Abstract
Safety consideration is primarily based on the yield strength of members. Yield strength of members, however, can not be obtained without numerical integration process, since the moment-curvature relation of the member becomes nonlinear in the inelastic range and secondary bending effect caused by the axial compression may not be neglected in general. Hitherto, many attempts have been made to obtain the explicit expression of the yield strength of the steel beam-column. However these results are in allmost merely the substitution of numerically calculated results, and these applicability is restricted to the individual problem. This study aims at obtaining the approximate analytical solution for general beam-columns. "Equivalent factor method" is suggested, and the analytical result is verified by comparison with the numerical result at test data.
