Steel and Composite Structures

  • 제16권5호
  • /
  • Pages.455-480
  • /
  • 2014
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Compressive performances of concrete filled Square CFRP-Steel Tubes (S-CFRP-CFST)

  • Wang, Qingli (School of Civil Engineering, Shenyang Jianzhu University) ;
  • Shao, Yongbo (School of Civil Engineering, Yantai University)
  • 투고 : 2011.07.29
  • 심사 : 2013.12.23
  • 발행 : 2014.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Sixteen concrete filled square CFRP-steel tubular (S-CFRP-CFST) stub columns under axial compression were experimentally investigated. The experimental results showed that the failure mode of the specimens is strength loss of the materials, and the confined concrete has good plasticity due to confinement of the CFRP-steel composite tube. The steel tube and CFRP can work concurrently. The load versus longitudinal strain curves of the specimens can be divided into 3 stages, i.e., elastic stage, elasto-plastic stage and softening stage. Analysis based on finite element method showed that the longitudinal stress of the steel tube keeps almost constant along axial direction, and the transverse stress at the corner of the concrete is the maximum. The confinement effect of the outer tube to the concrete is mainly focused on the corner. The confinements along the side of the cross-section and the height of the specimen are both non-uniform. The adhesive strength has little effect both on the load versus longitudinal strain curves and on the confinement force versus longitudinal strain curves. With the increasing of the initial stress in the steel tube, the load carrying capacity, the stiffness and the peak value of the average confinement force are all reduced. Equation for calculating the load carrying capacity of the composite stub columns is presented, and the estimated results agree well with the experimental results.

키워드

참고문헌

  1. Che, Y., Wang, Q.L. and Shao, Y.B. (2012), "Compressive performances of the concrete filled circular CFRP-steel tube (C-CFRP-CFST)", Int. J. Adv. Steel Construct., 8(4), 311-338.
  2. Choi, K.K. and Xiao, Y. (2010), "Analytical model of circular CFRP confined concrete-filled steel tubular columns under axial compression", J. Compos. Construct., 14(1), 125-133. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000056
  3. Fam, A.Z. and Rizkalla, S.H. (2001), "Confinement model for axially loaded concrete confined by circular FRP tubes", ACI Struct. J., 98 (4), 451-461.
  4. Han, L.H. (2002), "Tests on stub columns of concrete-filled RHS sections", J. Construct. Steel Res., 58(3), 353-372. https://doi.org/10.1016/S0143-974X(01)00059-1
  5. Han, L.H. (2007), Concrete Filled Steel Tubular Structures-Theory and Practice, China Science Press, Beijing, P.R. China. [In Chinese]
  6. Han, L.H., Zhao, X.L. and Tao, Z. (2001), "Tests and mechanics model of concrete-filled SHS stub columns, columns and beam-columns", Steel Compos. Struct., Int. J., 1(1), 51-74. https://doi.org/10.12989/scs.2001.1.1.051
  7. Jiang, J.F. and Wu, Y.F. (2012), "Identification of material parameters for Drucker-Prager plasticity model for FRP confined circular concrete columns", Int. J. Solid. Struct., 49(3-4), 445-456. https://doi.org/10.1016/j.ijsolstr.2011.10.002
  8. Karabinis, A.I., Rousakis, T.C. and Manolitsi, G.E. (2008), "3D finite element analysis of substandard columns strengthened by fiber reinforced polymer sheets", ASCE J. Compos. Construct., 12(5), 531-540. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:5(531)
  9. Park, J.W., Hong, Y.K. and Choi, S.M. (2010), "Behaviors of concrete filled square steel tubes confined by carbon fiber sheets (CFS) under compression and cyclic loads", Steel Compos. Struct., Int. J., 10(2), 187-205. https://doi.org/10.12989/scs.2010.10.2.187
  10. Rousakis, T.C., Karabinis, A.I., Kiousis, P.D. and Tepfers, R. (2008), "Analytical modelling of plastic behaviour of uniformly FRP confined concrete members", J. Compos. Part B: Eng., 39(7-8), 1104-1113. https://doi.org/10.1016/j.compositesb.2008.05.001
  11. Tao, Z., Han, L.H. and Zhuang, J.P. (2005), "Using CFRP to strengthen concrete-filled steel tubular columns: stub column tests", Proceeding of the 4th International Conference on Advances in Steel Structures, Shanghai, P.R. China, June.
  12. Tao, Z., Han, L.H. and Zhuang, J.P. (2007), "Axial loading behavior of CFRP strengthened concrete-filled steel tubular stub columns", Adv. Struct. Eng., 10(1), 37-46. https://doi.org/10.1260/136943307780150814
  13. Tao, Z., Uy, B., Han, L.H. and Wang, Z.B. (2009), "Analysis and design of concrete-filled stiffened thin-walled steel tubular columns under axial compression", Thin-Wall. Struct., 47(12), 1544-1556. https://doi.org/10.1016/j.tws.2009.05.006
  14. Teng, J.G., Chen, J.F., Smith, S.T. and Lam, L. (2002), FRP-Strengthened RC Structures, John Wiley & Sons, Ltd., Hoboken, NJ, USA.
  15. Uy, B. (2001), "Strength of short concrete filled high strength steel box columns", J. Construct. Steel Res., 57(2), 113-134. https://doi.org/10.1016/S0143-974X(00)00014-6
  16. Wang, Q.L., Gu, W. and Zhao, Y.H. (2005), "Experimental study on concentrically compressed concrete filled circular CFRP-steel composite tubular stub columns", China Civil Eng. J., 38(10), 44-48. [In Chinese]
  17. Wang, Y.C. and Restrepo, J.I. (2001), "Investigation of concentrically loaded reinforced columns confined with Glass Fiber-Reinforced Polymer Jackets", ACI Struct. J., 98(3), 377-385.
  18. Xiao, Y., He, W.H. and Choi, K.K. (2005), "Confined concrete-filled tubular columns", ASCE J. Struct. Eng., 131(3), 488-497. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:3(488)
  19. Yu, T., Teng, J.G., Wong, Y.L. and Dong, S.L. (2010a), "Finite element modeling of confined concrete-I: Drucker-Prager type plasticity model", Eng. Struct., 32(3), 665-679. https://doi.org/10.1016/j.engstruct.2009.11.014
  20. Yu, T., Teng, J.G., Wong, Y.L. and Dong, S.L. (2010b), "Finite element modeling of confined concrete-II: Plastic-damage model", Eng. Struct., 32(3), 680-691. https://doi.org/10.1016/j.engstruct.2009.11.013
  21. Yu, T., Wong, Y.L., Teng, J.G., Dong, S.L. and Lam, E.S. (2006), "Flexural behavior of hybrid FRPconcrete-steel double-skin tubular members", J. Compos. Construct., 10(5), 443-452. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:5(443)

피인용 문헌

  1. Behavior of light weight sandwich panels under out of plane bending loading vol.21, pp.4, 2016, https://doi.org/10.12989/scs.2016.21.4.775
  2. Flexural Performances of Square Concrete Filled CFRP-Steel Tubes (S-CF-CFRP-ST) vol.18, pp.8, 2015, https://doi.org/10.1260/1369-4332.18.8.1319
  3. Static behavior of axially compressed square concrete filled CFRP-steel tubular (S-CF-CFRP-ST) columns with moderate slenderness vol.110, 2017, https://doi.org/10.1016/j.tws.2016.10.019
  4. Experimental Study on Seismic Performance of Circular Steel Self-Compacting Concrete Elements vol.1094, pp.1662-8985, 2015, https://doi.org/10.4028/www.scientific.net/AMR.1094.245
  5. Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression vol.2018, pp.1687-8094, 2018, https://doi.org/10.1155/2018/7109061
  6. Seismic performance of FRP-reinforced concrete-filled thin-walled steel tube considering local buckling vol.37, pp.9, 2018, https://doi.org/10.1177/0731684418756514
  7. Buckling-restrained brace with CFRP encasing: Mechanical behavior & cyclic response vol.27, pp.6, 2014, https://doi.org/10.12989/scs.2018.27.6.675
  8. Effects of deficiency location on CFRP strengthening of steel CHS short columns vol.28, pp.3, 2018, https://doi.org/10.12989/scs.2018.28.3.267
  9. Compressive strength of circular concrete filled steel tubular stubs strengthened with CFRP vol.39, pp.2, 2014, https://doi.org/10.12989/scs.2021.39.2.189
  10. Analysis of Bearing Capacity of Circular Concrete Filled CFRP-Steel Tubular Beam-Column vol.26, pp.1, 2022, https://doi.org/10.1007/s12205-021-2103-5