Dynamic Response of Two-Dimensional Double-Layered Unsaturated Soil Foundations Under a Strip Load

Ma, Qin; Shi, Liwei

doi:10.1007/s42417-022-00439-6

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…The found fundamental solutions have the property of the stress absence on the top surface 𝑥 = 𝑥 𝑁 . This excludes unknown displacements on the given part of the region 𝐷 boundary from representations (1).…”

Section: Methodsmentioning

confidence: 99%

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Multilayer medium behavior simulation in the presence of delamination defects

Lyapin,

Glushko

2023

E3S Web of Conf.

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The article is devoted to the study of the steady harmonic oscillation excitation processes by a surface source in a multilayer linearly elastic layered half-plane with an internal defect. The application of the work results is associated with the design and assessment of the multilayer structures state, such as geological structures, non-rigid pavements, layered composites. The study is based on the use of the boundary element method and the construction of boundary equations with respect to displacements at the defect boundary. Using the integral Fourier transform, fundamental solutions for a multilayer half-plane satisfying the stress-free conditions at the upper boundary of the domain are constructed. A feature of the construction is the good computational ability of the proposed algorithm with a large number of layers. The basic one is the construction of a solution for a homogeneous half-plane. This allows you to implement parallel computing. In the numerical implementation, a spline approximation of the defect boundary is used. Linear boundary elements are applied. As an example, a comparative analysis of the amplitude-frequency characteristics on the surface of the half-plane is given for cases of a limited defect, its absence and contact of layers without friction on the entire boundary. This allows us to draw conclusions about the possibility of identifying internal damage at the boundaries of layers by monitoring the wave field on the surface of a multilayer structure.

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Section: Methodsmentioning

confidence: 99%

“…The widespread use of multilayer structures under dynamic loads causes the interest of researchers in the study of wave excitation and propagation processes, the assessment of the multilayer media spectral properties, the interaction of surface and buried objects with layered structures [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Multilayer medium behavior simulation in the presence of delamination defects

Lyapin,

Glushko

2023

E3S Web of Conf.

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“…To facilitate the study of the effect of load movement velocity on the dynamic response of layered saturated frozen soil foundation, the dimensionless velocity N 0 =c/c s is defined by referring to the treatment of velocity by Ma et al ( 2023a ), where c s is the shear wave velocity of surface soil and c is the load moving speed. When the shear modulus of surface soil is 6.85GPa, c s =1280m/s can be obtained according to Reference (Ma et al, 2023b).…”

Section: Influence Of Load Moving Speedmentioning

confidence: 99%

“…Tang et al, (2020) investigated the dynamic response of the coupled system of pavement and unsaturated soil foundation under traffic load. Ma et al (2023a) explored the influence of surface soil softness and stiffness on the dynamic response of layered unsaturated foundations under moving loads using the transfer and reflection matrix method and found that the arrangement order of the soil layers had a notable impact on the surface displacement.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response analysis of layered saturated frozen soil foundation subjected to moving loads

Chen,

2024

Lat. Am. j. solids struct.

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Based on the theory of solid porous media with pores, the dynamic response of layered saturated frozen soil under uniform moving load is studied. Firstly, the governing equation of saturated frozen soil is established. Then, the Fourier integral transform is used to decouple the governing equation of saturated frozen soil, and the general solution of the potential function is obtained, and the corresponding force and displacement of each layer of saturated frozen soil are derived. Finally, using the transfer matrix method, combined with the continuous condition, the semi-analytical solution of the layered saturated frozen soil medium in the frequency domain under the surface permeable condition is derived. After verifying the accuracy of the solution by comparing the model degradation with the existing literature, the effects of soil shear modulus, load moving speed, temperature, contact parameter and frequency on the dynamic response are analyzed in detail. The results show that the order of soft and hard soil layers is of great significance to accurately evaluate the dynamic response of saturated frozen soil.

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“…Assuming piles as Timoshenko beams, Zhang et al [16] derived the resistance and attenuation functions about the displacements of unsaturated soils. In order to isolate P waves and S waves, Ma et al [17,18] investigated the vibration reduction performance of single-, double-and multi-layer wave impeding block and concluded that the wave impedance ratio and saturation have a great influence on the vibration isolation. However, with the increase in the number of wave barriers, the scattering of waves on different materials becomes more complex, making such problems challenging.…”

Section: Introductionmentioning

confidence: 99%

Broadband surface wave manipulation by periodic barriers in unsaturated soil

Wu,

Shi

2024

Phil. Trans. R. Soc. A.

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Periodic wave barriers have been widely used to manipulate elastic waves propagating in saturated and single-phase soil due to their attenuation zone properties. However, it is difficult to promote application of periodic barriers in unsaturated soils due to their complex constitutive relationship. In this study, manipulation of surface waves by periodic in-filled trench barriers in unsaturated soil has been studied based on the periodic theory. The dispersion relations of a periodic structure for surface waves in unsaturated soil are determined. The attenuation mechanism of evanescent surface waves is revealed. Next, the effects of several key parameters of unsaturated soil on the attenuation zones of the periodic in-filled trench barriers are comprehensively discussed. It is found that in a particular range for material parameter, the surface waves are attenuated over the entire frequency range due to the viscosity of fluid. Finally, a periodic in-filled trench barrier is designed according to a field test of ground vibration induced by a train, and its performances in mitigating surface waves propagating in unsaturated and saturated soils are conducted and compared by conducting analysis in time domain. This investigation provides a new insight for manipulating surface waves by periodic barriers. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Dynamic Response of Two-Dimensional Double-Layered Unsaturated Soil Foundations Under a Strip Load

Cited by 9 publications

References 24 publications

Multilayer medium behavior simulation in the presence of delamination defects

Multilayer medium behavior simulation in the presence of delamination defects

Dynamic response analysis of layered saturated frozen soil foundation subjected to moving loads

Broadband surface wave manipulation by periodic barriers in unsaturated soil

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