胡海涛    （青岛建筑工程学院土木工程系 266033）

  叶知满    （清华大学  北京 100084）

[提要]  在现有试验数据的基础上，分析了轴心受压下复合方箍约束混凝土抗压强度随含箍特征值A。和箍筋间距s的变化规律，提出了方箍约束混凝土轴心受压短柱承载力的计算公式，并给出算例。该公式适用于普通强度混凝土和高强度混凝土( C20～C60)。
[关键词]  抗压强度  复合方箍  约束混凝土  含箍特征值

Based on the experimental data, this paper analyses how the strength of the concrete confined by overlapping hoops under axial compression varies with the characteristic value and spacing of hoop. The formula to calculate the loadbearing capacity of the concrete short column confined by overlapping hoops under axial compression is concluded, which is suitable for the general strength concrete and the high strength concrete.
Keywords:  compressive strength; overlapping hoops; confined concrete; characteristic value