Experimental and theoretical investigation of concrete filled and encased steel column under compression loading

Abstract

Steel-concrete composite beams find extensive usage in high-rise buildings and bridges. The primary advantages of composite beams are high strength, high ductility, and fire resistance. In this research, the effect of the position of steel tube such as concrete encased and filled steel tube column and concrete filled steel tube column. The author bought Fe250 grade steel from the local market. The steel tube comes in two shapes: circular and rectangular. The entire column was subjected to a concentrated load until it failed. Compared to the concrete encased and filled steel tube column, the concrete filled steel tube column has a higher value of Young's modulus. The theoretical load carrying capacity of CFST is 367.74 kN, which is 19.64% lower than the experimental load carrying capacity. The theoretical load carrying capacity of CFCT is 206.80 kN, which is 28.43% lower than experimental CFCT. Theoretical load carrying capacity of CFST is 26.05% higher than the theoretical load carrying capacity of CFEST. Theoretical load carrying capacity of CFCT is 60.29% higher than theoretical load carrying capacity of CFECT. The theoretical vs experimental load difference is not less than 0.72.