Abstract
A numerical method for elastic-plastic buckling analysis of concrete-filled tubular columns with hollow circular section is presented. The elastic-plastic tangent stiffness matrix in the method is constructed by using the tangent coefficient matrix obtained by the numerical integration of the handening moduli of the fibers about the member section to calculate the generalized plastic strain increments. The assumptions that a column deforms in a body and behaves according to the Bernoulli-Euler hypothesis are made in the analysis. The accuracy of the method is examined by comparing the results with available experimental results.
