Steel and Composite Structures

  • 제26권6호
  • /
  • Pages.693-703
  • /
  • 2018
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Composite action of hollow concrete-filled circular steel tubular stub columns

  • Fu, Qiang (School of Civil Engineering, Central South University) ;
  • Ding, Fa-xing (School of Civil Engineering, Central South University) ;
  • Zhang, Tao (School of Civil Engineering, Central South University) ;
  • Wang, Liping (School of Civil Engineering, Central South University) ;
  • Fang, Chang-jing (School of Civil Engineering, Central South University)
  • 투고 : 2017.09.22
  • 심사 : 2018.01.11
  • 발행 : 2018.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

To better understand the influence of hollow ratio on the hollow concrete-filled circular steel tubular (H-CFT) stub columns under axial compression and to propose the design formula of ultimate bearing capacity for H-CFT stub columns, 3D finite element analysis and laboratory experiments were completed to obtain the load-deformation curves and the failure modes of H-CFT stub columns. The changes of the confinement effect between core concrete and steel tube with different hollow ratios were discussed based on the finite element results. The result shows that the axial stress of concrete and hoop stress of steel tube in H-CFT stub columns are decreased with the increase of hollow ratio. AfteGr the yield of steel, the reduction rate of longitudinal stress and the increase rate of circumferential stress for the steel tube slowed down. The confinement effect from steel tube on concrete also weakened slowly with the increase of hollow ratio. Based on the limit equilibrium method, a simplified formula of ultimate bearing capacity for the axially loaded H-CFT stub columns was proposed. The predicted results showed satisfactory agreement with the experimental and numerical results.

키워드

참고문헌

  1. Aslani, F., Uy, B., Tao, Z. and Mashiri, F. (2015), "Predicting the axial load capacity of high-strength concrete filled steel tubular columns", Steel Compos. Struct., Int. J., 19(4), 967-993. https://doi.org/10.12989/scs.2015.19.4.967
  2. Aslani, F., Uy, B., Wang, Z. and Patel, V. (2016), "Confinement models for high strength short square and rectangular concretefilled steel tubular columns", Steel Compos. Struct., Int. J., 22(5), 937-974. https://doi.org/10.12989/scs.2016.22.5.937
  3. Albaredavalls, A. and Carreras, J.M. (2015), "Efficiency of stiffening plates in fabricated concrete-filled tubes under monotonic compression", Steel Compos. Struct., Int. J., 18(4), 1023-1044. https://doi.org/10.12989/scs.2015.18.4.1023
  4. Chang, X., Fu, L., Zhao, H.B. and Zhang, Y.B. (2013), "Behaviors of axially loaded circular concrete-filled steel tube (CFT) stub columns with notch in steel tubes", Thin-Wall. Struct., 73(12), 273-280. https://doi.org/10.1016/j.tws.2013.08.018
  5. Chang, X., Luo, X., Zhu, C. and Tang, C. (2014), "Analysis of circular concrete-filled steel tube (CFT) support in high ground stress conditions", Tunn. Undergr. Space Technol., 43(7), 41-48. https://doi.org/10.1016/j.tust.2014.04.002
  6. Cascardi, A., Micelli, F. and Aiello, M.A. (2016), "Unified model for hollow columns externally confined by FRP", Eng. Struct., 111, 119-130. https://doi.org/10.1016/j.engstruct.2015.12.032
  7. Ding, F.X., Ying, X.Y. and Zhou, L.C. (2011a), "Unified calculation method and its application in determining the uniaxial mechanical properties of concrete", Front. Archit. Civ. Eng. China., 5(3), 381-393. https://doi.org/10.1007/s11709-011-0118-6
  8. Ding, F.X., Yu, Z.W. and Bai,Y. (2011b), "Elasto-plastic analysis of circular concrete-filled steel tube stub columns", J. Struct. Eng., 67(10), 1567-1577.
  9. Ding, F.X., Fang, C.J., Bai, Y. and Gong, Y.Z. (2014), "Mechanical performance of stirrup-constrained concrete-filled steel tubular stub columns under axial loading", J. Constr. Steel Res., 98(11), 146-157. https://doi.org/10.1016/j.jcsr.2014.03.005
  10. Ellobody, E. (2013a), "Numerical modelling of fibre reinforced concrete-filled stainless steel tubular columns", Thin-Wall. Struct., 63, 1-12.
  11. Ellobody, E. (2013b), "Nonlinear behaviour of eccentrically loaded FR concrete-filled stainless steel tubular columns", J. Constr. Steel Res., 90, 1-12. https://doi.org/10.1016/j.jcsr.2013.07.018
  12. Feng, P., Cheng, S., Bai, Y. and Ye, L. (2015), "Mechanical behavior of concrete-filled square steel tube with frp-confined concrete core subjected to axial compression", Compos. Struct., 123(5), 312-324. https://doi.org/10.1016/j.compstruct.2014.12.053
  13. Hassanein M.F. and Kharoob, O.F. (2014), "Analysis of circular concrete-filled double skin tubular slender columns with external stainless steel tube", Thin-Wall. Struct., 79(6), 23-37. https://doi.org/10.1016/j.tws.2014.01.008
  14. Hua, W., Wang, H.J. and Hasegawa, A. (2014), "Experimental study on reinforced concrete filled circular steel tubular columns", Steel Compos. Struct., Int. J., 17(4), 517-533. https://doi.org/10.12989/scs.2014.17.4.517
  15. Hu, Q.H., Xu, G.L. and Wang, H.W. (2005), "The strength calculation of various centrifugal hollow concrete filled steel tube (H-CFST) members under compression", J. Harbin Inst. Tech., 37(Sup.), 149-152. [In Chinese]
  16. Kvedaras, A.K. and Sapalas, A. (1999), "Research and practice of concrete-filled steel tubes in Lithuania", J. Constr. Steel Res., 49(2), 197-212. https://doi.org/10.1016/S0143-974X(98)00218-1
  17. Kuranovas, A. and Kvedaras, A.K. (2007), "Behaviour of hollow concrete-filled steel tubular composite elements", J. Civ. Eng. Manage., 13(2), 131-141.
  18. Kim, J.K., Kwak, H.G. and Kwak, J.H. (2013), "Behavior of hybrid double skin concrete filled circular steel tube columns", Steel Compos. Struct., Int. J., 14(2), 191-204. https://doi.org/10.12989/scs.2013.14.2.191
  19. Lai, M.H. and Ho, J.C.M. (2013), "Uni-axial compression test of concrete-filled-steel-tube columns confined by tie bars", Proc. Eng., 57(1), 662-669.
  20. Patel, V.I., Uy, B., Prajwal, K.A. and Aslani, F. (2016), "Confined concrete model of circular, elliptical and octagonal cfst short columns", Steel Compos. Struct., Int. J., 22(3), 497-520. https://doi.org/10.12989/scs.2016.22.3.497
  21. Qu, X., Chen, Z. and Sun, G. (2015), "Axial behaviour of rectangular concrete-filled cold-formed steel tubular columns with different loading methods", Steel Compos. Struct., Int. J., 18(1), 71-90. https://doi.org/10.12989/scs.2015.18.1.071
  22. Yu, M., Zha, X.X., Ye, J.Q. and Li, Y.T. (2013), "A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression", Eng. Struct., 49(2), 1-10. https://doi.org/10.1016/j.engstruct.2012.10.018

피인용 문헌

  1. Mechanical behavior of outer square inner circular concrete-filled dual steel tubular stub columns vol.38, pp.3, 2018, https://doi.org/10.12989/scs.2021.38.3.305