Abstract
An analytical method for evaluating the effect of flexural torsional buckling on the inelastic behavior of H-shaped steel beam-columns which are subjected to axial compression and strong-axis bending was presented. A H-shaped column can be considered to be composed of two T-shaped columns halved by the centroid-axis of the H-shaped column. Basic equations of equilibrium of those T-shaped columns in the post-buckling state were derived and rigidities which correspond to each plastic state were definitely expressed in terms of deflection due to buckling. Two methods for numerical integration of the basic equations were introduced; the approximate method and the exact method. The approximate method can give almost same results as the exact does. Analytical results were compared with a series of test results and good agreement between them was ascertained.
