曲げ降伏するはりの軸方向伸び現象を考慮した鉄筋コンクリート骨組の弾塑性性状に関する実験研究

概要

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It is well known that the reinforced concrete beam will elongate to the axial direction when beam is tending to yield in bending. If this phenomena occur throughout the every span, the horizontal length of the building will expand as a whole. In considered to expand the slabs and to spread out the columns and the shear walls the elongation in horizontal direction is possibly restrained. Considering such a condition, the beam tending to yield is considered to be subject to the compressive forces from the surrounding structural members. We reported the bending shear experiment of rectangular beam and T-shaped beam which was performed to consider the effect of axial restriction of deformation, through a simple analysis. In this study, cyclic load experiment of reinforced concrete frames is performed to consider the effect of axial restriction of beam deformation. As a result, experiment shows that the story shear strength of reinforced concrete frames increase 50% to 170% because of axial restriction imposed by the horizontal stiffness of columns. This implies a potential that the structure will not collapse in the assumed mechanism.
社団法人日本建築学会の論文
1988-11-30