The input work expression and the thermodynamics-based modelling framework for unsaturated expansive soils with double porosity  

作　　者：LI Jian ZHAO ChengGang CAI GuoQing ASREAZAD Saman XU Xi Frank HUANG QiDi 

机构地区：[1]School of Civil Engineering, Beijing Jiaotong University [2]ARC Centre of Encellence for Geotechnical Science and Engineering, The University of Newcastle

出　　处：《Chinese Science Bulletin》2013年第27期3422-3429,共8页

基　　金：supported by the National Natural Science Foundation ofChina (51278047);the National Basic Research Program of China (2010CB-732100);Beijing Municipal Natural Science Foundation (8112024)

摘　　要：In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of microand macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity.In this paper, based on the porous media theory, the specific expressions of the total stress and the input work of unsaturated expansive soils with double porosity are proposed, and then the energy-conjugate variables are further derived. We make distinctions between the effects of capillary water and adsorbed water on the soil behaviour, as well as between the deformations of microand macrostructure. According to the derived input work expression and the work-energy-dissipation relations for an open multiphase thermodynamic system, we establish a thermodynamics-based modelling framework for unsaturated expansive soils with double porosity.

关 键 词：非饱和膨胀土 热力学系统 输入饱和 双重介质 建模框架 工作表 多孔介质 宏观结构 

分 类 号：TU443[建筑科学—岩土工程]