DOI QR코드

DOI QR Code

Post-heating behavior of concrete beams reinforced with fiber reinforced polymer bars

  • Irshidat, Mohammad R. (Department of Civil Engineering, Jordan University of Science and Technology) ;
  • Haddad, Rami H. (Department of Civil Engineering, Jordan University of Science and Technology) ;
  • Almahmoud, Hanadi (Department of Civil Engineering, Jordan University of Science and Technology)
  • 투고 : 2014.07.09
  • 심사 : 2015.01.16
  • 발행 : 2015.03.25

초록

The present paper investigates the post heating behavior of concrete beams reinforced with fiber reinforced polymer (FRP) bars, namely carbon fiber reinforced polymer (CFRP) bars and glass fiber reinforced polymer (GFRP) bars. Thirty rectangular concrete beams were prepared and cured for 28 days. Then, beams were either subjected (in duplicates) to elevated temperatures in the range (100 to $500^{\circ}C$) or left at room temperature before tested under four point loading for flexural response. Experimental results showed that beams, reinforced with CFRP and GFRP bars and subjected to temperatures below $300^{\circ}C$, showed better mechanical performance than that of corresponding ones with conventional reinforcing steel bars. The results also revealed that ultimate load capacity and stiffness pertaining to beams with FRP reinforcement decreased, yet their ultimate deflection and toughness increased with higher temperatures. All beams reinforced with FRP materials, except those post-heated to $500^{\circ}C$, failed by concrete crushing followed by tension failure of FRP bars.

키워드

참고문헌

  1. Abbasi, A. and Hogg, P.J. (2006), "Fire testing of concrete beams with fibre reinforced plastic rebar", Composites Part A: Applied Science and Manufacturing, 37(8), 1142-1150. https://doi.org/10.1016/j.compositesa.2005.05.029
  2. ACI Committee 318 (2011), Building Code Requirements for Structural Concrete, American Concrete Institute, (ACI 318M-11) Farmington Hills, Mich., USA.
  3. Alkhrdaji, T., Wideman, M., Belarbi, A., and Nanni, A. (2001), "Shear strength of GFRP RC beams and slabs", Proceedings of the International Conference, Composites in Construction-CCC, 409-14.
  4. Almusallam, T.H., Al-Salloum, Y.A., Saleh, H.A. and Amjad, M.A. (1997), "Behavior of concrete beams doubly reinforced by FRP bars", Proceedings of the Thrd International Symposium.
  5. Alsayed, S.H. and Alhozaimy, A.M. (1999), "Ductility of concrete beams reinforced with FRP bars and steel fibers", J. Compos. Mater., 33(19), 1792-1806. https://doi.org/10.1177/002199839903301902
  6. Ashour, A.F. and Kara, I.F. (2014), "Size effect on shear strength of FRP reinforced concrete beams", Compos. Part B: Eng., 60, 612-620. https://doi.org/10.1016/j.compositesb.2013.12.002
  7. Bazant, Z. and Kaplan, M. (1996), Concrete at High Temperatures: Material Properties and Mechanical Models, Longman Group Limited, England.
  8. Bisby, L.A. and Kodur, V.K.R. (2007), "Evaluating the fire endurance of concrete slabs reinforced with FRP bars: Considerations for a holistic approach", Compos. Part B: Eng., Infrastr. Compos. Extrem. Load., 38(5-6), 547-558. https://doi.org/10.1016/j.compositesb.2006.07.013
  9. C09 Committee (2013a), Specification for Concrete Aggregates, ASTM International.
  10. C09 Committee (2013b), Practice for Making and Curing Concrete Test Specimens in the Laboratory, ASTM International.
  11. El-Sayed, A.K., El-Salakawy, E.F. and Benmokrane, B. (2006), "Shear strength of FRP-reinforced concrete beams without transverse reinforcement", ACI Struct. J., 103(2), 235-243.
  12. Kara, I.F., Ashour, A.F. and Dundar, C. (2013), "Deflection of concrete structures reinforced with FRP bars", Compos. Part B: Eng., 44(1), 375-384. https://doi.org/10.1016/j.compositesb.2012.04.061
  13. Katz, A., Berman, N. and Bank, L.C. (1999), "Effect of high temperature on bond strength of FRP rebars", J. Compos. Constr., 3(2), 73-81. https://doi.org/10.1061/(ASCE)1090-0268(1999)3:2(73)
  14. Kodur, V. and Bisby, L. (2005), "Evaluation of fire endurance of concrete slabs reinforced with fiberreinforced polymer bars", J. Struct. Eng., 131(1), 34-43. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:1(34)
  15. Lin, X. and Zhang, Y.X. (2013), "Nonlinear finite element analyses of steel/FRP-reinforced concrete beams in fire conditions", Compos. Struct., 97, 277-285. https://doi.org/10.1016/j.compstruct.2012.09.042
  16. Mari, A.R., Oller, E., Bairan, J.M. and Duarte, N. (2013), "Simplified method for the calculation of longterm deflections in FRP-strengthened reinforced concrete beams", Compos. Part B: Eng., 45(1), 1368-1376. https://doi.org/10.1016/j.compositesb.2012.07.003
  17. Nigro, E., Cefarelli, G., Bilotta, A., Manfredi, G. and Cosenza, E. (2011), "Fire resistance of concrete slabs reinforced with FRP bars. Part II: Experimental results and numerical simulations on the thermal field", Compos. Part B: Eng., 42(6), 1751-1763. https://doi.org/10.1016/j.compositesb.2011.02.026
  18. Ospina, C.E. and Bakis, C.E. (2006), "Indirect crack control procedure for FRP-reinforced concrete beams and one-way slabs", Third International Conference on FRP Composites in Civil Engineering.
  19. Rafi, M.M. and Nadjai, A. (2011), "Fire tests of hybrid and carbon fiber-reinforced polymer bar reinforced concrete beams", ACI Mater. J., 108(3), 252-260.
  20. Rafi, M., Nadjai, A., Ali, F. and O'Hare, P. (2011), "Evaluation of thermal resistance of FRP reinforced concrete beams in fire", J. Struct. Fire Eng., 2(2), 91-107. https://doi.org/10.1260/2040-2317.2.2.91
  21. Saafi, M. (2002), "Effect of fire on FRP reinforced concrete members", Compos. Struct., 58(1), 11-20. https://doi.org/10.1016/S0263-8223(02)00045-4
  22. Sadek, A.W., El-Hawary, M.M. and El-Deeb, A.S. (2005), "Fire resistance testing of concrete beams reinforced by GFRP rebars", J. Appl. Fire Sci., 14(2), 91-104. https://doi.org/10.2190/J765-W878-2R01-4513
  23. Theriault, M. and Benmokrane, B. (1998), "Effects of FRP reinforcement ratio and concrete strength on flexural behavior of concrete beams", J. Compos. Constr., 2(1), 7-16. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:1(7)
  24. Wang, H. and Belarbi, A. (2005), "Flexural behavior of fiber-reinforced-concrete beams reinforced with FRP rebars", ACI Special Publication, 230, 895-914.
  25. Yang, J.M., Min, K.H., Shin, H.O. and Yoon, Y.S. (2012), "Effect of steel and synthetic fibers on flexural behavior of high-strength concrete beams reinforced with FRP bars", Compos. Part B: Eng., 43(3), 1077-1086. https://doi.org/10.1016/j.compositesb.2012.01.044
  26. Yu, B. and Kodur, V.K.R. (2013), "Factors governing the fire response of concrete beams reinforced with FRP rebars", Compos. Struct., 100, 257-269. https://doi.org/10.1016/j.compstruct.2012.12.028

피인용 문헌

  1. Evaluation of post-heating flexural behavior of steel fiber-reinforced high-strength concrete beams reinforced with FRP bars: Experimental and analytical results vol.225, pp.None, 2015, https://doi.org/10.1016/j.engstruct.2020.111292