横方向プレストレスを導入したRC柱の付着性状に及ぼす能動的拘束の影響

概要

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Experiments and 3-D FEM analyses were performed on reinforced concrete columns laterally prestressed by the shear reinforcements to study the influence of the active confinement upon bond splitting strength and crack behaviors. Many strain gauges were glued on main bars to investigate the bond stress and the width of every crack over transverse hoops were measured by a microscope. The lateral pressure increases the bond splitting strength as well as the shear crack strength and the ultimate shear strength, and decreases the widths of cracks. The FEM analyses using bond-slip model can evaluate the shear crack strength and ultimate shear strength, and provide valuable information about the effect of the active confinement on the bond behaviors by evaluating the intensity of confinement in tri-axial state of stress with minor principal stress and equivalent confining pressure.
社団法人日本建築学会の論文
2006-10-30