哑铃形截面钢管砼短柱紧箍力有限元分析

Anlysis of bond stress in concrete filled steel tube short column with dumbbell-shaped cross section By Finte Element Method

采用有限元法对哑铃型截面钢管混凝土短柱进行分析,研究了不同混凝土标号和含钢率对其紧箍力的影响以及腹腔部分钢管和混凝土的应力分布等受力特性.结果表明,紧箍力随混凝土标号和含钢率的增大而增大,腹腔内混凝土大部分区域近似处于双向受压应力状态.

In this paper,concrete filled steel tube short column with dumbbellshaped cross section is studied by finite element method,further analysis on the influence of concrete grade and steel ratio on confining force,and stress distribution and other properties of the core concrete in web cavity of the column under load is carried out.The results of studies indicate confining force increases with the increase of concrete grade and steel ratio,and most of the core concrete is approximately under biaxial compression.