矩形截面框架柱双向受剪承载力公式可靠性指标

利用JC法对66根矩形截面钢筋混凝土框架柱双向受剪承载力进行统计分析，确定《混凝土结构设计规范》（GB50010-2010）（规范）计算矩形截面框架柱双向受剪承载力公式的可靠性指标届。然后，将规范公式计算的可靠性指标与三折线法和最小体积用钢量法计算的可靠性指标进行比较。结果表明，规范公式计算的可靠性指标口值大于3．7，满足要求。而且，与其他两种方法相比，规范公式所对应的口值更大，说明采用规范公式计算矩形截面框架柱双向受剪承载力时，具有更好的可靠性。

Reliability index of formula for bilateral shear strength of rectangular frame column

To determine the reliability index/~ of formula in the Code for Design of Concrete Struc- ture （GB50010-2010）（CODE）, JC was used to calculate bilateral shear strength of reinforced concrete frame column with rectangular section in design, the bilateral shear strengths of 66 rectangular frame col- umns were statistically analyzed by JC method. Then, the reliability index got from CODE formula was compared with those acquired by the method of three polygonal line and minimum stirrups, respectively. The comparison results showed that the reliability index obtained form CODE formula was greater than 3.7, which agreed with the requirement of target reliability index. Moreover, the results also suggested that the reliability index gained from CODE formula was greater than those obtained by the other two methods, and the formula for bilateral shear strength of rectangular frame column in CODE had a better reliability.