Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on circular concrete filled steel tubes with and without shear connectors

  • Chithira, K. (Department of Civil Engineering, National Institute of Technology) ;
  • Baskar, K. (Department of Civil Engineering, National Institute of Technology)
  • Received : 2011.03.18
  • Accepted : 2013.09.23
  • Published : 2014.01.25
⟨ Previous Next ⟩

Abstract

This paper deals with a study on ultimate strength behaviour of eccentrically loaded CFT columns with and without shear connectors. Thirty specimens are subjected to experimental investigation under eccentric loading condition. P-M curves are generated for all the test specimens and critical eccentricities are evaluated. Three different D/t ratios such as 21, 25 and 29 and L/D ratios varying from 5 to 20 are considered as experimental parameters. Six specimens of bare steel tubes as reference specimens, twelve specimens of CFT columns without shear connectors and twelve specimens of CFT columns with shear connectors, in total thirty specimens are tested. The P-M values at the ultimate failure load of experimental study are found to be well agreed with the results of the proposed P-M interaction model. The load-deflection and load-strain behaviour of the experimental column specimens are presented. The behaviour of the CFT columns with and without shear connectors is compared. Experimental results indicate that the percentage increase in load carrying capacity of CFT columns with shear connectors compared to the ordinary CFT columns is found to be insignificant with a value ranging from 6% to 13%. However, the ductility factor of columns with shear connectors exhibit higher values than that of the CFT columns without shear connectors. This paper presents the proposed P-M interaction model and experimental results under varying parameters such as D/t and L/D ratios.

Keywords

References

  1. ASTM International (A370, 2003), Standard Test Methods and Definitions for Mechanical Testing of Steel Products.
  2. Chen, B.C. and Hiroshi, H. (2003), "Eccentricity ratio effects on the behaviour of eccentrically loaded CFST columns", Advances in Structures, Hancock et al. (eds), Swets & Zeitlinger, Lisse, ISBN 90.
  3. Chen, W.F. and Atsuta, T. (1972), "Interaction equations for biaxially loaded sections", J. Struct. Div., ASCE, 98(5), 1035-1052.
  4. Chen, W.F. and Atsuta, T. (1974), "Interaction curves for steel sections under axial load and biaxial bending", Can. Soc. Civil Eng., Eng. J., 17, I-VIII.
  5. Choi, Y.H., Kim, K.S. and Choi, S.M. (2008), "Simplified P-M interaction curve for square steel tube filled with high-strength concrete", Thin-Walled Struct., 46(5), 506-515. https://doi.org/10.1016/j.tws.2007.10.008
  6. De Nardin, S. and El Debs, A.L.H.C. (2007), "Shear transfer mechanisms in composite columns: an experimental study", Steel Compos. Struct., Int. J., 7(5), 377-390. https://doi.org/10.12989/scs.2007.7.5.377
  7. Euro Code 4 (EC 4, 2004) European Committee of Standardisation (draft: Design of composite steel and concrete structures).
  8. Fujimoto, T., Mukai, A., Nishiyama, I. and Sakino, K. (2004), "Behaviour of eccentrically loaded concrete-filled steel tubular columns", J. Struct. Eng., 130(2), 203-212. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(203)
  9. Gopal, S.R. and Manoharan, P.D. (2006), "Experimental behaviour of eccentrically loaded slender circular hollow steel columns in-filled with fibre reinforced concrete", J. Construct. Steel Res., 62(5), 513-520. https://doi.org/10.1016/j.jcsr.2005.09.004
  10. Hatzigeorgiou, G.D. (2008), "Numerical model for the behaviour and capacity of circular CFT columns, Part II: Verification and extension", Engineering Structures, 30(6), 1579-1589. https://doi.org/10.1016/j.engstruct.2007.11.002
  11. Huang, F.Y., Yu, X.M. and Chen, B.C. (2012), "The structural performance of axially loaded CFST columns under various loading conditions", Steel Compos. Struct., Int. J., 13(5), 451-471. https://doi.org/10.12989/scs.2012.13.5.451
  12. IS 10262 (1982), Indian Standard Recommended Guidelines for Concrete Mix Design, Bureau of Indian Standards, New Delhi, India.
  13. IS 456 (2000), Indian Standard Plain and Reinforced Concrete - Code of Practice, Bureau of Indian Standards, New Delhi, India.
  14. IS 1364: Part 1 (2002), Specifications for Hexagon Head Bolts, Screws and Nuts of Product Grades A & B, Bureau of Indian Standards, New Delhi, India.
  15. Lakshmi, B. and Shanmugam, N.E. (2002), "Nonlinear analysis of in-filled steel-concrete composite columns", J. Struct. Eng., 128(7), 922-933. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:7(922)
  16. Liang, Q.Q. (2008), "Nonlinear analysis of short concrete-filled steel tubular beam-columns under axial load and biaxial bending", J. Construct. Steel Res., 64(3), 295-304. https://doi.org/10.1016/j.jcsr.2007.07.001
  17. Liu, D.L. (2006), "Behaviour of eccentrically loaded high-strength rectangular concrete-filled steel tubular columns", J. Construct. Steel Res., 62(8), 839-846. https://doi.org/10.1016/j.jcsr.2005.11.020
  18. Lu, F.W., Li, S.P. and Sun, G.J. (2007), "A study on the behaviour of eccentrically compressed square concrete-filled steel tube columns", J. Construct. Steel Res., 63(7), 941-948. https://doi.org/10.1016/j.jcsr.2006.09.003
  19. O'Shea, M.D. and Bridge, R.Q. (2000), "Design of circular thin-walled concrete filled steel tubes", J. Struct. Eng., 126(11), 1295-1303. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:11(1295)
  20. Patel, V.I., Liang, Q.Q. and Hadi, M.N.S. (2012), "Inelastic stability analysis of high strength rectangular concrete-filled steel tubular slender beam-columns", Interact. Multiscale Mech., Int. J., 5(2), 91-104. https://doi.org/10.12989/imm.2012.5.2.091
  21. Shakir-Khalil, H. (1993a), "Pushout strengths of concrete-filled steel hollow sections", The Structural Engineer, 71(13), 230-233.
  22. Shakir-Khalil, H. (1993b), "Resistance of concrete-filled steel tubes to pushout forces", Struct. Eng., 71(13), 234-243.
  23. Shanmugam, N.E., Lakshmi, B. and Uy, B. (2002), "An analytical model for thin-walled steel box columns with concrete in-fill", Eng. Struct., 24(6), 825-838. https://doi.org/10.1016/S0141-0296(02)00019-6
  24. Xiao, C.Z., Cai, S.H., Chen, T. and Xu, C.L. (2012), "Experimental study on shear capacity of circular concrete filled steel tubes", Steel Compos. Struct., Int. J., 13(5), 437-449. https://doi.org/10.12989/scs.2012.13.5.437
  25. Zeghiche, J. and Chaoui, K. (2005), "An experimental behaviour of concrete-filled steel tubular columns", J. Construct. Steel Res., 61(1), 53-66. https://doi.org/10.1016/j.jcsr.2004.06.006
  26. Zhang, S.M., Guo, L.H. and Tian, H. (2003), "Eccentrically loaded high strength concrete-filled square steel tubes", Advances in Structures, Hancock et al. (eds), Swets& Zeitlinger, Lisse, ISBN 90.

Cited by

  1. Comparative study of stirrup-confined circular concrete-filled steel tubular stub columns under axial loading vol.123, 2018, https://doi.org/10.1016/j.tws.2017.11.033