ひびわれ近傍における異形鉄筋とコンクリートの付着性状に関する実験研究

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This paper describes the experimental and analytical results carried out in order to investigate the bond deterioration in the neighborhood of the crack. The experiments are carried out on the deformed bars subjected to the pull and on the reinforced concrete beams subjected to the bending moment and shear force. The strains of the longitudinal bars and concrete surface are measured in detail and the local bond stress versus the local slip relations are investigated in the neighborhood of the crack, The one of the tested beams is analyzed by FEM using the bond link and crack link mechanism in the consideration of the bond deterioration near the crack based on the experimental results. The conclusions of this paper are as follows ; (1) In the neighborhood of the crack, the maximum bond stress and the bond stiffness are significantly lower than in some distance from the crack. And the deteriorations are not observed on the local bond stress versus the local slip relations in the 3〜4 times as long distance as the diameter of the bar apart from the crack. (2) In the neighborhood of the crack, the maximum bond stress is lower linearly depending on the distance from the crack. (3) The maximum bond stress of the longitudinal bars of beams is lower than that of the bars obtained by pull-out tests. The bond deterioration of the longitudinal bars of beams near the crack, however, shows the similar tendency as the results of the pull-out tests. (4) The load-deflection relations, the strain distribution and the bond stress distribution obtained by FEM analysis in consideration of the bond deterioration near the crack agree very well with the experimental results.
社団法人日本建築学会の論文
1985-02-28

ひびわれ近傍における異形鉄筋とコンクリートの付着性状に関する実験研究

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