Structural Engineering and Mechanics

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Modeling shear behavior of reinforced concrete beams strengthened with externally bonded CFRP sheets

  • Khan, Umais (Civil and Environmental Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM)) ;
  • Al-Osta, Mohammed A. (Civil and Environmental Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM)) ;
  • Ibrahim, A. (Department of Civil Engineering, University of Idaho)
  • Received : 2016.04.06
  • Accepted : 2016.09.25
  • Published : 2017.01.10
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Abstract

Extensive research work has been performed on shear strengthening of reinforced concrete (RC) beams retrofitted with externally bonded carbon fiber reinforced polymer (CFRP) in form of strips. However, most of this research work is experimental and very scarce studies are available on numerical modelling of such beams due to truly challenging nature of modelling concrete shear cracking and interfacial interaction between components of such beams. This paper presents an appropriate model for RC beam and to simulate its cracking without numerical computational difficulties, convergence and solution degradation problems. Modelling of steel and CFRP and their interfacial interaction with concrete are discussed. Finally, commercially available non-linear finite element software ABAQUS is used to validate the developed finite element model with key tests performed on full scale T-beams with and without CFRP retrofitting, taken from previous extensive research work. The modelling parameters for bonding behavior of CFRP with special anchors are also proposed. The results presented in this research work illustrate that appropriate modelling of bond behavior of all the three types of interfaces is important in order to correctly simulate the shear behavior of RC beams strengthened with CFRP.

Keywords

Acknowledgement

Supported by : KFUPM

References

  1. ACI committee 318 (2014), 318-14: Building Code Requirements for Structural Concrete and Commentary.
  2. ACI Committee 440 (2008), 440.2R-08 Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures.
  3. ACI Committee 446 (1997), Finite Element Analysis of Fracture in Concrete Structures, State-of-the-Art (No. ACI 446.3R-97).
  4. Bansal, P.P., Sharma, R. and Mehta, A. (2016), "Retrofitting of RC girders using pre-stressed CFRP sheets", Steel Compos. Struct., 20(4), 833-849. https://doi.org/10.12989/scs.2016.20.4.833
  5. Birtel, V. and Mark, P. (2006), "Parameterised finite element modelling of RC beam shear failure", 2006 ABAQUS Users' Conference, 95-108.
  6. Bocciarelli, M., Gambarelli, S., Nistico, N., Pisani, MA. and Poggi, C. (2014), "Shear failure of RC elements strengthened with steel profiles and CFRP wraps", Compos. Part B: Eng., 67, 9-21. https://doi.org/10.1016/j.compositesb.2014.06.009
  7. Chen, G.M. (2010), "Behaviour and strength of RC beams shearstrengthened with externally bonded FRP reinforcement", Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
  8. De Borst, R., Remmers, J.J.C., Needleman, A. and Abellan, M.A. (2004), "Discrete vs. smeared crack models for concrete fracture", Int. J. Numer. Anal. Meth. Geomech., 28(7-8), 583-607. https://doi.org/10.1002/nag.374
  9. Gambarelli, S., Nistico, N. and Ozboltb, J. (2014), "Numerical analysis of compressed concrete columns confined with CFRP: Microplane-based approach", Compos. Part B: Eng., 67, 303-312. https://doi.org/10.1016/j.compositesb.2014.06.026
  10. Kim, Y., Quinn, K., Satrom, N., Garcia, J., Sun, W., Ghannoum, WM. and Jirsa. J.O. (2011), "Shear strengthening of reinforced and prestressed concrete beams using carbon fiber reinforced polymer (CFRP) sheets and anchors", Technical Report No. FHWA/TX-12/0-6306-1, Center for Transportation Research The University of Texas at Austin 1616 Guadalupe Street, Suite 4.202 Austin, TX 78701.
  11. Lee, J. and Fenves, G. (1998), "Plastic-damage model for cyclic loading of concrete structures", J. Eng. Mech., 124(8), 892-900. https://doi.org/10.1061/(ASCE)0733-9399(1998)124:8(892)
  12. Lima, M., Doh, J., Hadi, M.H. and Miller, D. (2016), "The effects of CFRP orientation on the strengthening of reinforced concrete structures", Struct. Des. Tall Spec. Build., 25(15), 759-784. https://doi.org/10.1002/tal.1282
  13. Lubliner, J., Oliver, J., Oller, S. and Onate, E. (1989), "A plasticdamage model for concrete", Int. J. Solid. Struct., 25(3), 299-326. https://doi.org/10.1016/0020-7683(89)90050-4
  14. Nistico, N., Ozboltb, J. and Polimanti, G. (2016), "Modeling of reinforced concrete beams strengthened in shear with CFRP: Microplane-based approach", Compos. Part B: Eng., 90, 351-364. https://doi.org/10.1016/j.compositesb.2016.01.009
  15. Mercan, B. (2011), "Modeling and behavior of prestressed concrete spandrel beams", Ph.D Thesis, University of Minnesota, Minneapolis and St. Paul, Minnesota.
  16. Nistico, N., Ozboltb, J. and Polimanti. G. (2016), "Modeling of reinforced concrete beams strengthened in shear with CFRP: Microplane-based approach", Compos. Part B: Eng., 90, 351-364. https://doi.org/10.1016/j.compositesb.2016.01.009
  17. Otoom, O.F.A., Smith, S.T. and Foster, S.J. (2006), "Finite element modeling of FRP shear strengthened RC beams", Proceedings of the 3rd International Conference on FRP Composites in Civil Engineering (CICE 2006), Miami, Florida, USA.
  18. Panjehpour, M., Ali, A.A.A. and Aznieta, F.N. (2014), "Energy absorption of reinforced concrete deep beams strengthened with CFRP sheet", Steel Compos. Struct., 16(5), 481-489. https://doi.org/10.12989/scs.2014.16.5.481
  19. Smith, S.T., Otoom, O. and Foster, S.J. (2006), "Finite element modelling of RC beams strengthened in shear with FRP composites", Proceedings of the 2nd International Fib Congress, Naples, Italy, June.
  20. Simulia (2013), Getting Started with Abaqus, Keyword Edition
  21. Tzoura, E. and Triantafillou, T.C. (2016), "Shear strengthening of reinforced concrete T-beams under cyclic loading with TRM or FRP jackets", Mater. Struct., 49, 17-28. https://doi.org/10.1617/s11527-014-0470-9
  22. Tsai, W.T. (1998), "Uniaxial compressional stress-strain relation of concrete", J. Struct. Eng., 114(9), 2133-2136. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:9(2133)
  23. Yang, Z.J. and Chen, J.F. (2005), "Finite element modelling of multiple cohesive discrete crack propagation in reinforced concrete beams", Eng. Fract. Mech., 72(14), 2280-97. https://doi.org/10.1016/j.engfracmech.2005.02.004
  24. Yang, Z.J. and Chen, J.F. (2004), "Fully automatic modelling of cohesive discrete crack propagation in concrete beams using local arc-length methods", Int. J. Solid. Struct., 41(3-4), 801-26. https://doi.org/10.1016/j.ijsolstr.2003.09.033
  25. Yang, Z.J., Chen, J.F. and Proverbs, D. (2003), "Finite element modelling of concrete cover separation failure in FRP plated RC beams", Constr. Build. Mater., 17(1), 3-13. https://doi.org/10.1016/S0950-0618(02)00090-9

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