NONLINEAR-ANALYSIS OF REINFORCED-CONCRETE COLUMNS BY CUBIC-SPLINE FUNCTION

A numerical method is developed for the determination of complete load -deformation relationships for slender reinforced concrete tied column s with arbitrary cross sections under combined biaxial flexure and axi al load. Improvement of computer time and accuracy has been demonstrat ed, obviously due to the application of cubic B-spline function and in troduction of p-multiplier in the numerical formulation. Comparison of present analysis with other numerical methods and experimental result s appears to show a good agreement.