DOI QR코드

DOI QR Code

Confining effect of concrete in double-skinned composite tubular columns

  • Won, Deok Hee (Coastal Engineering, Korea Institute of Ocean Science and Technology) ;
  • Han, Taek Hee (Coastal Engineering, Korea Institute of Ocean Science and Technology) ;
  • Kim, Seungjun (Marine Research Institute, Samsung Heavy Industries Co. Ltd.) ;
  • Lee, Jung-Hwa (Department of Architectural, Civil and Environmental Engineering, Korea University) ;
  • Kang, Young-Jong (Department of Architectural, Civil and Environmental Engineering, Korea University)
  • 투고 : 2013.12.09
  • 심사 : 2014.08.20
  • 발행 : 2014.11.28

초록

A double-skinned composite tubular (DSCT) column, which consists of concrete and inner and outer tubes, was finally developed to overcome the weaknesses of concrete filled tube columns by reducing the self-weight of the column and confining the concrete triaxially. Research pertaining to the stiffness and strength of the column and the confining effect in a DSCT column has been carried out. However, detailed studies on the confining stress, especially the internal confining stress in a DSCT column, have not been carried out. Internal and external confining stresses should be evaluated to determine the effective confining stress in a DSCT column. In this paper, the confining stresses of concrete before and after insertion of an inner tube were studied using finite element analysis. The relationship between the internal or external confining stresses and the theoretical confining stress was investigated by parametric studies. New modified formulae for the yield and buckling failure conditions based on the formulae suggested by former researchers were proposed. Through analytical studies, the modified formulae were verified to be effective for economic and reasonable design of the inner tubes in a DSCT column under the same confining stress.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Land, Transportation

참고문헌

  1. ABAQUS Manual 6.9.1, SIMULIA, 2010
  2. Andres, W.C., Oreta, Jason, M.C. and Ongpeng (2011), "Modeling the confined compressive strength of hybrid circular concrete columns using neural networks", Comput. Concr., 8 (5), 597-616. https://doi.org/10.12989/cac.2011.8.5.597
  3. Bahrami, A., Hamidon, W. Badaruzzaman, W. and Osman, S.A. (2012), "Structural behaviour of tapered concrete-filled steel composite (TCFSC) columns subjected to eccentric loading", Comput. Concr., 9(6), 403-426. https://doi.org/10.12989/cac.2012.9.6.403
  4. Han, T.H, Stallings, J.M. and Kang, Y.J. (2010), Nonlinear Concrete Model for Double-Skinned Composite Tubular Columns", Construct. Build. Mater., 24 (12), 2542-2553 https://doi.org/10.1016/j.conbuildmat.2010.06.001
  5. Im, S.B., Han, T.H., Han, S.Y. and Kang, Y.J. (2006), Stress-strain relations of concrete according to the confining conditions, J. Korean Soc.Civil Eng., 26(4A), 743-52.
  6. Kerr, A.D. and Soifer, M.T. (1996), The linearization of the prebuckling state and its effects on the determined instability load, J. Appl. Mech., 36(4), 775-85.
  7. Rasheed, H.A., Abd El-Fattah, A.M., Esmaeily, A., Jones, J.P. and Hurst, K.F. (2012), "Software for adaptable eccentric analysis of confined concrete circular columns", Comput. Concr., 10(4),
  8. Shakir-Khalil, H. and Illouli, S. (1987), Composite columns of concentric steel tubes. In: Proceeding of Conference on the Design and Construction of Non Conventional Structures, 73-82.
  9. Shraideh, M.S. and Aboutaha, R.S. (2013), "Analysis of steel-GFRP reinforced concrete circular columns" Comput. Concr., 11(4),
  10. Shrestha, R., Smith, S.T. and Samali, B. (2013), "Finite element modelling of FRP-strengthened RC beam-column connections with ANSYS" ,Comput. Concr., 11(1),
  11. Tao, Z., Han, L.H. and Zhao, X.L. (2004), Behavior of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam columns, J. Construct. Steel Re., 60(8), 1129-58. https://doi.org/10.1016/j.jcsr.2003.11.008
  12. Tong, Z.S. and Lin, X.G. (2005), Basic Behavior of Centrifugal Hollow Concrete-filled Steel Tube (H-CFST) Stub Columns under Axial Compression. Korea Society of Steel Construction, 5, 299-304.
  13. Tsai, H.C. (2013), "Polynomial modeling of confined compressive strength and strain of circular concrete columns", Comput. Concr., 11 (6),
  14. Wei, S., Mau, S.T., Vipulanandan, C. and Mantrala, S.K. (1997), Performance of new sandwich tube under axial loading: Experiment, J. Struct. Eng., 121(12), 1806-1814.
  15. Zhao, X.L. and Grzebieta, R. (2002), Strength and ductility of concrete filled double skin (SHS inner and SHS outer) tubes", Thin-Walled Structures, 40(2), 199-213. https://doi.org/10.1016/S0263-8231(01)00060-X
  16. Zhu, W.C., Ling, L., Tang, C.A., Kang, Y.M. and Xie, L.M. (2012), "The 3D-numerical simulation on failure process of concrete-filled tubular (CFT) stub columns under uniaxial compression", Comput.and Concr., 9(4), 2012

피인용 문헌

  1. Behaviour of a column–bent cap connection for a precast DSCT column vol.70, pp.2, 2018, https://doi.org/10.1680/jmacr.16.00497