Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Flexural behavior of concrete beams reinforced with aramid fiber reinforced polymer (AFRP) bars

  • Kim, Min Sook (Department of Architectural Engineering, Kyung Hee University) ;
  • Lee, Young Hak (Department of Architectural Engineering, Kyung Hee University) ;
  • Kim, Heecheul (Department of Architectural Engineering, Kyung Hee University) ;
  • Scanlon, Andrew (Department of Civil Engineering, The Pennsylvania State University) ;
  • Lee, Junbok (Department of Architectural Engineering, Kyung Hee University)
  • Received : 2010.04.28
  • Accepted : 2011.02.22
  • Published : 2011.05.25
⟨ Previous Next ⟩

Abstract

Due to the low elastic modulus of FRP, concrete members reinforced with FRP rebars show greater deflections than members reinforced with steel rebars. Deflection is one of the important factors to consider the serviceability of horizontal members. In this study flexural test of AFRP reinforced concrete beams was performed considering reinforcement ratio and compressive strength as parameters. The test results indicated that flexural capacity and stiffness increase in proportion to the reinforcement ratio. The test results were compared with existing proposed equations for the effective moment of inertia including ACI 440. The most of the proposed equations were found to over-estimate the effective moment of inertia while the equation proposed by Bischoff and Scanlon (2007) most accurately predicted the values obtained through actual testing.

Keywords

Acknowledgement

Supported by : Kyung Hee University

References

  1. ACI Committee 318 (2005), Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (318R-05), American Concrete Institute, Farmington Hills, Mich.
  2. ACI Committee 440 (2006), Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1R-06), American Concrete Institute, Farmington Hills, Mich.
  3. ACI Committee 435 (1995), Control of Deflection in Concrete Structures (ACI 435R-95), American Concrete Institute, Farmington Hills, Mich.
  4. Benmokrane, B., Chaallal, O. and Masmoudi, R. (1996), "Flexural response of concrete beams reinforced with FRP reinforcing bars", ACI Mater. J., 91(2), 46-55.
  5. Bischoff, P.H. (2007), "Deflection calculation of FRP reinforced concrete beams based on modifications to the existing Branson equation", J. Compos. Constr., 11(1), 4-14. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:1(4)
  6. Bischoff, P.H. and Scanlon, A. (2007), "Effective moment of inertia for calculating deflections of concrete members containing steel reinforcement and fiber-reinforced polymer reinforcement", ACI Struct. J., 104(1), 68-75.
  7. Branson, D.E. (1965), Instantaneous and Time-dependent Deflections of Simple and Continuous Reinforced Concrete Beams, Alabama Highway Research Report, Report No. 7, Part 1.
  8. Lu, W.Y., Hwang, S.J. and Lin, I.J. (2010), "Deflection prediction for reinforced concrete deep beams", Comput. Concrete, 7(1), 1-16. https://doi.org/10.12989/cac.2010.7.1.001
  9. Nayal, R. and Rasheed, H.A. (2006), "Tension stiffening model for concrete beams reinforced with steel and FRP bars", J. Mater. Civil Eng., 18(6), 831-841. https://doi.org/10.1061/(ASCE)0899-1561(2006)18:6(831)
  10. Rafi, M.M., Nadjai, A., Ali, F. and Talamona, D. (2008), "Aspects of behavior of CFRP reinforced concrete beams in bending", Constr. Buil. Mater., 22, 277-285. https://doi.org/10.1016/j.conbuildmat.2006.08.014
  11. Sarkar, P., Govind, M. and Menon, D. (2009), "Estimation of short-term deflection in two-way RC slab", Struct. Eng. Mech., 31(2), 237-240. https://doi.org/10.12989/sem.2009.31.2.237
  12. Scanlon, A. and Bischoff, P.H. (2008), "Shrinkage restraint and loading history effects of deflections of flexural members", ACI Struct. J., 105(4), 498-506.
  13. Toutanji, H.A. and Saafi, M. (2000), "Flexural behavior of concrete beams reinforced with glass fiber-reinforced polymer (GFRP) bars", ACI Struct. J., 97(5), 712-719.
  14. Yost, J.R., Gross, S.P. and Dinehart, D.W. (2003), "Effective moment of inertia for glass fiber-reinforced polymer-reinforced concrete beams", ACI Struct. J., 100(6), 732-739.
  15. Zanuy, C. (2010), "Investigating the negative tension stiffening effect of reinforced concrete", Struct. Eng. Mech., 34(2), 189-211. https://doi.org/10.12989/sem.2010.34.2.189

Cited by

  1. Experimental determination of tensile strength and KIcof polymer concretes using semi-circular bend (SCB) specimens vol.43, pp.6, 2012, https://doi.org/10.12989/sem.2012.43.6.823
  2. Experiment and Numerical Simulation on Non-Magnetic Prestressed Beam vol.894, 2017, https://doi.org/10.4028/www.scientific.net/MSF.894.1
  3. The role of mix design and short glass fiber content on mode-I cracking characteristics of polymer concrete vol.317, pp.None, 2022, https://doi.org/10.1016/j.conbuildmat.2021.126139