中文摘要：

基于圆钢管粉煤灰混凝土短柱的轴压试验结果，经过回归分析和反复试算，提出了一种适用于有限元法分析的约束粉煤灰混凝土本构关系模型，并通过有限元法分析验证了其有效性。结果表明，所提出的模型不仅适用于圆钢管粉煤灰混凝土的有限元法分析，而且对普通圆钢管混凝土也具有较好的模拟效果．

英文摘要：

Based on the experimental study on the circular fly ash concrete filled steel tubular stub columns, a constitutive relation model of confined fly ash concrete for finite element analysis is proposed by regres- sion analysis and repeated calculations. The validity of the constitutive relation model is verified through the finite element method analysis. The constitutive relation model is suitable not only for the numerical analysis of fly ash concrete filled steel tubes, but also for that of ordinary concrete filled steel tubes. The research is helpful for the numerical simulation of fly ash concrete filled steel tubes.