多孔介质岩土材料的Biot固结损伤有限元分析

Biot's consolidation damage finite element analysis of porous geo-materials

从损伤力学的角度,引入孔隙介质基本方程,对传统的Darcy定律进行修正,并提出了孔隙介质完备有效的Darcy定律。然后对传统的Biot固结理论进行改进并据此编制相应的岩土体流固耦合损伤有限元程序。最后结合某软土路基简化有限元模型的算例进行分析,同时利用编制的损伤有限元程序对不同时间差分格式在损伤固结有限元分析中预测路基工作性状方面的影响进行了讨论。

From the view point of continuum damage mechanics,the governing equations of porous media were introduced to modify the traditional Dacy s law and the effective Darcy s criterion of complete crack media was presented.On this basis,a corresponding program for FEM computation of fluid-solid coupling damage was developed.The method was applied to analyze a roadbed foundation.The effect of time difference schemes in damage consolidation FEM on predicting the properties of roadbed foundation was discussed.