鉄骨ラーメンの弾塑性安定に関する実験的研究 : (その 2) H 形鋼部材より成る門形ラーメン

概要

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An experimental study was made of the behavior of single bay, one-and two-storeyed frames, using mild steel models with Wide flange sections. Test specimens were rigid frames of continuous welded construction and composed of two similarly made plane portal frames, both being connected to each other in order to prevent lateral buckling of the frames. A varying horizontal force was applied at the top of a frame model under a constant vertical load on the columns. From the horizontal force-displacement relation, a considerable reduction was observed in the restoring force due to the column loads, indicating the importance of the unstable character due to dead loads on the horizontal restoring force in tall buildings. The stability limit displacement at which a frame became unstable was about 1.5/100 times that of the column height. Experimental behavior are fairly well predicted by two theoretical analyses. The one is elastic-plastic compatibility analysis which takes account of shearing deformation of frame members and the effect of rigid region at connection panel, and the other is plastic hinge analysis baced on the assumption that the frame gets strain-hardened upon arising of the mechanism state.
社団法人日本建築学会の論文
1972-03-28