An analytical study on nano-alumina modified concrete in-filled lightgauge steel fluted columns

Abstract

Cold-formed steel sections are widely practiced cutting-edge of steel sections. A wide range of advantages prevails over the functioning of structural elements while cold-formed steel is been used along with the concrete in combination. Cold-formed steel in-filled columns filled with concrete have gained significance in the construction industry in recent times. Columns are built to withstand most of the axial load by the use of a thin-walled cold-formed steel tube by encasing the concrete. Far-reaching research regarding the behaviour, stress and strain characteristics of the columns using Cold-formed steel in-filled columns and the columns are stiffened using flutes which are provided along the length of the column as an integral part of the section of the column. The so-provided flutes will be triangular and rectangular in shape across the cross-section of columns. In this study, the behaviour of eighteen specimens with various types of flutes and thicknesses was examined. Analytical work was done using software for Finite Element Analysis. In this investigation, three cases with three, four, and five flutes each with a steel sheet thickness of one millimetre were taken into consideration. By the analytical investigation, the behavioural patterns of Cold-formed steel in-filled columns with flutes were carried out. From the analytical investigation implies that the load-bearing capacity of columns and the flute shape are directly related to the number of flutes in columns has an influential effect on resistance to higher loads.