せん断曲げを受ける鉄骨 H 型断面梁の局部座屈挙動と塑性変形能力

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The purpose of this paper is to explain the deformation capacity of steel beams under shear bending. The beams which are chosen in this study have large width-thickness ratio of web. The beams which are chosen in this study have large width-thickness ratio of web. The rotation capacity of beams are examined, considering the influence of the stiffness of the web plate on the local buckling of the flange. This experiments are made in order to explain the plastic behavior of beams and the local buckling behaviors of flange and web plates. The load carrying capacity of the beams under shear bending decrease due to flange local bubkling or web local buckling. The theoretical analysis of the rotation capacity of beams are made, assuming the failure models of flange local buckling and web local buckling from experimental results, and the nondimensional equations of the rotation capacity are presented. In case of beams, which load carrying capacity decrease due to local buckling of flange, the effect of web restraint on flange local buckling is considered. The rotation capacity of beam is expressed by slenderness ratio, width-thickness ratio of flange, and stiffness of web plate. In case of beams, which load carrying capacity decrease due to the local buckling of web plate, the interactive curve between bending stress and shear stress is introduced. The rotation capacity is expressed by the function of the width-thickness ratio of web, shear span and the ratio of shear and bending stress. The beams, which collapse due to local buckling of web plate, have few deformation capacities. In case of beams, which load carrying capacity decrease due to the local buckling of flange, the stiffness of web plate influences on the deformation capacity of beams. Therefore, it is necessary to secure the stiffness of web, in order that the beams have the deformation capacity enough.
社団法人日本建築学会の論文
1977-10-30

せん断曲げを受ける鉄骨 H 型断面梁の局部座屈挙動と塑性変形能力

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