Steel and Composite Structures

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Experimental study on hollow steel-reinforced concrete-filled GFRP tubular members under axial compression

  • Chen, B.L. (College of Resources and Civil Engineering, Northeastern University) ;
  • Wang, L.G. (College of Resources and Civil Engineering, Northeastern University)
  • Received : 2018.06.02
  • Accepted : 2019.05.31
  • Published : 2019.07.10
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Abstract

Hollow steel-reinforced concrete-filled GFRP tubular member is a new kind of composite members. Firstly set the mold in the GFRP tube (non-bearing component), then set the longitudinal reinforcements with stirrups (steel reinforcement cage) between the GFRP tube and the mold, and filled the concrete between them. Through the axial compression test of the hollow steel-reinforced concrete-filled GFRP tubular member, the working mechanism and failure modes of composite members were obtained. Based on the experiment, when the load reached the ranges of $55-70%P_u$ ($P_u-ultimate$ load), white cracks appeared on the surface of the GFRP tubes of specimens. At that time, the confinement effects of the GFRP tubes on core concrete were obvious. Keep loading, the ranges of white cracks were expanding, and the confinement effects increased proportionally. In addition, the damages of specimens, which were accompanied with great noise, were marked by fiber breaking and resin cracking on the surface of GFRP tubes, also accompanied with concrete crushing. The bearing capacity of the axially compressed components increased with the increase of reinforcement ratio, and decreased with the increase of hollow ratio. When the reinforcement ratio was increased from 0 to 4.30%, the bearing capacity was increased by about 23%. When the diameter of hollow part was decreased from 55mm to 0, the bearing capacity was increased by about 32%.

Keywords

Acknowledgement

Supported by : China Scholarship Council

References

  1. Abdelkarim, O. and ElGawady, M. (2015), "Concrete-filled-large deformable FRP tubular columns under axial compressive loading", Fibers, 3(4), 432-449. https://doi.org/10.3390/fib3040432
  2. Abdelkarim, O.I. and ElGawady, M.A. (2016), "Behavior of hollow FRP-concrete-steel columns under static cyclic axial compressive loading", Eng. Struct., 123, 77-88. https://doi.org/10.1016/j.engstruct.2016.05.031
  3. Aire, C., Gettu, R., Casas, J.R., Marques, S. and Marques, D. (2010), "Concrete laterally confined with fiber-reinforced polymers (FRP): experimental study and theoretical model", Mater. Constr., 60(297), 19-31. https://doi.org/10.3989/mc.2010.45608
  4. Cascardi, A., Micelli, F. and Aiello, M.A. (2016), "Unified model for hollow columns externally confined by FRP", Eng. Struct., 1(111), 119-130. https://doi.org/10.1016/j.engstruct.2015.12.032
  5. Chellapandian, M., Prakash, S.S. and Sharma, A. (2017), "Strength and ductility of innovative hybrid NSM reinforced and FRP confined short RC columns under axial compression", Compos. Struct., 176, 205-216. https://doi.org/10.1016/j.compstruct.2017.05.033
  6. Chen, B.L. and Wang, L.G. (2015), "Experimental study on flexural behavior of splicing concrete-filled GFRP tubular composite members connected with steel bars", Steel Compos. Struct., Int. J., 18(5), 1129-1144. https://doi.org/10.12989/scs.2015.18.5.1129
  7. Doran, B., Koksal, H.O. and Turgay, T. (2009), "Nonlinear finite element modeling of rectangular/square concrete columns confined with FRP", Mater. Des., 30(8), 3066-3075. https://doi.org/10.1016/j.matdes.2008.12.007
  8. Eid, R. and Paultre, P. (2017), "Compressive behavior of FRP-confined reinforced concrete columns", Eng. Struct., 132, 518-530. https://doi.org/10.1016/j.engstruct.2016.11.052
  9. Fam, A.Z. (2000), "Concrete-filled fiber-reinforced polymer tubes for axial and flexural structural members", A dissertation submitted to the faculty of graduate studies in partial fulfillment of the requirements for the Degree of Doctor of Philosophy, National Library of Canada.
  10. Hadigheh, S.A., Gravina, R.J. and Smith, S.T. (2017), "Effect of acid attack on FRP-to-concrete bonded interfaces", Constr. Build. Mater., 152, 285-303. https://doi.org/10.1016/j.conbuildmat.2017.06.140
  11. Huang, L.N., Zhang, D.X. and Wang, R.G. (2002), "Research on the stress-strain relation of the GFRP-confined concrete column under the axial compression", J. Wuhan Univ. Technol., 24(7), 31-34. https://doi.org/10.3321/j.issn:1671-4431.2002.07.010
  12. Liu, J., Liu, Q.Y. and An, L. (2007), "Experimentation of GFRPconcrete circular tube columns", J. Changchun Inst. Technol. (Natural Science), 8(1), 11-13. https://doi.org/10.3969/j.issn.1009-8984.2007.01.004
  13. Lu, G.C. (2005), "Study on behavior of concrete-filled FRP tubes under axial compression", Ph.D. Dissertation; Tsinghua University, Beijing, China.
  14. Mirmiran, A. and Shahawy, M. (1997), "Behavior of concrete columns confined by fiber composites", J. Struct. Eng., 123(5), 583-590. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:5(583)
  15. Nanni, A. and Bradford, N.M. (1995), "FRP jacketed concrete under uniaxial compression", Constr. Build. Mater., 9(2), 15-124. https://doi.org/10.1016/0950-0618(95)00004-Y
  16. Realfonso, R. and Napoli, A. (2013), "Confining concrete members with FRP systems: predictive vs design models", Compos. Struct., 104(5), 304-319. https://doi.org/10.1016/j.compstruct.2013.04.031
  17. Setvati, M.R. and Mustaffa, Z. (2018), "Rehabilitation of notched circular hollow sectional steel beam using CFRP patch", Steel Compos. Struct., Int. J., 26(2), 151-161. https://doi.org/10.12989/scs.2018.26.2.151
  18. Teng, J.G., Yu, T., Wong, Y.L., Dong, S.L. and Yang, Y.F. (2006), "Behavior of hybrid FRP-concrete-steel tubular columns: experimental and theoretical studies", Progress Steel Build. Struct., 10(5), 443-452.
  19. Wang, L.G., Han, H.F. and Liu, P. (2016), "Behavior of reinforced concrete-filled GFRP tubes under eccentric compression loading", Mater. Struct., 7(9), 2819-2827. https://doi.org/10.1617/s11527-015-0688-1
  20. Wong, Y.L., Yu, T., Teng, J.G. and Dong, S.L. (2008), "Behaviour of FRP confined concrete in annular section columns", Composites (Part B), 39, 451-466. https://doi.org/10.1016/j.compositesb.2007.04.001
  21. Yang, Y., Xue, Y., Yu, Y., Liu, R. and Ke, S. (2017), "Study of the design and mechanical performance of a GFRP-concrete composite deck", Steel Compos. Struct., Int. J., 24(6), 679-688. https://doi.org/10.12989/scs.2017.24.6.679
  22. Yu, T. and Teng, J.G. (2013), "Behavior of hybrid FRP-concretesteel double-skin tubular columns with a square outer tube and a circular inner tube subjected to axial compression", J. Compos. Constr., 17(2), 271-279. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000331
  23. Yu, Q., Han, L.H. and Zhang, Z. (2003), "Long-term effect in FRP-confined concrete stub columns under sustained loading", China J. Highway Transport, 16(3), 58-63. https://doi.org/10.3321/j.issn:1001-7372.2003.03.014
  24. Zhang, N. and Wang, L.G. (2014), "Nonlinear analysis of flexural members of GFRP-concrete-steel double-skin tubular", Steel Constr., 29(12), 8-12. https://doi.org/10.13206/j.gjg201412002