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Experimental study on flexural behavior of splicing concrete-filled GFRP tubular composite members connected with steel bars

  • Chen, B.L. (College of Resources and Civil Engineering, Northeastern University) ;
  • Wang, L.G. (College of Resources and Civil Engineering, Northeastern University)
  • 투고 : 2013.05.23
  • 심사 : 2014.11.18
  • 발행 : 2015.05.25

초록

Based on the experiment, this paper focuses on studying flexural behavior of splicing concrete-filled glass fiber reinforced polymer (GFRP) tubular composite members connected with steel bars. The test results indicated the confinement effects of GFRP tubes on the concrete core in compression zone began to produce, when the load reached about $50%P_u$ ($P_u$-ultimate load), but the confinement effects in tensile zone was unobvious. In addition, the failure modes of composite members were influenced by the steel ratio of the joint. For splicing unreinforced composite members, the steel ratio more than 1.96% could satisfy the splicing requirements and the steel ratio 2.94% was ideal comparatively. For splicing reinforced specimen, the bearing capacity of specimen with 3.92% steel ratio was higher 21.4% than specimen with 2.94% steel ratio and the latter was higher 21.2% than the contrast non-splicing specimen, which indicated that the steel ratio more than 2.94% could satisfy the splicing requirements and both splicing ways used in the experiment were feasible. So, the optimal steel ratio 2.94% was suggested economically. The experimental results also indicated that the carrying capacity and ductility of splicing concrete-filled GFRP tubular composite members could be improved by setting internal longitudinal rebars.

키워드

참고문헌

  1. Bousselham, A. and Chaallal, O. (2006), "Behavior of reinforced concrete T-beams strengthened in shear with carbon fiber reinforced polymer-an experimental study", ACI Struct. J., 103 (3), 339-347.
  2. Chen, B.L., Wang, L.G. and Qin, G.P. (2010), "Experimental research on anti-bending performance of composite RC-Filled GFRP tube members", J. Northeast. Univ. (Natural Science), 31(10), 1495-1498. [In Chinese]
  3. Cho, C.G., Kwon, M. and Spacone, E. (2005), "Analytical model of concrete-filled fiber-reinforced polymer tubes based on multiaxial constitutive laws", J. Struct. Eng, 131(9), 1426-1433. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:9(1426)
  4. Cole, B. and Fam, A. (2006), "Flexural load testing of concrete-filled FRP tubes with longitudinal steel and FRP rebar", J. Compos. Construct., 10(2), 161-171. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:2(161)
  5. Davol, A., Burgueno, R. and Seible, F. (2001), "Flexural behavior of circular concrete filled FRP shell", J. Struct. Eng., 127(7), 810-817. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:7(810)
  6. Fam, A. and Rizkalla, S. (2002), "Flexural behavior of concrete-filled fiber-reinforced polymer circular tubes", J. Compos. Construct., 6(2), 123-132. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:2(123)
  7. Fujikake, K., Mindess, S. and Xu, H. (2004), "Analytical model for concrete confined with fibre reinforced polymer composite", J. Compos. Construct., 8(4), 341-351. https://doi.org/10.1061/(ASCE)1090-0268(2004)8:4(341)
  8. Helmi, K., Fam, A. and Mufti, A. (2005), "Field installation, splicing, and flexural testing of hybrid FRP/concrete piles", ACI Special Publication, Vol. SP-230-62, 1103-1120.
  9. Hoult, N.A. and Lees, J.M. (2009), "Modeling of an unbonded CFRP strap shear retrofitting system for reinforced concrete beams", J. Compos. Construct., 13(4), 292-301. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000013
  10. Hu, Y.M., Yu, T. and Teng, J.G. (2011), "FRP-confined circular concrete-filled thin steel tubes under axial compression", J. Compos. Construct., 15(5), 850-860. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000217
  11. Lam, L. and Teng, J.G. (2004), "Ultimate condition of fibre reinforced polymer-confined concrete", J. Compos. Construct., 8(6), 539-548. https://doi.org/10.1061/(ASCE)1090-0268(2004)8:6(539)
  12. Liu, L. and Lu, Y.Y. (2010), "Axial bearing capacity of short FRP confined concrete-filled steel tubular columns", J. Wuhan Univ. Technol. (Materials Srcience), 25(3), 454-458. https://doi.org/10.1007/s11595-010-0022-2
  13. Lu, G.C. (2005), "Study on behavior of concrete-filled FRP tubes under axial compression", Ph.D. Dissertation; Tsinghua University, Beijing, China. [In Chinese]
  14. Manjunatha, C.M., Taylor, A.C., Kinloch, A.J. and Sprenger, S. (2010), "The tensile fatigue behavior of a GFRP composite with rubber particle modified epoxy matrix", J. Reinf. Plast. Compos., 29(14), 2170-2183. https://doi.org/10.1177/0731684409344652
  15. Matthys, H., Toutanji, K. and Taerwe, L. (2005), "Axial load behaviour of large-scale columns confined with fibre-reinforced polymer composites", ACI Struct. J., 102(2), 258-267.
  16. Mehrdad, S.M. and Mohammad, H.R. (2009), "Experimental and analytical studies on one-way concrete slabs reinforced with GFRP molded gratings", Steel Compos. Struct., Int. J., 9(6), 569-584. https://doi.org/10.12989/scs.2009.9.6.569
  17. Mirmiran, A., Shahawy, M. and Sammaan, M. (1999), "Strength and ductility of hybrid FRP-concrete beam-columns", J. Struct. Eng., 125(10), 1085-1093. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:10(1085)
  18. Moran, D.A. and Pantelides, C.P. (2002), "Stress-strain model for fibre-reinforced polymer-confined concrete", J. Compos. Construct., 6(4), 233-240. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:4(233)
  19. Panda, K.C., Bhattacharyya, S.K. and Barai, S.V. (2012), "Shear behaviour of RC T-beams strengthened with U-wrapped GFRP sheet", Steel Compos. Struct., Int. J., 12(2), 149-166. https://doi.org/10.12989/scs.2012.12.2.149
  20. Qin, G.P. (2009), "Mechanical behaviors study on GFRP tube filled with reinforced concrete members", Ph.D. Dissertation; Northeastern University, Shenyang, China. [In Chinese]
  21. Saadatmanesh, H. and Ehsani, M.R. (1994), "Strength and ductility of concrete external reinforced with fiber composite straps", ACT Struct. J., 91(4), 434-447.
  22. Saenz, N. and Pantelides, C.P. (2007), "Strain-based confinement model for FRP-confined concrete", J. Struct. Eng., 133(6), 825-833. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:6(825)
  23. Salim, H.A., Barker, M. and Davalos, J.F. (2006), "Approximate series solution for analysis of FRP composite highway bridges", J. Compos. Construct., 10(4), 357-366. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:4(357)
  24. Shao, Y. and Mirmiran, A. (2005), "Experimental Investigation of Cycled Behavior of Concrete Fi11ed Fiber Reinforced Polymer Tubes", J. Compos. Construct., 9(3), 263-273. https://doi.org/10.1061/(ASCE)1090-0268(2005)9:3(263)
  25. Wang, B.L. and Wang, Q.X. (2009), "Research status of FRP tube filled with concrete composite structure", Ind. Construct. (supplement), 39(437), 262-265. [In Chinese]
  26. Wang, Y.F., Ma, Y.S. and Wu, H.L. (2011), "Reinforced high-strength concrete square columns confined by aramid FRP jackets. part I: Experimental study", Steel Compos. Struct., Int. J., 11(6), 455-468. https://doi.org/10.12989/scs.2011.11.6.455
  27. Xiao, Y. and Wu, H. (2003), "Retrofit of reinforced concrete columns using partially stiffened steel jackets", J. Struct. Eng., 129(6), 725-732. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:6(725)
  28. Xiong, W., Cai, C.S., Xiao, R.C. and Zhang, Y. (2012), "Design strategy of hybrid stay cable system using CFRP and steel materials", Steel Compos. Struct., Int. J., 13(1), 47-70. https://doi.org/10.12989/scs.2012.13.1.047
  29. Yu, T., Wong, Y.L., Teng, J.G., Dong, S.L. and Lam, E.S.S. (2006), "Flexural behavior of hybrid FRP-concrete- steel double skin tubular members", J. Compos. Construct., 10(5), 443-452. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:5(443)
  30. Zhu, Z.Y., Ahmad, I. and Mirmiran, A. (2006), "Splicing of precast concrete-filled FRP tubes", J. Compos. Construct., 10(4), 345-356. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:4(345)

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