钢管膨胀混凝土轴向极限承载力的有限元分析

Finite Element Analysis of Ultimate Axial Bearing Capatity of Expansive Concrete Filled Steel Tube

本文采用ANSYS软件分析了膨胀剂掺量分别为6%、8%、10%、12%和20%的钢管膨胀混凝土60d龄期的轴向极限承载力,并将分析结果与试验结果进行对比。研究结果表明:钢管膨胀混凝土轴向极限承载力随膨胀剂掺量的增加先增大后减小,膨胀剂掺量为12%时达到最大,且比普通钢管混凝土提高了9.4%。有限元分析结果高于试验结果,但两者吻合良好,因此可以用ANSYS软件对钢管膨胀混凝土轴向极限承载力进行数值模拟。

In this paper, ANSYS software was used to analyze the ultimateaxial bearing capacityat the age of 60 days of expansive concrete filled steel tube withcontent of expansive agent was 6%, 8%, 10%, 12% and 20%, respectively.The finite element analysis results and experimental results were compared with each other. The results show that the ultimate axial bearing capacity of concrete filled steel tube increases first and then decreases with the addition of expansive agent content, which reaches to maximum when expansive agent content is 12%, and has been improved 9.4%compared with the ultimate axial bearing capacity of ordinary concrete filled steel tube. The finite element analysis results are higher than the experimental results, but both of them are in good agreement. Therefore, ANSYS software can be used to simulate the ultimate axial bearing capacity of expansive concrete filled steel tube.