柱はり接合部内に通し配筋されたはり主筋の付着性状に関する実験と解析

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The slippage of the longitudinal bars through the reinforced concrete beam column joint increases the fixed end rotation and results in the loss in stiffness of the reinforced concrete frame. In order to understand the slippage of the longitudinal bars through the beam column joint quantitatively, it is necessary to examine the bond behavior of the bars in the joint closely. This paper describes the experimental and analytical investigations which put emphasis on the bond behavior of the beam longitudinal bars through the interior of reinforced concrete beam column joint and on the effects of the slippage at the face of column on the deflection of the beam. The conclusions obtained from these experiments and analyses are as follows; (1) For the specimen without axial force of column, the maximum bond stress was neary equal to 40 kgf/cm^2 through the all area in the beam column joint. For the specimens with an axial force of column, the maximum bond stress near the face of column was nearly equal to 40 kgf/cm^2, too, and the bond failure did not occur near the center of the joint. (2) For this reason, the specimen without axial force of column had larger total slippage of longitudinal bar at face of column and loss in stiffness than the specimens with an axial force. (3) The bond stress, when the local bond deterioration occurs near the face of column in the joint, is smaller than that is when the local bond deterioration occurs near the center of the joint. (4) The load-deflection relations, the slippage of the longitudinal bars at the face of column and the strain distributions obtained by FEM analysis in consideration of the bond deterioration near the face of column and cracks agree with the experimental results very well.
社団法人日本建築学会の論文
1985-11-30

柱はり接合部内に通し配筋されたはり主筋の付着性状に関する実験と解析

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