Normal Mode Analysis to a Poroelastic Half-Space Problem under Generalized Thermoelasticity

Abstract

THE THERMO-HYDRO-MECHANICAL PROBLEMS ASSOCIATED WITH A POROELASTIC HALF-SPACE SOIL MEDIUM WITH VARIABLE PROPERTIES UNDER GENERALIZED THERMOELASTICITY THEORY WERE INVESTIGATED IN THIS STUDY. BY REMAINING FAITHFUL TO BIOT’S THEORY OF DYNAMIC POROELASTICITY, WE IDEALIZED THE FOUNDATION MATERIAL AS A UNIFORM, FULLY SATURATED, POROELASTIC HALF-SPACE MEDIUM. WE FIRST SUBJECTED THIS MEDIUM TO TIME HARMONIC LOADS CONSISTING OF BOTH NORMAL AND THERMAL LOADS, THEN INVESTIGATED THE DIFFERENCES BETWEEN THE COUPLED THERMOHYDRO-MECHANICAL DYNAMIC MODELS AND THE THERMO-ELASTIC DYNAMIC MODELS. WE USED NORMAL MODE ANALYSIS TO SOLVE THE RESULTING NON-DIMENSIONAL COUPLED EQUATIONS, THEN INVESTIGATED THE EFFECTS THAT TEMPERATURE DISTRIBUTION, VERTICAL DISPLACEMENT, VERTICAL STRESS, AND EXCESS PORE WATER PRESSURE EXERTED ON THE POROELASTIC HALF-SPACE MEDIUM AND REPRESENTED THEM GRAPHICALLY.