Behaviour of concrete-filled steel tubes under static and variable repeated loading

Incremental collapse threshold for pushout resistance of circular concrete filled steel tubular columns

“…These results show that the incremental collapse limit obtained for all the specimens under VRL lies between 70% and 78.9% of the static collapse load of similar specimens and the shakedown limits observed from the plots are closer to 60%. Similar results were obtained by the authors for the axial deflection response of eccentrically loaded CFT stub columns [29]. …”

Theoretical study on concrete-filled steel tubes under static and variable repeated loadings

“…HST and CFST columns with large eccentricity of loading (30 mm) fail at a lower upper limit load level (P max ) than the columns with small eccentricity of loading. It is likely that 15 mm eccentricity and CFST columns with 15 mm eccentricity and 80 MPa concrete respectively, show the similar loading patterns achieved in the experiment [21] and in the analysis. The relationships obtained in the analyses of the other four columns are also found to be similar to the experimental relationships.…”

“…In the experimental study, column behaviour is investigated through testing long CFST and HST columns under SL and VRL [21] and interface bond strength behaviour is investigated through Static and VRL pushout tests [22]. The experimental investigation on the column behaviour revealed that the failure of the columns is due to instability and incremental collapse when subjected to SL and VRL respectively.…”

“…In the theoretical study, simple mathematical models have been formulated to analyse the behaviours of CFST and HST columns similar to the columns tested in the experimental study [21,22] under the same loading conditions. The results of both investigations are compared to verify the theoretical models.…”

Tests on inclined, tapered and STS concrete-filled steel tubular (CFST) stub columns

“…These literature had been reviewed by Schneider [1] and Han [2]. In recent few years, some more research have been performed on CFST stub columns, such as Han and Yao [3], Han et al [4,5], Lam et al [6], Liang et al [7], Tao et al [8], Thayalan et al [9], Zhao and Packer [10]. There were also some research reported on concrete-filled stainless steel tubular stub columns, such as Dabaon et al [11,12], Lam et al [13], Tao et al [14], and concrete-filled aluminum stub columns (Zhou and Young [15]).…”