抄録
Elastic-plastic ultimate strengths of gable typed rigid frames against the symmetrically distributed vertical loads were examined using the elastic-plastic slope deflection method with the yield hinge at an eave in part (I) of this study. In actual members, there might be considerable yield regions at the stage of failure, and these regions are thought to bring about the lower buckling loads caused by the deterioration of bending stiffness than the predicted values in part (I). In part (II), we obtained a new elastic-plastic buckling analysis method considering the deetrioration of the bending stiffness caused by yield regions, and calculated the failure loads of some model frames using this new analysis method. The results of this study showed that the deterioration of the bending stiffness caused by yield regions brought about considerablly large drop of the elastic-plastic buckling load and the criterion curves showing the transition from asymmetrical buckling failure mode to symmetrical plastic mechanism shifted to more rigid side.
