摘要
基于饱和多孔介质热-水-力完全耦合的控制方程,通过有限Fourier变换及其逆变换,对一维热弹性固结模型进行解析求解,给出土柱内部温度、孔压和位移演化过程的解析表达式。在定义了热固结时间因素和热固结系数等概念的基础上,对非等温条件下饱和土体的热固结特性及其机理进行研究,讨论了土的热固结系数与热扩散系数之比、不同的外力荷载和温度荷载组合等因素对热体积膨胀效应与热固结效应两者耦合作用的影响。此外,还分析了土体热膨胀或收缩对温度演化过程的耦合影响。
Based on a fully coupled thermal-hydraulic-mechanical formulation of saturated porous media, the analytical solutions of a one-dimensional thermal elastic consolidation model under non-isothermal condition are deduced by finite Fourier transform and its inverse transform. The analytical expressions of temperature, pore pressure and displacement are derived. For convenience of analyses, the concepts of thermal consolidation time factor and coefficient of thermal consolidation are defined. The thermal consolidation characteristics and its mechanism are studied. The effects of ratio of thermal consolidation coefficient to thermal diffusivity, and various combinations of external load and temperature are analyzed. Besides, the coupling effects of thermal expansion or contraction of soil on temperature evolution are also discussed.
出处
《工程力学》
EI
CSCD
北大核心
2005年第5期186-191,共6页
Engineering Mechanics
基金
北京交通大学科技基金(2004SM037)
关键词
岩土工程
饱和多孔介质
热弹性
热固结
有限Fourier变换
geotechnical engineering
saturated porous media
thermal elasticity
thermal consolidation
finite Fourier transform
