Finite element simulation of circular short CFDST columns under axial compression

Circular concrete-filled double-skin tubular (CFDST) columns increase considerably the displacement ductility and peak strength of the sandwiched concrete due to the confinement provided by the steel tubes. This study describes the characteristics of short CFDST columns under compression and investigates the influences of the sandwiched concrete thickness, the yield stress of outer tube, tube thickness of the both outer and inner components and sandwiched concrete strength on the structural performance of circular short CFDST columns. To obtain the structural behaviour of circular CFDST columns, a finite element analysis is conducted. In this numerical modelling, the choice of the concrete and steel material properties is essential. Accordingly, different steel and concrete models are adapted from previous researches, and then they are verified by comparing their results with the experimental results. The best material models are presented and used in the parametric study which aims at examining the effects of several factors on the load-displacement relationships of the CFDST columns.

[1]  Kojiro Uenaka,et al.  CFDST stub columns having outer circular and inner square sections under compression , 2016 .

[2]  Qing Quan Liang,et al.  Nonlinear analysis of circular double-skin concrete-filled steel tubular columns under axial compression , 2017 .

[3]  X. Zhao,et al.  Double skin composite construction , 2006 .

[4]  Xiao Ling Zhao,et al.  CFDST stub columns subjected to large deformation axial loading , 2010 .

[5]  X. Zhao,et al.  Hardness and compressive capacity of longitudinally welded very high strength steel tubes , 2015 .

[6]  Bo Yang,et al.  Behaviour of Concrete-filled Double-skin Short Columns Under Compression Through Finite Element Modelling: SHS Outer and SHS Inner Tubes , 2018, Structures.

[7]  M J Tomlinson,et al.  SHELL COMPOSITE CONSTRUCTION FOR SHALLOW DRAFT IMMERSED TUBE TUNNELS. , 1990 .

[8]  Raphael H. Grzebieta,et al.  Tests of concrete-filled double skin CHS composite stub columns , 2002 .

[9]  Wei Li,et al.  Behaviour of tapered concrete-filled double skin steel tubular (CFDST) stub columns , 2012 .

[10]  Lin-Hai Han,et al.  Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns , 2004 .

[11]  Saher El-Khoriby,et al.  Confinement effect of stiffened and unstiffened concrete-filled stainless steel tubular stub columns , 2009 .

[12]  Lin-Hai Han,et al.  Analytical behaviour of concrete-filled double skin steel tubular (CFDST) stub columns , 2010 .

[13]  Lin-Hai Han,et al.  Axial strength of concrete-filled double skin steel tubular (CFDST) columns with preload on steel tubes , 2012 .

[14]  Xiao Ling Zhao,et al.  Concrete-filled cold-formed circular steel tubes subjected to variable amplitude cyclic pure bending , 2008 .

[15]  Raphael H. Grzebieta,et al.  Bending tests to determine slenderness limits for cold-formed circular hollow sections , 2002 .

[16]  Lin-Hai Han,et al.  Analytical behavior of CFDST stub columns with external stainless steel tubes under axial compression , 2018, Thin-Walled Structures.

[17]  Ehab Ellobody.  Buckling analysis of high strength stainless steel stiffened and unstiffened slender hollow section columns , 2007 .

[18]  Kojiro Uenaka,et al.  Concrete filled double skin circular stub columns under compression , 2010 .

[19]  W. Ramberg,et al.  Description of Stress-Strain Curves by Three Parameters , 1943 .

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

[21]  Leroy Gardner,et al.  Behaviour and design of square concrete-filled double skin tubular columns with inner circular tubes , 2015 .

[22]  Ehab Ellobody,et al.  Nonlinear behavior of concrete-filled stainless steel stiffened slender tube columns , 2007 .

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

[24]  Hui Jiao,et al.  Imperfection, residual stress and yield slenderness limit of very high strength (VHS) circular steel tubes , 2003 .

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

[26]  Bo Yang,et al.  Plastic and yield slenderness limits for circular concrete filled tubes subjected to static pure bending , 2016 .

[27]  X. Zhao,et al.  Strength and ductility of concrete filled double skin (SHS inner and SHS outer) tubes , 2002 .

[28]  Mohamed A. Shahin,et al.  Neural networks for modelling ultimate pure bending of steel circular tubes , 2008 .

[29]  Brian Uy,et al.  Nonlinear analysis of concrete-filled square stainless steel stub columns under axial compression , 2011 .

[30]  Dennis Lam,et al.  Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular (CFDST) stub columns , 2014 .

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

[32]  Lin-Hai Han,et al.  Concrete-filled double skin steel tubular (CFDST) columns subjected to long-term sustained loading , 2011 .

[33]  Hideo Kimura,et al.  Development of sandwich-structure Submerged tunnel tube production method , 2002 .

[34]  Leroy Gardner,et al.  Description of stress-strain curves for cold-formed steels , 2018, Construction and Building Materials.

[35]  Lin-Hai Han,et al.  Behaviour of concrete-filled double skin rectangular steel tubular beam–columns , 2006 .

[36]  Raphael H. Grzebieta,et al.  Plastic mechanism analysis of concrete-filled double-skin (SHS inner and SHS outer) stub columns , 2002 .

[37]  Raphael H. Grzebieta,et al.  Plastic Collapse Analysis of Slender Circular Tubes Subjected to Large Deformation Pure Bending , 2002 .

[38]  Ali Karrech,et al.  Finite element modelling of concrete-filled double-skin short compression members with CHS outer and SHS inner tubes , 2018, Marine Structures.

[39]  Kang Hai Tan,et al.  Compressive stiffness and strength of concrete filled double skin (CHS inner & CHS outer) tubes , 2010 .

[40]  Raphael H. Grzebieta,et al.  Concrete-filled steel circular tubes subjected to constant amplitude cyclic pure bending , 2004 .

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

[42]  Lin-Hai Han,et al.  Developments and advanced applications of concrete-filled steel tubular (CFST) structures: Members , 2014 .

[43]  Z. Tao,et al.  Concrete-filled double skin (SHS outer and CHS inner) steel tubular beam-columns , 2004 .