Analysis of circular concrete-filled double skin tubular slender columns with external stainless steel tubes

Behaviour and design of square concrete-filled double skin tubular columns with inner circular tubes

“…7 shows comparisons between the test and FE load-mid-height lateral deflection curves for three samples of slender circular CFST, CFSST and CFDST columns; additional results are also given in Ref. [29]. From the figure, it can be seen that the FE model simulates well the general behaviour of the slender circular concrete-filled columns in terms of the initial stiffness, strength and the post-peak softening behaviour.…”

“…The FE method was successfully employed by the authors in a previous study [29] to investigate the behaviour of slender circular CFDST columns under axial compression, accurately capturing the composite action, concrete damage, as well as local and global instabilities. The model was validated against experiments on slender CFST [30], CFSST (concrete-filled stainless steel tubular columns) [31] and CFDST columns [5].…”

“…The plasticity parameters required by the ''Concrete Damaged Plasticity'' model [12] are the dilation angle, the eccentricity, the ratio of the strength in the triaxial state to that in the uniaxial state and the K parameter. They were taken, respectively, as 20°, 0.1, 1.16 and 0.667 [29,32]. The tensile strength of concrete was taken as…”

Buckling of Slender Concrete-Filled Steel Tubes with Compliant Interfaces

“…Thus, only a few papers have dealt with this subject, see e.g. Goode et al (2010), Romero et al (2011), Portoles et al (2011), Dai et al (2014, and Hassanein and Kharoob (2014). Note, that to date, only Han (2000) has experimentally investigated the buckling behavior of circular CFST columns with very high slenderness ratios.…”

CFDST stub columns having outer circular and inner square sections under compression

“…Next, partially loading and pure torsion tests on CFDST members have been carried out by Yang [14] and Huang [15]. Last, CFDST stub columns with external stainless steel [16,17] can be found.…”