部分的に柱浮き上がりを許容した偏心筋違付鉄骨架構の地震応答 : ベースプレートの浮き上がり耐力が応答に及ぼす影響

概要

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Previous studies have suggested that rocking vibration accompanied with uplift motion might reduce the seismic damage of buildings subjected to severe earthquake motions. In this paper, the seismic response of eccentrically braced steel frames with partial columns allowed to uplift is evaluated and compared with that of fixed-base frames by numerical analyses, whose prototype test frame of a full-scale six-story eccentrically braced steel building structure was tested by pseudo-dynamic testing technique in Tsukuba in 1982 to 1984. The results show that the base shears are reduced while the roof drifts and the uplift displacements are increased in the frames with colunm uplift, as compared to the fixed-base frames, on the condition that the uplift yield strength of base plates is less than a half of colunm axial loads.
一般社団法人日本建築学会の論文
2009-03-27