Abstract
The behavior of engineering structures in fire is commonly studied through large-scale experiments. Full-field, noncontact measurement techniques such as Digital Image Correlation (DIC) are potentially ideal for such experiments; however, the presence of light emitted by the flames, thermal radiation from the heated structure, and convective thermal gradients in the air make this a challenging application for DIC. A simple method has been developed to enable the use of DIC in large, low-soot, fires using narrow-spectrum blue light and spectrally-matched bandpass optical filters to increase signal-to-noise ratio and filter undesired radiant energy before it reaches the camera. The method is applied to full-scale experiments in which a 6-m long W16 × 26 steel beam is supported over a 700 kW fire from a natural gas diffusion burner. The resulting images are temporally and spatially averaged during post-processing to smooth out false distortions of the images caused by the thermal gradients in and around the flames before DIC techniques are applied to resolve strain.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
McAllister, T., Luecke, W., Iadicola, M., Bundy, M.: Measurement of temperature, displacement, and strain in structural components subject to fire effects: concepts and candidate approaches. (2012). https://doi.org/10.6028/NIST.TN.1768
Grant, B.M.B., Stone, H.J., Withers, P.J., Preuss, M.: High-temperature strain field measurement using digital image correlation. J. Strain Anal. Eng. Design. 44, 263–271 (2009). https://doi.org/10.1243/03093247JSA478
Pan, B., Wu, D., Wang, Z., Xia, Y.: High-temperature digital image correlation method for full-field deformation measurement at 1200 °C. Meas. Sci. Technol. 22, 15701 (2011). https://doi.org/10.1088/0957-0233/22/1/015701
Smith C.M., Hoehler M.: Imaging through fire using narrow-spectrum illumination. Fire Technology. Posted online July 23, (2018). https://doi.org/10.1007/s10694-018-0756-5
Ballantyne, A., Bray, K.N.C.: Investigations into the structure of jet diffusion flames using time-resolved optical measuring techniques. Symp. Combust. 16, 777–787 (1977). https://doi.org/10.1016/S0082-0784(77)80371-8
Buckmaster, J., Peters, N.: The infinite candle and its stability—a paradigm for flickering diffusion flames. Symp. Combust. 21, 1829–1836 (1988). https://doi.org/10.1016/S0082-0784(88)80417-X
Choe, L., Ramesh, S., Hoehler, M., et al.: National fire research laboratory commissioning project: testing steel beams under localized fire exposure. (2018). https://doi.org/10.6028/NIST.TN.1983
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Smith, C.M., Hoehler, M.S. (2019). Application of Digital Image Correlation to Structures in Fire. In: Lamberti, L., Lin, MT., Furlong, C., Sciammarella, C., Reu, P., Sutton, M. (eds) Advancement of Optical Methods & Digital Image Correlation in Experimental Mechanics, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-97481-1_19
Download citation
DOI: https://doi.org/10.1007/978-3-319-97481-1_19
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-97480-4
Online ISBN: 978-3-319-97481-1
eBook Packages: EngineeringEngineering (R0)