COUPLED BUCKLING BEHAVIOR AND PLASTIC DEFORMATION CAPACITY OF H-SHAPED STEEL BEAMS UNDER CYCLIC BENDING SHEAR

Abstract

In this research, in order to clarify the coupled instability behavior of H-shaped steel beams under the bending shear stress, the cyclic loading tests was carried out, with a comparatively large web plate slenderness. As a result, the useful factor for coupled buckling design method of H-shaped steel beams was proposed. This method can treat systematically lateral buckling, local plate buckling and those coupled instability behavior. Its attention is paid to elastic lateral buckling strength and elastic plate local buckling strength. Characteristic of buckling behavior, coupled effect and range of coupled instability were clarified using both buckling strength ratio.