鉄筋コンクリート柱の曲げ終局耐力算定式と強度包絡曲面

概要

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Using the assumptions of stress-strain relationship and of strain distribution, we computed the ultimate bending strength about 7500 models of reinforced concrete columns in each principal and diagonal axis of a cross section under constant axial forces. On the basis of these values, we propose the equations which can evaluate the ultimate bending strength about principal and diagonal axes under all range of axial force. And using them, we show the interaction curved surface of column strength. The proposed equations consist of Eq. (6)〜Eq. (22) and some examples of interaction curved surface are shown in Fig. 10(a), Fig. 10(b). These equations are formed with hyperbolic tangent function of normalized axial force and their coefficient are expressed with the total strength of concrete (C_0) and reinforcement (T_0) respectively and the distance between tension and compression center of reinforcement gravity (g_0, g_1, g_2, g_3) of each cross section. The values, calculated on these equations (Mu. eq), are good approximation to the 7500 computed models (Mu. cal) and correspond to the 82 results of our experiment (Mmax).
社団法人日本建築学会の論文
1986-08-30