Structural Behaviour of Concrete-Filled Steel Tubular Stub Columns-Comparative Study

Abstract This paper has presented details of a research project to investigate the structural behaviour of Concrete-Filled Steel Tubular (CFST) stub columns through axial load strength. Three series can be distinguished were chosen depending of the steel X-sectional area of the tubes for each series of different shape has been compared: circular, rectangular and square steel sections considering the parameters of the different types of concrete infill, i.e. normal strength concrete (NSC) or high strength concrete (HSC). It is found from these comparisons that all the codes (Eurocode part 4 (EC4), AISC-360-10 and BS5400-5) predicted conservative column strengths compared to the test results and published   theoretical method with an average ratio (0.75for EC4,0.656 for AISC-360-10 and 0.6 for BS5400-5). the main advantages of the ABAQUS software program are it gave closer predictions to the published experimental study results with an average ratio 0.96, simplicity and the savings in test time. circular CFST stub columns strength was higher than square CFST stub columns when compare rectangular and square in same series the column have higher area of concrete have higher strength.