TESTS AND ANALYSIS OF STEEL CONCRETE COMPOSITE COLUMNS

An experimental study of the behavior of steel reinforced concrete (SRC) composite columns and results of a nonlinear numerical analysis are presented. Ten slender SRC composite columns were tested under eccentric loading conditions. Effects of concrete strength, slenderness of columns and eccentricity of the axial load are studied. The load-carrying capacity is reduced with increased slenderness ratio and eccentricity. Concrete strength has no obvious influence for eccentrically loaded columns. This paper also presents a nonlinear numerical study of pin ended slender columns. This method is applicable for determining the material failure load or buckling failure load of a slender steel reinforced concrete composite column. In this method both material and geometric nonlinearities are taken into account. The results of numerical analysis correlate well with the test results.