純曲げを受ける供試体寸法の異なるRC梁の塑性変形性能とその変動に及ぼす主筋比の影響

Abstract

This study examined the variations of moment-curvature relationships of reinforced concrete beams without transverse reinforcement under uniform flexural moment and size effect on the flexural plastic deformation capacity of reinforced concrete beams. Concrete compressive strength and the inelastic stress-strain behaviors were examined in terms of the size of specimen by using a stiff compressive testing machine. Considering the probability distribution of materials, the computer simulation was done by the Monte Carlo Method, and the results were compared with ones of the moment-curvature relationships of reinforced concrete simple beams obtained by the experiment. The moment-curvature relationships of reinforced concrete beams are remarkably affected by the size of beam and the percentage of tension reiforcement ratio. Especially, for the beams with large parcentage of tension reinforcement the following results were obtained : the moment-curvature relationships obtained from the experiment are not simillar with the analysis using the stress-strain relations tested under uniaxial compressive loading.