International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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Glass FRP-Bonded RC Beams under Cyclic Loading

  • Published : 2007.12.30
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Abstract

Ten beams bonded with glass fiber reinforced polymer (GFRP) laminates were tested under cyclic loading with the load range and the FRP reinforcement ratio as test parameters. The maximum load level during cyclic loading was 55%, 65% and 75% of the static flexural strength while the minimum load level was kept constant at 35%. Deflections of the beams at the end of 525000 cycles were found to increase by 16% and 44% when the maximum load level was increased from 55% to 65% and 75% of the static flexural strength, respectively. Beams with FRP reinforcement ratios of 0.64% and 1.28% were found to exhibit lesser deflections of about 15% and 20%, respectively, compared to a similar beam without FRP reinforcement. An analytical approach based on cycle-dependent effective moduli of elasticity of concrete and FRP reinforcement is presented and found to predict the deflections of the test beams well.

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References

  1. Heffernan, P. J. and Erki, M. A., "Fatigue Behavior of Reinforced Concrete Beams Strengthened with Carbon Fiber Reinforced Plastic Laminates," Journal of Composites for Construction, Vol.8, No.2, 2004, pp.132-140 https://doi.org/10.1061/(ASCE)1090-0268(2004)8:2(132)
  2. Shahawy, M. and Beitelman, T., "Static and Fatigue Performance of RC Beams Strengthened with CFRP Laminates," Journal of Structural Engineering, Vol.125, No.6, 1999, pp.613-621 https://doi.org/10.1061/(ASCE)0733-9445(1999)125:6(613)
  3. Brena, S. F., Benouaich, M. A., Kreger, M. E., and Wood, S. L., "Fatigue Tests of Reinforced Concrete Beams Strengthened Using Carbon Fiber-Reinforced Polymer Composites," ACI Structural Journal, Vol.102, No.2, 2005, pp.305-313
  4. Wu, Z. Y., Clement, J. L, Tailhan, J. L., Boulay, C., and Fakhri, P., "Static and Fatigue Tests on Precracked RC Beams Strengthened with CFRP Sheets," 6th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-6), Singapore, 2003, pp.913-922
  5. Balaguru, P. and Shah, S. P., "A Method of Predicting Crack Widths and Deflections for Fatigue Loading," ACI Special Publication, SP 75-7, 1982, pp.153-176
  6. Whaley, C. P. and Neville, A. M., "Non-Elastic Deformation of Concrete under Cyclic Compression," Magazine of Concrete Research, Vol.25, No.84, 1973, pp.145-154 https://doi.org/10.1680/macr.1973.25.84.145
  7. Ogin, S. L., Smith, P. A., and Beaumont, P. W. R., "A Stress Intensity Factor Approach to the Fatigue Growth of Transverse Ply Cracks," Composites Science and Technology, Vol.24, 1985, pp.47-59 https://doi.org/10.1016/0266-3538(85)90060-0
  8. Deskovic, N., Meier, U., and Triantafillou, T. C., "Innovative Design of FRP Combined with Concrete: Long-Term Behavior," Journal of Structural Engineering, Vol.121, No.7, 1995, pp.1079-1089 https://doi.org/10.1061/(ASCE)0733-9445(1995)121:7(1079)
  9. Branson, D. E., Deformation of Concrete Structures, McGraw-Hill, New York, 1977