Numerical modelling of the axial compressive behaviour of short concrete-filled elliptical steel columns

Abstract This paper investigates the axial compressive behaviour of short concrete-filled elliptical steel columns using the ABAQUS/Standard solver, and a new confined concrete stress–stain model for the concrete-filled elliptical steel hollow section is proposed. The accuracy of the simulation and the concrete stress–strain model was verified experimentally. The stub columns tested consist of 150 × 75 elliptical hollow sections (EHSs) with three different wall thicknesses (4 mm, 5 mm and 6.3 mm) and concrete grades C30, C60 and C100. The compressive behaviour, which includes the ultimate load capacity, load versus end-shortening relationship and failure modes, were obtained from the numerical models and compared against the experimental results, and good agreements were obtained. This indicated that the proposed model could be used to predict the compressive characteristics of short concrete-filled elliptical steel columns.

[1]  Lin-Hai Han,et al.  Performance of concrete-filled thin-walled steel tubes under pure torsion , 2007 .

[2]  L. P. Sanez,et al.  DISCUSSION OF EQUATION FOR THE STRESS - STRAIN CURVE OF CONCRETE’ BY DESAYI AND KRISHNAN , 1964 .

[3]  Ehab Ellobody,et al.  Design and behaviour of concrete-filled cold-formed stainless steel tube columns , 2006 .

[4]  Dennis Lam,et al.  Axial capacity of circular concrete-filled tube columns , 2004 .

[5]  Leroy Gardner,et al.  Testing and analysis of concrete-filled elliptical hollow sections , 2008 .

[6]  N. E. Shanmugam,et al.  State of the art report on steel–concrete composite columns , 2001 .

[7]  Dennis Lam,et al.  Behaviour of normal and high strength concrete-filled compact steel tube circular stub columns , 2006 .

[8]  Jin-Guang Teng,et al.  Compressive behavior of carbon fiber reinforced polymer-confined concrete in elliptical columns , 2002 .

[9]  Robert Park,et al.  Strength of Concrete Filled Steel Tubular Columns , 1969 .

[10]  Hsuan-Teh Hu,et al.  NONLINEAR ANALYSIS OF AXIALLY LOADED CONCRETE-FILLED TUBE COLUMNS WITH CONFINEMENT EFFECT , 2003 .

[11]  F. E. Richart,et al.  A study of the failure of concrete under combined compressive stresses , 1928 .

[12]  J. Mander,et al.  Theoretical stress strain model for confined concrete , 1988 .

[13]  Ehab Ellobody,et al.  Nonlinear analysis of concrete-filled steel SHS and RHS columns , 2006 .

[14]  Marinella Fossetti,et al.  Compressive behaviour of concrete elliptical columns confined by single hoops , 2007 .

[15]  William C. Schnobrich,et al.  Constitutive Modeling of Concrete by Using Nonassociated Plasticity , 1989 .

[16]  L. P. Saenz.  Discussion of Equation for the Stress-strain Curve of Concrete by Desayi and Krishman , 1964 .