Structures Congress 2018
Experimental Study on Long-Span Composite Floor Beams Subject to Fire: Baseline Data at Ambient Temperature
Publication: Structures Congress 2018: Buildings and Disaster Management
ABSTRACT
The National Institute of Standards and Technology recently expanded its large-scale structural-fire testing capabilities in the National Fire Research Laboratory. A landmark test series is being conducted on long-span steel-concrete composite floor beams designed and constructed following U.S. building codes and standards. The test program consists of five 12.8 m span composite beams with one of two types of shear connections: bolted/welded double-angle connections or single plate shear connections. Two of the five specimens have slab continuity at the beam ends. This paper presents the results from a recent test on the composite beam conducted at ambient temperature. The experimentally measured behavior and flexural moment capacity will be used as a baseline to compare with the composite beams still to be tested under combined mechanical and fire load. The datasets produced are providing technical information necessary to advance performance-based design of composite floor systems in steel-framed buildings subject to fire.
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ACKNOWLEDGEMENTS
The support of numerous NIST colleagues on this work is acknowledged and greatly appreciated: Brian Story, Anthony Chakalis, Laurean DeLauter, Philipp Deardorff, Matthew Bundy, Artur Chernovsky, Doris Rinehart, Chao Zhang, Mina Seif, Qi Li, Ana Sauca, Dale Bentz, Scott Jones, Timothy Barrett, Max Peltz, Kevin McGrattan, Morgan Bruns, Randy Shields, Fahim Sadek, Joe Main, Jonathan Weigand, and Jian Jiang. The authors would like to thank Alana Guzetta of US Concrete who prepared the concrete mix design, as well as Roberto Talavera of Superior Concrete who supervised the casting. Expertise on fiber optic instrumentation was provided by Genda Chen, Yi Bao, Steve Guo, Matthew Klegseth, Branko Glisic, and John Reilly.
REFERENCES
Alfawakhri, F., Carter, C., Berhing, R., Zeeveld, P., Hervey, F., & Woods, L. (2016). “The Effects of Load Intensity and Restraint on the Fire Resitance of Steel and Composite Beams”, proc of the 9thInternational Conf. Structures in Fire, Princeton, NJ.
ASTM International. (2017) “Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens”, ASTM. C39/C39M – 17b, ASTM International, West Conshohocken, PA, 2017
ASTM International. (2016) “Standard Test Methods for Tension Testing of Metallic Materials”, ASTM.E8/E8M-16a, ASTM International, West Conshohocken, PA, 2016.
Choe, L., Ramesh, S., Hoehler, M., Seif, M., Bundy, M., Zhang, C., and Gross, J. (2017). “National Fire Research Laboratory Commissioning Project: Testing Steel Beams under Localized Fire Exposure”, NIST TN 1977. https://doi.org/10.6028/NIST.TN.1977
Flint, G., Lamont, S., Lane, B., Sarrazin, H., Lim, L., Rini, D., and Roben, C. (2013). “Recent lessons learned in structural fire engineering for composite steel structures”, Fire Technology, 49(3), 767–792.
NIST (2008). Final Report on the Collapse of World Trade Center Building 7, Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1A)
Selden, K. L., Fischer, E. C., & Varma, A. H. (2015). “Experimental investigation of composite beams with shear connections subjected to fire loading”. Journal of Structural Engineering, 142(2), 04015118.
Wellman, E. I., Varma, A. H., Fike, R., and Kodur, V. (2011). “Experimental evaluation of thin composite floor assemblies under fire loading. Journal of Structural Engineering”, 137(9), 1002–1016.
Information & Authors
Information
Published In
Structures Congress 2018: Buildings and Disaster Management
Pages: 129 - 139
Editor: James Gregory Soules, 1CB&I
ISBN (Online): 978-0-7844-8132-5
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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