水平力を受ける鋼骨組の弾塑性挙動の解析 : 骨組塑性率と局所塑性率(一般講演)

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In this paper, correlation among story-drift, rotation angle of members in the plastic range and the magnitude of local plastic strain of plate elements of steel rigid frames under the severe earthquakes is discussed relating to the load carrying capacity and ductility response of the frames. Beam-collapse-type-frames and column-collapse-type-frames are analyzed. It is certified for both types of the frames that analytical results of the 〓 -type-frames are applicable to the 〓 -type-frames and the 〓 -type-frames in the intermediate stories. On beam-collapse-type-frames, In the case of the 1story-1span-frame whose column bases are fixed, the behavior can not be represented by the simple frame, since the inflection point in columns moves. In the case that the cold formed columns are used in the column-collapse-type-frames, local strain intends to reach the breaking strain under the simple tension tests by the post experiments, even when the frame ductility response is not very large. In such case, special consideration in design process is needed. In the case of the 1story-1span-frame and 1 story-2span-frame, the behavior can be represented by that of the simple frame with stiffer beams. The examples of the design charts in which the correlation among the magumitudes of plastic deformation of frames, members and local plastic curvature is taken into conciderarion, was derived from analysis.
一般社団法人日本建築学会の論文
1994-03-15