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Scattering of plane waves by a 3D canyon in a transversely isotropic fluid-saturated layered half-space
https://orcid.org/0000-0002-2506-9771
Abstract Scattering of plane waves by a three-dimensional (3D) irregularity in a transversely isotropic (TI) fluid-saturated layered half-space is investigated for the first time. The derived exact stiffness matrix is applied to solve the dynamic response of free fields. The scattered fields, which arise from the presence of canyon irregularity, are described by applying dynamic Green's functions for uniformly distributed loads and pore pressure acting on an inclined plane, that is, the special indirect boundary element method (IBEM). The accuracy of the proposed method is verified via the comparison between the calculated results and those of published literature. By taking a semi-spherical canyon cut in a homogeneous, single-layered, and three-layered TI saturated half-space as examples, the influences of material anisotropy, boundary drainage condition, and sedimentary sequence on dynamic response are investigated. The results show that the material anisotropy and boundary drainage conditions all have a significant impact on the seismic responses, which is highly dependent on the waves type, incident angle, and frequency. For the layered medium, the displacement amplification is affected by the soil layer properties and sedimentary sequence.
Highlight Scattering of plane waves by a 3D canyon in a TI fluid-saturated layered half-space is studied. Dynamic Green's functions for uniformly distributed loads and pore acting on an inclined plane are derived. The proposed method has the merits of high precision and none of the problem of singularity. The ground motion considering material anisotropy, boundary drainage condition, and sedimentary sequence is investigated.
Scattering of plane waves by a 3D canyon in a transversely isotropic fluid-saturated layered half-space
https://orcid.org/0000-0002-2506-9771
Abstract Scattering of plane waves by a three-dimensional (3D) irregularity in a transversely isotropic (TI) fluid-saturated layered half-space is investigated for the first time. The derived exact stiffness matrix is applied to solve the dynamic response of free fields. The scattered fields, which arise from the presence of canyon irregularity, are described by applying dynamic Green's functions for uniformly distributed loads and pore pressure acting on an inclined plane, that is, the special indirect boundary element method (IBEM). The accuracy of the proposed method is verified via the comparison between the calculated results and those of published literature. By taking a semi-spherical canyon cut in a homogeneous, single-layered, and three-layered TI saturated half-space as examples, the influences of material anisotropy, boundary drainage condition, and sedimentary sequence on dynamic response are investigated. The results show that the material anisotropy and boundary drainage conditions all have a significant impact on the seismic responses, which is highly dependent on the waves type, incident angle, and frequency. For the layered medium, the displacement amplification is affected by the soil layer properties and sedimentary sequence.
Highlight Scattering of plane waves by a 3D canyon in a TI fluid-saturated layered half-space is studied. Dynamic Green's functions for uniformly distributed loads and pore acting on an inclined plane are derived. The proposed method has the merits of high precision and none of the problem of singularity. The ground motion considering material anisotropy, boundary drainage condition, and sedimentary sequence is investigated.
Scattering of plane waves by a 3D canyon in a transversely isotropic fluid-saturated layered half-space
https://orcid.org/0000-0002-2506-9771
Abstract Scattering of plane waves by a three-dimensional (3D) irregularity in a transversely isotropic (TI) fluid-saturated layered half-space is investigated for the first time. The derived exact stiffness matrix is applied to solve the dynamic response of free fields. The scattered fields, which arise from the presence of canyon irregularity, are described by applying dynamic Green's functions for uniformly distributed loads and pore pressure acting on an inclined plane, that is, the special indirect boundary element method (IBEM). The accuracy of the proposed method is verified via the comparison between the calculated results and those of published literature. By taking a semi-spherical canyon cut in a homogeneous, single-layered, and three-layered TI saturated half-space as examples, the influences of material anisotropy, boundary drainage condition, and sedimentary sequence on dynamic response are investigated. The results show that the material anisotropy and boundary drainage conditions all have a significant impact on the seismic responses, which is highly dependent on the waves type, incident angle, and frequency. For the layered medium, the displacement amplification is affected by the soil layer properties and sedimentary sequence.
Highlight Scattering of plane waves by a 3D canyon in a TI fluid-saturated layered half-space is studied. Dynamic Green's functions for uniformly distributed loads and pore acting on an inclined plane are derived. The proposed method has the merits of high precision and none of the problem of singularity. The ground motion considering material anisotropy, boundary drainage condition, and sedimentary sequence is investigated.
Scattering of plane waves by a 3D canyon in a transversely isotropic fluid-saturated layered half-space
Liang, Jianwen (author) / Wang, Yongguang (author) / Ba, Zhenning (author) / Zhong, Hao (author)
2021-09-17
Article (Journal)
Electronic Resource
English
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