荷载作用下多孔饱和地基的热-水-力耦合动力响应分析  

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

作　　者：熊春宝[1] 郭颖 刁钰[1] 李志[1] XIONG Chun-bao;GUO Ying;DIAO Yu;LI Zhi(School of Civil Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《计算力学学报》2018年第6期795-801,共7页Chinese Journal of Computational Mechanics

摘　　要：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。最终给出了无量纲的竖向位移、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.

关 键 词：广义热弹性理论 热松弛时间 热-水-力耦合模型 热弹性耦合模型 多孔弹性体 正则模态法 

分 类 号：TU435[建筑科学—岩土工程] O343.6[建筑科学—土工工程]