【摘要】 本文应用结构力学方法,推导得到了单层单跨框架在柱端先后出现塑性铰的过程中,左右柱剪力变化的理论计算公式。应用ABAQUS非线性有限元分析软件及本文的理论公式,对一榀钢筋混凝土框架在塑性铰出现过程中,框架柱剪力分配效应变化进行计算与分析,并与现行规范框架柱剪力设计值进行比较。应用ABAQUS软件分析了轴压比对框架柱剪力重分配的影响,同时探讨了塑性铰出现过程中单层多跨框架的剪力分配系数。结果表明:在钢筋混凝土框架中,未发生塑性铰的框架柱会受到已发生塑性铰框架柱的影响,使得框架柱剪力分配系数增大,导致未发生塑性铰的框架柱承受更大的剪力;当框架内的跨数越多时,强柱越少,在弱柱出现塑性铰后,其剪力分配系数越大。更多还原

【Abstract】 In this paper,the computing formula of shear in frame column are derived in the process of appearing plastic hinge at the end of the column in single-story and single-bay frame by using structure mechanics. The nonlinear finite element analysis software ABAQUS and the proposed formula are used to compute shear distribution coefficients of frame column in the process of appearing plastic hinge at the reinforced concrete frame,and compared with the current standard frame column shear design values. Furthermore,the influence of axial compression ratio on frame column shear distribution is studied,and the shear distribution coefficient of frame column in the process of appearing plastic hinge of one single-story and multi-bay frame is discussed. The obtained results showed that,shear distribution coefficient in the frame column without plastic hinge will be increased and shear in the frame column without plastic hinge will bigger than be that in the frame column with the plastic hinge. For multi-bay frame with several columns,the less strong columns shall appear bigger shear distribution coefficients as the too much weak columns appear plastic hinge.更多还原