钢管混凝土短柱轴压力学性能分析及其数值模拟

发布时间：2018-07-16 18:39

【摘要】：钢管混凝土短柱是研究钢管混凝土最基本的构件,研究钢管混凝土短柱有助于了解钢管混凝土的力学性能,为研究其他构件提供了一个基础。对钢管混凝土短柱的力学性能进行了分析,归纳总结了短住轴压承载力理论计算公式,并采用有限元软件ABAQUS对不同壁厚钢管混凝土短柱进行轴心受压模拟。总结得出,随着壁厚的增加,钢管混凝土短柱的极限承载能力逐步提高,二者之间符合线性关系。将数值模拟软件计算求得不同壁厚短柱极限承载力与理论公式计算得出的值做出对比分析,校核发现两者较为接近,说明数值模拟计算效果良好。最后,总结分析位移荷载曲线,提出钢管混凝土短柱塑性破坏角概念。随着钢管壁厚的增加,短柱塑性变形能力提高,塑性破坏角变大,当壁厚达到11.185 1 mm时,短柱发生理想塑性变形。
[Abstract]:Concrete-filled steel tubular (CFST) short columns are the most basic members of concrete-filled steel tubular (CFST) research. The study of CFST short columns is helpful to understand the mechanical properties of CFST and provides a foundation for the study of other members. The mechanical properties of concrete filled steel tubular (CFST) short columns are analyzed, and the theoretical formulas for calculating the bearing capacity of short concrete filled steel tubular columns under axial compression are summarized. The finite element software Abaqus is used to simulate the axial compression of concrete filled steel tubular short columns with different wall thickness. It is concluded that with the increase of wall thickness, the ultimate bearing capacity of concrete filled steel tubular short columns increases gradually, and the relationship between them accords with the linear relationship. The numerical simulation software is used to calculate the ultimate bearing capacity of short columns with different wall thickness and the calculated values of the theoretical formula are compared and analyzed. The results show that the two values are close to each other, which shows that the numerical simulation results are good. Finally, the concept of plastic failure angle of concrete filled steel tubular short column is put forward by summarizing and analyzing the displacement load curve. With the increase of the wall thickness of the steel pipe, the plastic deformation ability of the short column increases, and the plastic failure angle increases. When the wall thickness reaches 11.185 mm, the short column produces ideal plastic deformation.
【作者单位】：中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家自然科学基金(41672347) 北京市自然科学基金(8142032) 教育部博士点基金(20130023110021)资助
【分类号】：TU398.9

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