Steel and Composite Structures

  • 제26권3호
  • /
  • Pages.347-360
  • /
  • 2018
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

The effects of different FRP/concrete bond-slip laws on the 3D nonlinear FE modeling of retrofitted RC beams - A sensitivity analysis

  • Lezgy-Nazargah, M. (Department of Civil Engineering, Hakim Sabzevari University) ;
  • Dezhangah, M. (Department of Civil Engineering, Hakim Sabzevari University) ;
  • Sepehrinia, M. (Department of Civil Engineering, Hakim Sabzevari University)
  • 투고 : 2017.01.16
  • 심사 : 2017.11.11
  • 발행 : 2018.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

The aim of this paper is to evaluate the accuracy and reliability of the available bond-slip laws which are being used for the numerical modeling of Fiber Reinforced Polymer (FRP)/concrete interfaces. For this purpose, a set of Reinforced Concrete (RC) beams retrofitted with external FRP were modeled using the 3D nonlinear Finite Element (FE) approach. All considered RC beams have been previously tested and the corresponding experimental data are available in the literature. The failure modes of these beams are concrete crushing, steel yielding and FRP debonding. Through comparison of the numerical and experimental results, the effectiveness of each FRP/concrete bond-slip model for the prediction of the structural behavior of externally retrofitted RC beams is assessed. The sensitivity of the numerical results against different modeling considerations of the concrete constitutive behavior and bond-slip laws has also been evaluated. The results show that the maximum allowable stress of FRP/concrete interface has an important role in the accurate prediction of the FRP debonding failure.

키워드

참고문헌

  1. Hibbitt, Karlsson and Sorensen, Inc. (2000) ABAQUS theory manual, user manual and example manual; Version 6.7, Providence, RI, USA.
  2. Abdel Baky, H., Ebead, U.A. and Neale, K.W. (2012), "Nonlinear micromechanics-based bond-slip model for FRP/concrete interfaces", Eng. Struct., 39, 11-23. https://doi.org/10.1016/j.engstruct.2012.01.010
  3. ACI 440.2R-02 (2002), Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures, American Concrete Institute; Farmington Hills, MI, USA.
  4. Arduini, M., Di Tommaso, A. and Nanni, A. (1997), "Brittle failure in FRP plate and sheet bonded beams", ACI Struct. J., 94(4), 363-370.
  5. Bencardino, F. and Condello, A. (2015), "SRG/SRP-concrete bond-slip laws for externally strengthened RC beams", Compos. Struct., 132, 804-815. https://doi.org/10.1016/j.compstruct.2015.06.068
  6. Biolzi, L., Ghittoni, C., Fedele, R. and Rosati, G. (2013), "Experimental and theoretical issues in FRP-concrete bonding", Constr. Build. Mater., 41, 182-190. https://doi.org/10.1016/j.conbuildmat.2012.11.082
  7. Bocciarelli, M. and Pisani, M.A. (2015), "Modified force method for the nonlinear analysis of FRP reinforced concrete beams", Compos. Struct., 131, 645-653. https://doi.org/10.1016/j.compstruct.2015.05.075
  8. Chen, W.F. (1982), Plasticity in Reinforced Concrete, XV, McGraw-Hill, New York, NY, USA.
  9. Chen, G.M., Chen, J.F. and Teng, J.G. (2012), "On the finite element modelling of RC beams shear-strengthened with FRP", Constr. Build. Mater., 32, 13-26. https://doi.org/10.1016/j.conbuildmat.2010.11.101
  10. Chen, G.M., Chen, J.F. and Teng, J.G. (2012), "Behaviour of FRP-to-concrete interfaces between two adjacent cracks: A numerical investigation on the effect of bondline damage", Constr. Build. Mater., 28(1), 584-591. https://doi.org/10.1016/j.conbuildmat.2011.08.074
  11. CNR-DT 200 R1/2013 (2013), Guide for the design and construction of externally bonded FRP systems for strengthening existing structures - materials, RC and PC structures, masonry structures; Italian National Research Council, Rome, Italy.
  12. Coronado, C.A. and Lopez, M.M. (2006), "Sensitivity analysis of reinforced concrete beams strengthened with FRP laminates", Cem. Concrete Compos., 28(1), 102-114. https://doi.org/10.1016/j.cemconcomp.2005.07.005
  13. Colombi, P., Fava, G. and Poggi, C. (2014), "End debonding of CFRP wraps and strips for the strengthening of concrete structures", Compos. Struct., 111, 510-521. https://doi.org/10.1016/j.compstruct.2014.01.029
  14. Hognestad, E. (1951), "A study of combined bending and axial load in reinforced concrete members", Bulletin series No. 399, Engineering Experiment Station, 49(22).
  15. Kupfer, H., Hilsdorf, H.K. and Rusch, H. (1969), "Behavior of concrete under biaxial stresses", ACI Mater. J., 66(8), 656-666.
  16. Lee, J. and Fenves, G.L. (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)
  17. Lezgy-Nazargah, M. (2017), "Assessment of refined high-order global-local theory for progressive failure analysis of laminated composite beams", Acta Mech., 228(5) 1923-1940 https://doi.org/10.1007/s00707-017-1807-6
  18. Lu, X.Z., Teng, J.G., Yea, L.P. and Jiang, J.J. (2005), "Bond-slip models for FRP sheets/plates bonded to concrete", Eng. Struct., 27(6), 920-937. https://doi.org/10.1016/j.engstruct.2005.01.014
  19. Lubliner, J., Oliver, J., Oller, S. and Onate, E. (1988), "A plastic-damage model for concrete", Int. J. Solids Struct., 25(3), 299-326. https://doi.org/10.1016/0020-7683(89)90050-4
  20. Mazzotti, C., Savoia, M. and Ferracuti, B. (2008), "An experimental study on delamination of FRP plates bonded to concrete", Constr. Build. Mater., 22(7), 1409-1421. https://doi.org/10.1016/j.conbuildmat.2007.04.009
  21. Monti, M., Renzelli, M. and Luciani, P. (2003), "FRP adhesion in uncracked and cracked concrete zones", Proceedings of the 6th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures, (KH Tan Editor), National University of Singapore, Singapore, July, pp. 183-192.
  22. Nakaba, K., Toshiyuki, K., Tomoki, F. and Hiroyuki, Y. (2001), "Bond behavior between fiber-reinforced polymer laminates and concrete", ACI Struct. J., 98(3), 359-367.
  23. Neubauer, U. and Rostasy, F.S. (1999), "Bond failure of concrete fiber reinforced polymer plates at inclined cracks-experiments and fracture mechanics model", Proceedings of the 4th International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188, Baltimore, MD, USA, November, pp. 369-382.
  24. Obaidat, Y.T., Heyden, S. and Dahlblom, O. (2010), "The effect of CFRP and CFRP/concrete interface models when modelling retrofitted RC beams with FEM", Compos. Struct., 92(6), 1391-1398. https://doi.org/10.1016/j.compstruct.2009.11.008
  25. Obaidat, Y.T., Heyden, S. and Dahlblom, O. (2013), "Evaluation of parameters of bond action between FRP and concrete", J. Compos. Constr., 17(5), 626-635. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000378
  26. Panjehpour, M., Abang Ali, A.A. and Nora Aznieta, F. (2014), "Energy absorption of reinforced concrete deep beams strengthened with CFRP sheet", Steel Compos. Struct., Int. J., 16(5), 481-489. https://doi.org/10.12989/scs.2014.16.5.481
  27. Qeshta, I.M.I., Shafigh, P. and Jumaat, M.Z. (2015), "Flexural behaviour of RC beams strengthened with wire mesh-epoxy composite", Constr. Build. Mater., 79, 104-114. https://doi.org/10.1016/j.conbuildmat.2015.01.013
  28. Rahimi, H. and Hutchinson, A. (2001), "Concrete beams strengthened with externally bonded FRP plates", J. Compos. Constr., 5(1), 44-56. https://doi.org/10.1061/(ASCE)1090-0268(2001)5:1(44)
  29. Uriayer, F.A. and Alam, M. (2015), "Steel-CFRP composite and their shear response as vertical stirrup in beams", Steel Compos. Struct., Int. J., 18(5), 1145-1160. https://doi.org/10.12989/scs.2015.18.5.1145
  30. Wang, Y.C. and Chen, C.H. (2003), "Analytical study on reinforced concrete beams strengthened for flexure and shear with composite plates", Compos. Struct., 59(1), 137-148. https://doi.org/10.1016/S0263-8223(02)00171-X
  31. Wang, Q. and Shao, Y. (2014), "Compressive performances of concrete filled Square CFRP-Steel Tubes (S-CFRP-CFST)", Steel Compos. Struct., Int. J., 16(5), 455-480. https://doi.org/10.12989/scs.2014.16.5.455
  32. Wong, R.S.Y. and Vecchio, F.J. (2003), "Towards modeling of reinforced concrete members with externally bonded fiber-reinforced polymer composites", ACI Struct. J., 100(1), 47-55.
  33. Zhou, C., Lu, X., Li, H. and Tian, T. (2014), "Restoring force model for circular RC columns strengthened by pre-stressed CFRP strips", Steel Compos. Struct., Int. J., 17(4), 371-386. https://doi.org/10.12989/scs.2014.17.4.371
  34. Ziraba, Y.N. and Baluch, M.H. (1995), "Computational model for reinforced concrete beams strengthened by epoxy bonded steel plates", Finite Elem. Anal. Des., 20(4), 253-271. https://doi.org/10.1016/0168-874X(95)00032-O