Experimental Comparison of the Performance and Residual Capacity of CFFT and RC Bridge Columns Subjected to Blasts
Publication: Journal of Bridge Engineering
Volume 21, Issue 1
Abstract
The blast performance of concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) bridge columns was studied through a two-phase study comprised of blast and residual axial capacity experiments. Two one-fifth-scale CFFT columns and two one-fifth-scale conventional RC columns having comparable flexural capacities were subjected to distinct levels of explosive loading, causing damage but not complete failure. The blast resilience of the damaged columns was quantified by measuring the residual axial capacity of each column. The damaged CFFT columns exhibited superior strength and ductility retention compared with the damaged RC columns. Additionally, the damaged CFFT columns demonstrated a more predictable axial compressive mode of failure because the exterior FRP tube resisted the shear crack initiation observed in the damaged RC columns.
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Acknowledgments
This material is based on work supported by the U.S. Department of Homeland Security under the DHS HS–STEM Career Development Grant Award Number 2008-ST-061-TS002. Funding for the experimental work was also supplied by the National Transportation Security Center of Excellence (NTSCOE) funded by the Department of Homeland Security Centers of Excellence (COE) grant program, administered through the DHS Science and Technology Directorate (S&T) Office of University Programs (OUP). The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Department of Homeland Security. Strong support from Prof. Michael Accorsi as PI of the HS-STEM Program is greatly appreciated. Jared Minor, Larry Garrett, Clifford Grey, Arnette Nash, and many others from USACE-ERDC are thanked for the assistance they provided to make these blast tests possible. Special thanks to Matt Smith of National Oilwell Varco for donating the FRP tubes, and Peter Glaude and Serge Doyan for their machining and fabrication work. Also, the assistance provided by Masoud Mehrraoufi and Kevin Zmetra during construction and axial capacity testing is very much appreciated. Permission to publish was granted by Director, Geotechnical & Structures Laboratory.
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Published In
Journal of Bridge Engineering
Volume 21 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 5, 2014
Accepted: Dec 9, 2014
Published online: May 15, 2015
Discussion open until: Oct 15, 2015
Published in print: Jan 1, 2016
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