under Award No. 70NANB13H183. The contents of this paper reflect the views of the authors and do not necessarily reflect the official views or policies of NIST. Certain commercial equipment, instruments, or materials are identified in this paper to specify the experimental procedure. Such identification is not intended to imply recommendation or endorsement by NIST nor to imply the materials or equipment are necessarily the best available for the purpose.
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Information
Published In
Journal of Structural Engineering
Volume 143 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 10, 2015
Accepted: May 31, 2016
Published online: Jul 25, 2016
Discussion open until: Dec 25, 2016
Published in print: Jan 1, 2017
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