Stress Transfer Mechanism at Plastic Hinges of R/C Columns Subjected to Axial Force, Moment and Shear Force

混凝土构件压应力分布的测量方法已基本被提出和发展，但目前尚不能应用于受轴力、弯矩和剪力作用的钢筋混凝土柱，但通过本研究使之成为可能。通过试验获得了几个关于压应力分布的实验数据库，为评价横向钢筋对抗剪性能的贡献以及在轴力、弯矩和剪力作用下将混凝土限制在钻机柱铰链区的受弯压区提供了机理。RIC柱铰链区的压应力分布和抗压强度受剪力的影响很大，抗压强度约为混凝土圆柱体抗压强度的两倍。

The measuring method for compressive stress distributions in concrete member has been almost proposed and developed prier by head investigator was impossible to be applied to reinforced concrete columns subjected to axial force bending moment and shear force.However it has been made possible through this research. Several experimental database on compressive stress distributions have been gained from experimental tests, which should clarify the mechanism to evaluate how the transverse reinforcing bar contribute to resistance to shear force and confine the concrete on flexural compressive zone at hinge region of RIG column subjected to axial force bending moment and shear force.The compressive stress distribution and the compressive strength in flexural compressive zone at hinge region of RIC column has been observed to be extremely influenced by shear force, and the compressive strength has been observed to be approximately twice of compressive strength of concrete cylinder.