構造物の復元力特性に関する実験的研究(I) : 鉄筋コンクリート構造純ラーメンに関する実験

概要

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This experimental study carried out for the purpose of studying restoring force characteristics, ductility factor and etc, in the case of generated the yield hinge in column of reinfoced concrete structural portal frames. The test piece is cross section of column 70×70mm, span 650mm and floor height 395mm. The experiment activate the axial force in column and activate untill destruction the respetitive load for girder direction. The destruction due to the bending or shearing crack in column end, and shearing crack differ by difference of axial force in column. The restoring force characteristics is nearly bi-linear type as for axial force in column equal zero, is nearly lemniscate curve (double-spindle) type following axial force in column increase. The relation between the ductility factor (μ) and the ratio of compression stress (σ_c) and 28-day cylinder strengh (F_c) in column (σ_c/F_c) decrease following compression stress in column increase. The ratio k_2/k_1 of the spring constant in plastic range k_2 and elastic range k_1 have a tendency to enlarge with the increase of axial force in column. If the relation between the spring constant ratio in elastic range and plastic range is shown n=1-k_2/k_1, this value n decrease following axial force in column increase.
社団法人日本建築学会の論文
1964-12-30