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  胡海濤    （青島建筑工程學(xué)院土木工程系 266033）

  葉知滿    （清華大學(xué)  北京 100084）

[提要]  在現(xiàn)有試驗(yàn)數(shù)據(jù)的基礎(chǔ)上，分析了軸心受壓下復(fù)合方箍約束混凝土抗壓強(qiáng)度隨含箍特征值A(chǔ)。和箍筋間距s的變化規(guī)律，提出了方箍約束混凝土軸心受壓短柱承載力的計(jì)算公式，并給出算例。該公式適用于普通強(qiáng)度混凝土和高強(qiáng)度混凝土( C20～C60)。
[關(guān)鍵詞]  抗壓強(qiáng)度  復(fù)合方箍  約束混凝土  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