Strength of slender steel reinforced concrete composite columns

Publisher Summary The chapter presents the experimental study and results of a nonlinear numerical analysis on the behavior of slender steel reinforced high-strength concrete composite columns. Eight full-scale slender columns with rectangular section are tested under axial and eccentric loading conditions. Effects of various geometric and material parameters, such as concrete strength, slenderness of columns, and eccentricity of the applied axial load are studied in the chapter. Significant gains in load capacity are obtained with increased concrete strength for the column subjected to axial load, but the capacity is not strongly influenced by the strength of concrete for the column subjected to eccentric load. The capacity is reduced with increased slenderness ratio and eccentricity. The chapter presents a numerical method for the analysis of pin-ended slender columns. This method, considering material and geometric nonlinearities, is applicable for determining the material failure load or the buckling failure load of a slender steel reinforced concrete composite column. The predicted failure loads are closer to the experimental values.