Research on valuation method establishment of the hinge rotation limit in end of a RC beam

It aims at building the技术evaluated about the rotation limit（ductility ability appraisal）method (shear design method) in a reinforced concrete beam(RC beam) in this research. The RC beamwhich is 1/2-1/3 scale of real size carried out the shear and flexial experiment in 2008 and the2009,partial experiment which modeled the hinge segment of the beam end was conducted in the2010.The hinge region length in a beam end needed to be decided，and the result checked being greatly affected in strength of concrete and an arrangement of steelrods（double line ratio, the amount of shear reinforcement）the space of shear reinforcement) by influencein order to the rotation limit in RC beam. Evaluation by the degree of margin to theflexial capacity of the shear capacity is appropriate to a valuation method. However，stress concentrated without a beam end hinge region spreading，这是必要的，因为这是一个旋转限制是确定的一个早期的舞台。

It aims at building the technique evaluated about the rotation limit(ductility ability appraisal method・shear design method) in a reinforced concrete beam(RC beam) in this research. The RC beam which is 1/2-1/3 scale of real size carried out the shear and flexial experiment in 2008 and the 2009, and the partial experiment which modeled the hinge segment of the beam end was conducted in the 2010.The hinge region length in a beam end needed to be decided, and the result checked being greatly affected in strength of concrete and an arrangement of steel rods(double line ratio, the amount of shear reinforcement, the space of shear reinforcement) by influence, in order to have evaluated the rotation limit in RC beam. Evaluation by the degree of margin to the flexial capacity of the shear capacity is appropriate to a valuation method. However, when stress concentrated without a beam end hinge region spreading, it proposed that it was necessary to take into consideration that a rotation limit is determined at an early stage.