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Coupled thermo-hydro-mechanical dynamic response of saturated porous foundation under normal load[J].计算力学学报,2018,35(6):795~801

Coupled thermo-hydro-mechanical dynamic response of saturated porous foundation under normal load
Coupled thermo-hydro-mechanical dynamic response of saturated porous foundation under normal load

DOI：10.7511/jslx20170905003

 作者 单位 E-mail 熊春宝 天津大学 建筑工程学院, 天津 300072 郭颖 天津大学 建筑工程学院, 天津 300072 gytha_ying@tju.edu.cn 刁钰 天津大学 建筑工程学院, 天津 300072 李志 天津大学 建筑工程学院, 天津 300072

基于广义热弹性理论，结合达西定律，对Biot波动方程进行修正，研究了一个受到荷载作用的多孔饱和地基的热-水-力多场耦合动态响应问题。建立了多孔饱和地基在荷载作用下的热-水-力耦合模型及控制方程，该模型可退化为热弹性耦合模型。采用正则模态法求解，得到了问题的解析解，讨论了热-水-力耦合模型和热弹性耦合模型的区别，分析了荷载频率变化对地基中各物理量的影响。最终给出了量纲的竖向位移、超孔隙水压力、竖向应力和温度等物理量的分布规律。

This work concerns the problems associated with a poroelastic half-space soil medium subject to a normal force within the context of generalized thermoelasticity with one relaxation time.By remaining faithful to Biot's theory of dynamic poroelasticity,the foundation material is idealized as a uniform,fully saturated,poroelastic half-space medium.The governing equations of thermo-hydro-mechanical dynamic model (THMD) is established,and this model can reduced into the thermo-elastic dynamic model (TMD).We then deduce the general solutions of non-dimensional vertical displacement,excess pore water pressure,vertical stress,and temperature distribution using normal mode analysis and depict them graphically.Throughout this paper,we discuss the differences between THMD and TMD.