鉄骨ラーメンの弾塑性安定に関する実験的研究 : (その 4) 繰返し水平力を受ける H 形鋼集合材

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The behavior of steel tall building frames under constant vertical loads and alternating horizontal force was studied experimentally, using knee type subassemblages which were fundamental element of inner portion of multi-bay multi-story frames. Test frames were made by welding beams and columns of mild steel rolled wide flange sections. It is observed that the shape of horizontal force-displacement curves greatly depend on the magnitude of the vertical loads and the type of frame collapse mechanism. In the case that the vertical loads are o or small and the column sections do not yield at first, the hysteresis loop of frame behavior do not become unstable and get to steady state with the repetition of horizontal loading. However, in the case that the vertical loads are large and first yield occurs at column sections, the hysteresis loop become unstable but the restoring force of frames increases with the repetition of horizontal loading. The final horizontal restoring force nearly corresponds to the strength calculated on the assumption that the resisting moment of column section converges to the full plastic moment of section with no axial force. Experimental hysteretic behavior is fairly well predicted by elastic-plastic analysis based on the two assumed bending moment-curvature relations. An apporoximate, yet simple analytical method of hystereticl behavior of subassemblages is also proposed in this paper.
社団法人日本建築学会の論文
1972-05-30

鉄骨ラーメンの弾塑性安定に関する実験的研究 : (その 4) 繰返し水平力を受ける H 形鋼集合材

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