Behaviour of Light Gauge Steel Box Columns Infilled with Concrete Containing Natural and Artificial Fibres

Abstract

The present study mainly describes about the behaviour of concrete filled steel tubular columns (CFST), in which different types of concrete are incorporated such as steel fibre reinforced concrete, carbon fibre reinforced concrete, glass fibre reinforced concrete, coir fibre reinforced concrete, jute fibre reinforced concrete and sisal fibre reinforced concrete. The behaviour of column was studied with three different slenderness ratios of 20,40 and 70 which is mentioned as stub, short and medium columns respectively. Three grades of concrete such as M40, M50 and M60 were adopted for the concrete infill. In addition, conventional concrete filled steel tubular columns and hollow steel tubular columns were axially tested and the results were compared to the fibre reinforced concrete filled steel tubular columns. newlineIn order to determine the optimum fibre reinforced concrete mix to be infilled into the light gauge steel tubular columns, optimization of various fibre reinforced concrete mix was carried out with the compressive strength test results. For three different grades of concrete such as M40, M50 and M60 grades of concrete, optimization was performed by adding different percentages of fibres such as 0%, 0.5%, 1.0%, 1.5% and 2.0%. Cubical specimens measuring 150mm on each side were employed to assess the compressive strength of the various FRC mixtures newline