考虑热-水-力耦合效应多孔弹性地基的动力响应

通过对Biot波动方程的修正,得到考虑热-水-力学耦合效应的多孔弹性介质动力响应的控制方程,研究了简谐均布荷载作用下地基土体的热-水-力耦合动力响应问题。利用Fourier变换技术,得到地基中的应力、位移和孔隙水压力积分形式的解答。利用Fourier逆变换得到数值结果,分析了热-水-力学耦合条件下地基土体中温度增量、应力、位移和孔隙水压力响应的分布,并讨论了热源输入的影响,结果表明：应力、位移和孔隙水压力随？T的增大而有一定的减小。

coupling thermo-hydro-mechanical dynamic response of a porous elastic medium

The dynamic response of porous elastic medium due to a harmonic load, is investigated theoretically by developing the coupling thermo-hydro-mechanical governing equations. The material of foundation, obeying Biot’s dynamic poroelastic theory, is idealized as a uniform, fully saturated poroelastic half-space stratum. The analytical solutions of stress, displacement and pore pressure are derived using the Fourier transform and Fourier inverse transform. Numerical results are obtained and used to analyze the distribution of temperature increment, stress, displacement and pore pressure under the condition of thermo-hydro-mechanical coupling. Furthermore, the influence of heat source acted on the surface of foundation on dynamic response is discussed. The stress, displacement and pore pressure is slightly decreased with the increase of temperature increment .