Experimental Investigation of the Interaction of Local and Overall Buckling of Stainless Steel I-Columns

Interactive buckling in long thin-walled rectangular hollow section struts

“…I-section struts [10,22] and stiffened plates [11]. These analytical models show very good quantitative comparisons with FE results and existing experimental results [9]. Moreover, snap-backs in the response, showing sequential destabilization and restabilization and a progressive spreading of the local buckling mode from mid-span, known as cellular buckling [23], are captured well by these models, which have also been observed in physical experiments on thin-walled struts [9] and beams [24].…”

“…The interaction between individual modes can lead to a profound change in the post-buckling behaviour, even though these modes may be stable when triggered in isolation. In particular, such systems can exhibit a violent destabilization after the peak load is reached [9,10,11] and, in certain parametric ranges, have been demonstrated to be highly sensitive to initial geometric imperfections [12,13,14,15,16,17,18,19].…”

Cross-sectional optimization of cold-formed steel channels to Eurocode 3

“…These techniques have been extensively verified against the experiment [18,19], revealing excellent predictive power with an average ratio of the predicted to the measured capacity of 0.97-1.0 with standard deviations in the range of 0.03-0.06.…”

Testing and numerical modelling of lean duplex stainless steel hollow section columns

“…Local geometric imperfections were measured only over the middle half of each specimen's length in order to eliminate the effect of end flaring, which results from the release of residual stresses following cutting operations [19]. The same approach has been successfully adopted in previous studies [20,21]. The maximum measured local geometric imperfection w 0 for each nominal stub column dimension is given in Table 5.…”