軸引張塑性履歴がある鋼管コンクリート部材の曲げ座屈荷重に関する実験的研究

概要

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The flexural buckling strength of concrete-filled steel tubular members is reduced by the plastic axial stretching. One of the reason of strength reduction is Bauschinger's effect of steel tubes. Another reason is tensile cracks in the filled concrete. The filled concrete, which has cracks due to the tension, has no axial compressive resistance until the cracks close again. When concrete-filled tubular members are used as brace members of building frames under seismic loads, the axial plastic strains of the members have a tendency to be preceded by tension. From this point of view, we show column curves of concrete-filled tubes which are pre-stretched plastically. The column curves are experimentally derived from stub column specimens of concrete-filled tubes.
一般社団法人日本建築学会の論文
1993-03-20