圆中空夹层钢管混凝土柱的受箍作用分析

根据经过前人通过大量实验验证过的结论，提出一些合理的假设，在此基础之上，利用修正弹性模量的方法来计入圆中空夹层钢管混凝土轴压构件承载力的提高，并用能量法和最小势能原理从中导出在轴向压力作用下的圆中空夹层钢管混凝土中核心混凝土的修正弹性模量．结果表明，修正弹性模量不但与核心混凝土的泊松比，截面半径及弹性模量有关，还与内外钢管的半径，内外钢管的厚度及弹性模量有关．

The analysis of the hoop mechanism of concrete-filled double skin steel tubular columns with circular sections

Based on some conclusions, which have been testified through a lot of experiments done previously, the paper shows some rational hypothesis. From that, the paper indicates that how much the axial bearing is improved in the concrete-filled double skin steel tubular columns with circular section can be calculated by modifying the elastic modulus, and the modified elastic modulus can be deduce by using minimum potential energy principle. The result shows that the modified elastic modulus of concrete-filled double skin steel tubular columns with circular section is influenced by the Poisson ratio, the size of the section, the model and elastic modulus of the core concrete, as well as the radius and the thickness of the outer and inner tube.