Abstract
In recent times, cold formed steel (CFS) is extensively used in residential and commercial buildings due to its high strength to self-weight ratio and easiness of construction. The manufacturing of CFS sections are done at the room temperature by rolling or pressing. Built-up composite box sections are becoming popular for column members in CFS construction. The structural elements can be of columns, studs, beams, floor decking, built up sections and other any parts of the structure. In this paper, multilimbed built-up box sections are made with identical lipped channels, connected at their flanges with self-drilling screws. In this arrangement, buckling of the individual channel is prevented by the screws. To make the columns more stronger, these multilimbed hollow sections are filled with ultra light weight concrete. This study is to investigate the axial performance of composite multilimbed light weight CFS built-up column in ANSYS software. Initially three limbed I section is modeled as hollow and analyzed under axial load. Then partially filled and fully filled sections are modeled and analyzed. Finally the behaviour of each section is compared with a conventional steel column (ISMB150).
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