多室式钢管混凝土T形偏压短柱性能分析

采用ABAQUS软件,建立了多室式钢管混凝土T形短柱的有限元模型。对3个轴压短柱试件进行了模拟分析,得出荷载-位移曲线,并将计算结果与试验结果进行了对比。在此基础上对多室式钢管混凝土T形短柱的偏压性能进行了大量数值模拟计算,得出了其N/Nu-M/Mu相关曲线,分析了各参数对其N/Nu-M/Mu相关曲线的影响。参考矩形钢管混凝土柱承载力的计算理论和方法,在分析计算数据的基础上,建立了多室式钢管混凝土T形短柱偏压承载力的简化计算公式。分析结果表明,所提出的偏压强度承载力计算公式与数值模拟结果符合良好,可供工程设计参考。

Performance analysis on multi-cell T-shaped concrete filled steel tubular short cloumn under eccentric compression

In this paper,the finite element modes of multi-cell T-shaped concrete filled steel tubular short column were established by using software ABAQUS. Three axial compression short column specimens were analyzed, and the calculated force-displacement curve were compared with experimental results. On the basis of investigation above, a large number of numerical analyses on multi-cell T- shaped concrete filled steel tubular short column under eccentric compression were proceed, and NINe, - M/M,, curves were obtained. The effects of various factors on the N/Nu - M/Mu curves were analyzed. With reference to the calculating theory and method of rectangular concrete filled steel tubular column bearing capacity, the simplified formulas for bearing capacity of multi-cell T-shaped concrete filled steel tubular short column under eccentric compression were recommended. Analysis results show that the calculation results from the proposed formulas agree well with the finite element analysis results. The formulas are valuable to the engineering design.