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

Polymers

Alicia Echevarria³  Arash E. Zaghi¹  Richard Christenson¹  Rachel Plank¹  Alper Ilki² 

[1] Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA; E-Mails:;id="af1-polymers-07-00876">1Structures Department, HNTB Corporation, Newark, NJ 07102, U;Structures Department, HNTB Corporation, Newark, NJ 07102, USA

关键词: reinforced concrete;    fiber reinforced polymer;    tube;    fire;    robustness;    CFFT;    bridge columns;   

DOI  :  10.3390/polym7050876

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.