基于热力学基础上的非饱和砂土本构模型-理论研究  

THERMODYNAMICS BASED CONSTITUTIVE MODEL FOR UNSATURATED SANDS

作　　者：张卫华[1,2] 赵成刚[1] 郜新军[3] 董晓丽[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京城市学院城建学部,北京100083 [3]郑州大学土木工程学院,郑州450001

出　　处：《工程地质学报》2014年第6期1094-1101,共8页Journal of Engineering Geology

基　　金：国家自然科学基金(50906020)资助

摘　　要：热力学是一种普适理论,因此非饱和砂土的变化过程必然也遵循热力学原理。利用热力学原理可以从更普遍的情况(条件)和更一般的视角审视非饱和土的水力-力学性质。本文基于热力学理论并考虑砂土的剪胀-各向异性以及塑性耗散之间的关系,建立固-液两相耦合的非饱和砂土本构模型的理论框架,更深入地揭示非饱和砂土复杂的行为和性质。The mechanical behavior of unsaturated sands inevitably follows the principles of thermodynamics.By this method,we can study the hydraulic-mechanical behavior of soils with a general insight under a more universal law.Based on thermodynamical theory,and considering the relations among dilatancy,anisotropy and plastic dissipation of sands,a solid-liquid coupled constitutive modeling framework is established which can deeply indicate many complex behavior and properties for unsaturated sands.

关 键 词：非饱和砂土 热力学 剪胀 耗散函数 

分 类 号：TU47[建筑科学—结构工程]