圆钢管赤泥混凝土抗压刚度分析

Compressive stiffness analysis on red mud concrete filled circular steel tube

通过经典弹性力学的理论,运用能量法和最小势能原理对钢管赤泥混凝土进行理论分析,首先推导出小变形条件下的钢管混凝土轴压刚度的理论计算式,在此基础上,利用轴压刚度试验值与理论值的比值与赤泥替代率进行拟合研究,得出钢管赤泥混凝土轴压刚度折减系数,建立钢管赤泥混凝土轴压刚度理论计算公式,并与试验结果进行比较。结果表明:理论计算式的计算值与试验值吻合较好,可较准确的描述钢管赤泥混凝土轴压短柱的抗压刚度,用于指导工程实践。

Based on the theory of classical elastic mechanics,the theory analysis was performed for red mud concrete filled steel tube(CFST)through energy method and minimum potential energy principle.Firstly,the theoretical formula for the axial compression stiffness of CFST under infinitesimal deformation is deduced.On this basis,ratio of experimental value to theoretical value of compressive stiffness and red mud replacement rate conducted regression analysis.The reduction coefficient of axial stiffness of red mud CFST was obtained,and the theoretical calculation formula of axial compression stiffness of red mud CFST was established.The theoretical calculation results are compared with the test results.The results show that the calculated values of the theoretical calculation formula are in good agreement with the experimental values,and the theoretical calculation formula can accurately describe the compressive rigidity of red mud concrete filled steel tubular short columns.It is used to guide the engineering practice.