Structural Engineering and Mechanics

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Numerical simulation of concrete beams reinforced with composite GFRP-Steel bars under three points bending

  • Elamary, Ahmed S. (Faculty of Engineering, Department of Civil Engineer, Al-Azhar University) ;
  • Abd-ELwahab, Rafik K. (Faculty of Engineering, Department of Civil Engineer, Al-Azhar University)
  • Received : 2015.04.15
  • Accepted : 2016.01.29
  • Published : 2016.03.10
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Abstract

Fiber reinforced polymer (FRP) applications in the structural engineering field include concrete-FRP composite systems, where FRP components are either attached to or embedded into concrete structures to improve their structural performance. This paper presents the results of an analytical study conducted using finite element model (FEM) to simulate the behavior of three-points load beam reinforced with GFRP and/or steel bars. To calibrate the FEM, a small-scale experimental program was carried out using six reinforced concrete beams with $200{\times}200mm$ cross section and 1000 mm length cast and tested under three point bending load. The six beams were divided into three groups, each group contained two beams. The first group was a reference beams which was cast without any reinforcement, the second group concrete beams was reinforced using GFRP, and the third group concrete beams was reinforced with steel bars. Nonlinear finite element simulations were executed using ANSYS software package. The difference between the theoretical and experimental results of beams vertical deflection and beams crack shapes were within acceptable degree of accuracy. Parametric study using the calibrated model was carried out to evaluate two parameters (1) effect of number and position of longitudinal main bars on beam behavior; (2) performance of concrete beam with composite longitudinal reinforcement steel and GFRP bars.

Keywords

References

  1. Arduini, M. and Nanni, A. (1997), "Parametric study of beams with externally bonded FRP reinforcement", ACI Struct. J., 94(5), 493-501.
  2. Huang, J. and Aboutaha, R. (2010), "Environmental reduction factors for GFRP bars used as concrete reinforcement: new scientific approach", J. Compos. Constr., 14(5), 479-486. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000122
  3. Karbhari, V.M. (2001), "Material considerations in FRP rehabilitation of concrete structures", J. Mater. Civil Eng., 13(2), 90-7. https://doi.org/10.1061/(ASCE)0899-1561(2001)13:2(90)
  4. Malek, A.M., Saadatmanesh, H. and Ehasani, M. (1998), "Prediction of failure load of R/C beams strengthened with FRP plate due to stress concentration at the plate end", ACI Struct. J., 95(1), 142-52.
  5. Mini, K.M., Alapatt, R.J., David, A.E., Radhakrishnan, A., Cyriac, M.M. and Ramakrishnan, R. (2014) "Experimental study on strengthening of R.C beam using glass fibre reinforced composite", Struct. Eng. Mech., 50(3), 275-286. https://doi.org/10.12989/sem.2014.50.3.275
  6. Panda, K.C., Bhattacharyya, S.K. and Barai, S.V. (2013), "Shear strengthening effect by bonded GFRP strips and transverse steel on RC T-beams", Struct. Eng. Mech., 47(1), 75-98. https://doi.org/10.12989/sem.2013.47.1.075
  7. Qu, W., Zhang, X. and Huang, H. (2009), "Flexural Behavior of Concrete Beams Reinforced with Hybrid (GFRP and Steel) Bars", J. Compos. Constr., 13(5), 350-359. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000035
  8. Saadatmanesh, H. (1994), "Fiber composites for new and existing structures", ACI Struct. J., 91(3), 346-54.
  9. Saadatmanesh, H. and Malek, A.M. (1998), "Design guidelines for flexural strengthening of RC beams with FRP plates", J. Compos. Constr., ASCE, 2(4), 158-64. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:4(158)
  10. Tastani, S. and Pantazopoulou, S. (2006), "Bond of GFRP Bars in Concrete: Experimental Study and Analytical Interpretation", J. Compos. Constr., 10(5), 381-391. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:5(381)
  11. Teng, J.G., Caob, S.Y. and Lama, L. (2001), "Behaviour of GFRP-strengthened RC cantilever slabs", Constr. Build. Mater., 15(1), 339-49. https://doi.org/10.1016/S0950-0618(01)00016-2
  12. Teng, J.G., Fernando, D., Yu, T. and Zhao, X.L. (2010), "Treatment of steel surfaces for effective adhesive bonding", Proceedings of the 5th International Conference on FRP composites in Civil Engineering (CICE), China, Beijing.
  13. Thomas, J. and Ramadass, S. (2015), "Design for shear strength of concrete beams longitudinally reinforced with GFRP bars", Struct. Eng. Mech., 53(1), 41-55. https://doi.org/10.12989/sem.2015.53.1.041
  14. Wang, Y.C. and Chen, C.H. (2003), "Analytical study on reinforced concrete beams strengthened for flexure and shear with composite plates", J. Compos. Struct., 59(1), 137-148. https://doi.org/10.1016/S0263-8223(02)00171-X
  15. Zhao, X.L. and Zhang, L. (2007), "State-of-the-art review on FRP strengthened steel structures", Eng. Struct., 29(8), 1808-23. https://doi.org/10.1016/j.engstruct.2006.10.006

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