钢筋混凝土偏心受压柱的受剪承载力研究

Shear strength of eccentrical compression reinforced concrete column

基于主拉应力强度准则,通过理论分析给出了混凝土和轴向压力的受剪贡献,采用45°桁架理论估计箍筋的受剪贡献,提出了钢筋混凝土柱受剪承载力理论公式。根据搜集到的86组钢筋混凝土柱受剪性能试验数据,对理论公式的精确性进行校核,发现理论公式计算值比试验值偏高。然后运用非线性回归方法对理论公式进行修正,修正后的钢筋混凝土柱受剪承载力计算公式计算值与试验值吻合较好。最后提出了具有一定安全储备的受剪承载力计算公式和相应的设计公式。

Based on the principal tensile stress strength criterion, the shear contribution of concrete and axial compressive force was built by theoretical analysis, and that of stirrups was estimated using 45 ° truss theoretical model, therefore the theoretical formula of shear strength of reinforced concrete column was proposed. According to 86 test datum of shear performance of reinforced concrete columns, the accuracy of the theoretical formula was checked. The calculated results show that the calculation values of theoretical formula are higher than that of the experiment. So the theoretical formula was revised by using non-linear regression method. Formula value of the amended shear strength of reinforced concrete column is in good agreement with the experimental results. Finally, the shear strength formula with a certain safety reserves and the corresponding design formula were established.