BEHAVIOUR OF COLD-FORMED BUILT-UP COLUMNS UNDER COMPRESSION

Civil engineering

Cold-formed steel sections are widely used due to their high strength, durability and resistance. In this paper, the non-linear behaviour of cold-formed steel battened columns placed back-to-back is considered. The channels are placed in four series with a back-to-back spacing of 25,50,75,100 mm. The behaviour of built-up columns under the effect of axial, eccentric and loading under temperature from ambient to 700 ℃ are considered. About 65 models are generated in ABAQUS 2019 with 2 models as validation. The effect of parameters like channel spacing, batten width, B1/D ratio, varying column length etc. was taken into consideration. The column strength, failure modes, deformed shapes, load vs. displacement, and ultimate loads at different temperature conditions were obtained. Furthermore, the column strengths obtained from the analysis were compared and obtained to a conclusion.

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