TY - JOUR
T1 - Experimental Analysis of Steel Beams Subjected to Fire Enhanced by Brillouin Scattering-Based Fiber Optic Sensor Data
AU - Bao, Yi
AU - Chen, Yizheng
AU - Hoehler, Matthew S.
AU - Smith, Christopher M.
AU - Bundy, Matthew
AU - Chen, Genda
N1 - Publisher Copyright:
© 2016 American Society of Civil Engineers.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 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.
AB - 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.
KW - Distributed fiber optic sensors
KW - Fire
KW - Nonuniform temperature distribution
KW - Steel beams
KW - Structural safety and reliability
KW - Thermo-mechanical analysis
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U2 - 10.1061/(ASCE)ST.1943-541X.0001617
DO - 10.1061/(ASCE)ST.1943-541X.0001617
M3 - Article
AN - SCOPUS:85009160063
SN - 0733-9445
VL - 143
JO - Journal of Structural Engineering (United States)
JF - Journal of Structural Engineering (United States)
IS - 1
M1 - 04016143
ER -