考虑孔隙比变化的粘弹性土体本构模型

CONSTITUTIVE RELATIONSHIP OF VISCOELASTIC SOIL IN CONSIDERATION OF VOID RATIO

在Kelvin-Voigt模型的基础上建立了考虑土体孔隙比的非线性本构关系，并给出了计算方法。计算表明，考虑结构性（孔隙比）因素后，初始孔隙比对应变-时间关系曲线存在影响；在处理岩土力学问题上，本文提出以多孔介质观点代替经典的连续介质观点，并做了初步的探讨。结果表明，经典的Kelvin－Voigt模型是本文所给多孔介质模型的极限情况。

Considering the function of void ratio, nonlinear constitutive relationship of soil is set up based on the Kevin-Voigt medelvith calculation method given. Calculation indicates that the initial void ratio has significant influence on the relationship be-tween strain and time when this structural property is taken into account. To solve the problem of rock or soil mechanics, thepoint of view of porous media is more reasonable than that of continuum media, an initial study of this standpoint is given.The meults point that classical model of Kelvin-Voigt is a limit case of porous media in this paper. The esults of thepaper could be applied in calculating strain of rock or soil, especially in settlement of soft ground.