構造体コンクリート強度の部位的変動に関する研究

Abstract

In this study, the strength distribution of structural concrete and the effect of heterogeneity of structural concrete on mechanical behavior, especially fracture mechanism, of reinforced concrete (RC) structure were investigated. Main results are summarized as follows : 1) The distribution of concrete strength in column for casting height may be approximated by the equation of tri-linear type. The variation of concrete strengths between top and bottom of a column is about 26%. 2) The fracture processes of RC frame are affected by the difference of heterogeneity of structural concrete, such as strength variation of concrete. 3) In RC column which the bending moment of top is closer to that of bottom, the progression of damages at upper and lower portions of RC column change by the difference of heterogeneity of structural concrete.