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Coupled Thermo-Hydro-Mechanical Dynamic Response of Saturated Porous Foundation under Normal Load

DOI：

 作者 单位 E-mail 熊春宝 天津大学 xiongchunbao1964@163.com 郭颖 天津大学 gytha_ying@tju.edu.cn 刁钰 天津大学 李志 天津大学

This work concerns the problems associated with a poroelastic half-space soil medium subject to normal force within the context of generalized thermoelastic theory with one relaxation time. By remaining faithful to Biot's theory of dynamic poroelasticity, we idealize the foundation material as a uniform, fully saturated, poroelastic half-space medium. The governing equations of thermo-hydro-mechanical dynamic model (THMD) are 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.

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。该文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。
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