Behaviour of SFRC Filled Cold Formed Steel Built-Up Columns

Due to the appropriate composite action between the steel and concrete, steel concrete composites are gaining popularity in civil industry. Steel that are used in field is of different type. One such variety is Cold Formed Steel, CFS have comparatively high yield point and tensile strength making it suitable for wide range of applications. SFRC is claimed as modern cost-efficient building material as its exhibits more ductile failure. It eliminates the brittle failure in the concrete. In this study twelve built-up column is modelled in solid works and evaluated using ANSYS workbench software. 0.6, 1.2 and 1.8% of steel fibers are added to the infilled concrete and axial load is applied. It is further compared with the analysis of normal concrete filled built-up column. From the analysis report, SFRC filled built-up column has more bearing capacity than the ordinary concrete filled column. The columns filled with 1.8% of steel fiber possess more ductility index and ultimate load capacity. It has less lateral deformation compared to other models. In overall adding steel fibers to concrete increases the ductility and load bearing capacity of the column.