Performance of New Sandwich Tube under Axial Loading: Analysis

Performance of concrete-filled double-skin circular tubes in compression

“…The experimental results from the empty steel tubes were relatively close to the predicted strength based on the material yield values. Consistent with the tests results of Wei et al [7] and Tao et al [8], the outer tubes failed by outward local buckling and the inner tubes by inward local buckling. In this work, outward local buckling manifested as an outward fold near the ends and diagonal failure near the centre.…”

“…Tao et al's [8] results suggest that there is no enhancement; Uenaka et al's [10] results suggest that confinement ranges from 0 to 41%, and Wei et al's [7] results suggest that the test specimen have an average of 15% confinement. Based on this discussion it is inconclusive to judge whether there is useful confinement in CFDSCT or not, however, in most results, the test-to-predicted strength suggests that the test values can clearly be represented by the sum of the individual strengths of the materials.…”

“…[ 6,7] tested 26 stub CFDSCT columns with outer tube diameters ranging from 74.7 to 114.3 mm and inner tube diameters ranging from 61.2 to 88.9 mm. The diameter-to-thickness ratio of the outer tubes varied from 43 to 169.…”

Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns

“…CFDSTs were firstly introduced as a new form of construction for vessels to resist external pressure [3]. More recently, they were mainly studied by several researchers as columns or beams, such as Elchalakani et al [2], Lin and Tsai [4], Wei et al [5,6], Yagishita et al [7], Zhao and Grzebieta [8], Zhao et al [1,9]. These studies highlighted the increasing demand and strong potential of using CFDST in offshore construction, highways and high-rise bridge piers.…”

Behavior of concrete-filled double skin steel tubular columns with octagon section under axial compression

“…The mechanical properties of CFDSST short members with the circle section subjected to axial compression are investigated in Refs. [2][3][4][5], and the mechanical properties of CFDSST with circular section which is subjected to axial compression and eccentricity compression and circular CFDSST members subjected to axial compression and bending moment simultaneously can be located in Refs. [6][7][8].…”