根据长期单向压缩试验结果确定三维流变模型参数

Determination of three-dimensional rheologic parameters based on long term oedometer test

将一维西原模型的应力–应变关系推广为三维应力状态的弹-粘弹-粘塑本构方程,以其竖向应变表达式作为基本方程,对长期单向压缩试验结果进行曲线拟合,从而确定该流变模型的本构参数。该方法简便快捷,所获参数物理意义明确,可推广应用于其它流变模型的参数确定。

The stress-strain relationship of the one-dimensional Xiyuan Model was developed into three-dimensionai stress state, The visco-elastic plastic constitutive equation was applied in the model and its vertical strain expression was regarded as the fundamental equation to simulate the test data of the long term oedometer test to get the parameters of the rheologicai model, This method was very convenient and the physical meaning of the parameters obtained was clear. And the method could also be applied to determine the parameters of other rbeological model.