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Experimental Analysis of Steel Beams Subjected to Fire Enhanced by Brillouin Scattering-Based Fiber Optic Sensor Data
| 题名： | Experimental Analysis of Steel Beams Subjected to Fire Enhanced by Brillouin Scattering-Based Fiber Optic Sensor Data |
| 正文语种： | 英文 |
| 作者： | Yi Bao, S.M.ASCE; Yizheng Chen; Matthew S. Hoehler, M.ASCE; Christopher M. Smith, M.ASCE; Matthew Bundy; Genda Chen, F.ASCE |
| 作者单位： | Missouri Univ;National Institute of Standards and Technology |
| 关键词： | Steel beams; Thermo-mechanical analysis; Nonuniform temperature distribution; Distributed fiber optic sensors; Fire; Structural safety and reliability. |
| 摘要： | 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. DOI: 10.106l/(ASCE)ST.1943-541X.0001617. © 2016 American Society of Civil Engineers. |
| 出版日期： | 2017.01 |
| 出版年： | 2017 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.143 |
| 期： | NO.01 |
| 页码： | 04016143 |
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