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Polymers 2015, 7(5), 876-895; doi:10.3390/polym7050876

Residual Axial Capacity Comparison of CFFT and RC Bridge Columns after Fire

1
Structures Department, HNTB Corporation, Newark, NJ 07102, USA
2
Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Alper Ilki and Masoud Motavalli
Received: 21 March 2015 / Revised: 20 April 2015 / Accepted: 24 April 2015 / Published: 5 May 2015

Abstract

The fire performance of protected concrete-filled fiber reinforced polymer (FRP) tube (CFFT) and conventional reinforced concrete (RC) bridge columns is studied through two phases of experimental research comprised of fire exposure and residual axial capacity tests. Two one-fifth scale CFFT columns and two one-fifth scale conventional RC columns having similar axial and flexural capacities were subjected to two durations of extreme temperature exposure. The CFFT columns were protected by the Tyfo® CFP fire protection system during the experiments. Subsequently, the post-fire robustness of the columns was quantified by measuring the residual axial capacity characteristics of each column. The protected CFFT columns exhibited superior axial strength and stiffness retention compared to the RC columns after fire exposure. View Full-Text
Keywords: reinforced concrete; fiber reinforced polymer; tube; fire; robustness; CFFT; bridge columns reinforced concrete; fiber reinforced polymer; tube; fire; robustness; CFFT; bridge columns
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Echevarria, A.; Zaghi, A.E.; Christenson, R.; Plank, R. Residual Axial Capacity Comparison of CFFT and RC Bridge Columns after Fire. Polymers 2015, 7, 876-895.

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