Transient Dynamic Analysis of Gradient-Saturated Viscoelastic Porous Media

Zhou, Fengxi

doi:10.1061/(asce)em.1943-7889.0000706

Cited by 5 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on this theory, the complex dispersion equation for Love waves is derived for transversely isotropic fluid-saturated porous media with exponential and linear variation of shear modulus [23][24]. The dispersion behaviour of plane wave [25], Rayleigh wave [26] and transient response of viscoelastic porous medium [27], are analysed in the inhomogeneous saturated soil with gradient variation of mechanical properties along the depth. However, it should be noted that none of these studies examine the problem of amplification of the porous soil response.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profile

Ouzandja¹,

Hadid²

2020

JCE

View full text Add to dashboard Cite

Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profileThe influence of local geotechnical site conditions on the soil profile amplification is analysed in this paper by assuming that the incoming seismic waves consist of inclined P-SV waves. The inhomogeneous soil profile is idealized as a multi-layered saturated poroviscoelastic medium and characterized by the Biot's theory with a shear modulus varying continuously in depth according to the Wichtmann's model. The results are presented in terms of horizontal and vertical soil profile amplification with linear and nonlinear soil behaviour, for different values of incidence angle, pore-water saturation, porosity, permeability, coefficient of uniformity, and non-cohesive fines content.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profile

Ouzandja¹,

Hadid²

2020

JCE

View full text Add to dashboard Cite

show abstract

“…Analytical methods are usually based on the wave function expansion . Numerical methods include the finite element method, the finite difference method, spectral element method, boundary element method (BEM), discrete wave number method, and other boundary types or hybrid methods . The literature reviews summarized more studies in this field.…”

Section: Introductionmentioning

confidence: 99%

A fast multipole accelerated indirect boundary element method for broadband scattering of elastic waves in a fluid‐saturated poroelastic domain

Liu

Sun

Cheng

et al. 2018

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

Summary A fast multipole accelerated indirect boundary element method is developed to efficiently solve the scattering of broadband waves by inhomogeneity in a fluid‐saturated 3D poroelastic space. Based on the single layer potential theory, poroelastic free‐space Green's functions of point force and fluid source are distributed on the scatterer surface at fictitious densities to construct the scattered waves. By using the plane wave expansion of 3D potential functions of compressional and shear waves, the multipole expansion and the local expansion coefficients are derived. Numerical results demonstrated that this proposed method can greatly improve the efficiency of traditional indirect boundary element method and reduce the memory requirement for 3D broadband wave scattering problems in an unbounded poroelastic medium. Problems of wave scattering by a spherical cavity, a group of cavities, and a canyon in a semiinfinite poroelastic space are investigated. Several notable scattering characteristics are revealed.

show abstract

“…In reality, the soil is a porous medium and often saturated with fluid, especially in coastal areas; however, because of the substantial computational effort required to obtain the seismic behavior of inhomogeneous saturated poroviscoelastic soil profile, very few studies applying Biot’s theory (Biot 1956a, 1956b, 1962) can be found; Ke et al (2005, 2006) assumed an exponential and linear variations of the shear modulus and derived the complex dispersion equation of Love waves in transversely isotropic fluid saturated porous media. Moreover, the dispersion behavior of plane wave (Zhou et al , 2013) and Rayleigh wave (Zhou and Ma, 2016) and the transient response (Zhou, 2013) are analyzed in inhomogeneous saturated soil with gradient variation of mechanical properties with depth; it should be noted that the formulas proposed to describe the inhomogeneous shear modulus of saturated porous soil profile are not realistic models and don’t take into account the geotechnical soil properties, which can change the free-field ground motion.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of geotechnical site conditions effect on the seismic response of a saturated inhomogeneous poroviscoelastic soil profile

Ouzandja

Hadid

2018

WJE

View full text Add to dashboard Cite

Purpose This paper aims to present the investigation of the linear and nonlinear seismic site response of a saturated inhomogeneous poroviscoelastic soil profile for different soil properties, such as pore-water saturation, non-cohesive fines content FC, permeability k, porosity n and coefficient of uniformity Cu. Design/methodology/approach The inhomogeneous soil profile is idealized as a multi-layered saturated poroviscoelastic medium and is characterized by the Biot’s theory, with a shear modulus varying continuously with depth according to the Wichtmann’s model. Seismic response analysis has been evaluated through a computational model, which is based on the exact stiffness matrix method formulated in the frequency domain assuming that the incoming seismic waves consist of inclined P-SV waves. Findings Unlike the horizontal seismic response, the results indicate that the vertical one is strongly affected by the pore water saturation. Moreover, in the case of fully saturated soil profile, the same vertical response spectra are found for the two cases of soil behavior, linear and nonlinear. Originality/value This research is a detailed study of the geotechnical soil properties effect on the bi-directional seismic response of saturated inhomogeneous poroviscoelastic soil profile, which has not been treated before; the results are presented in terms of the peak acceleration ratio, as well as the free-field response spectra and the spectral ratio (V/H).

show abstract

Transient Dynamic Analysis of Gradient-Saturated Viscoelastic Porous Media

Cited by 5 publications

References 25 publications

Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profile

Influence of soil properties on amplification of saturated inhomogeneous poroviscoelastic soil profile

A fast multipole accelerated indirect boundary element method for broadband scattering of elastic waves in a fluid‐saturated poroelastic domain

Sensitivity analysis of geotechnical site conditions effect on the seismic response of a saturated inhomogeneous poroviscoelastic soil profile

Contact Info

Product

Resources

About