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本文研究粉煤灰在不同等应力增量比路径下的应力－应变－体变特性，提出考虑土的应变软化、剪胀（剪缩）性和应力路径影响的非线性弹性模型．通过与试验及有限元计算成果对比，验证了模型的适用性．
In this paper, the stress-strain-strain behavior of fly-ash under different ratios of equal stress increment is studied. A nonlinear elastic model considering soil softening, dilatancy and stress path is proposed. The applicability of the model is verified through comparison with the experimental results and the finite element method.