Attenuation characteristics of thermoelastic waves in unsaturated soil

Liu, Hongbo; Jiang, Mingjing; Zhou, Fengxi; Lu, Guoqiang

doi:10.1007/s12517-021-08261-2

Cited by 9 publications

(8 citation statements)

References 47 publications

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“…Compared with the fully saturated soil or the single phase soil, the existence of matric suction leads to the both increase of the effective stress between particles and the overall shear modulus of the unsaturated soil 1,2 . The relation between the matric suction and the saturated degree is commonly described by the soil‐water characteristic curve (SWCC), which is also used to describe the hydraulic conductivity of the partially saturated porous medium 3 . Genuchten 35 presented an empirical formula form for SWCC models based on many numerous experiments.…”

Section: Free Field Response Of Unsaturated Soil Subjected To Rayleig...mentioning

confidence: 99%

“…There are three modal Rayleigh waves (i.e., R1, R2 and R3 waves) corresponding respectively to compression waves (i.e., P1, P2 and P3 waves) in the vibration process of unsaturated soil 3,4 . However, in practical engineering applications, the effect of various Rayleigh waves on the dynamic response of soil layer are usually considered according to the superposition method 5 .…”

Section: Free Field Response Of Unsaturated Soil Subjected To Rayleig...mentioning

confidence: 99%

“…Based on the frame of elastic theory, Lo 1 developed a set of dynamic governing equations to model the propagation characteristics of bulk wave propagation in an unsaturated poroelastic medium. Subsequently, Chen et al., 2 Liu et al 3 . and Zhou et al 7 .…”

Section: Introductionmentioning

confidence: 99%

“…As body waves radiate from seismic source to surroundings inside the earth, pressure and shear waves often interfere on the surface of the earth, resulting in uneven surface waves 1,2 . The generated surface waves can be further divided into Rayleigh waves, Love waves and Stoneley waves, among which Rayleigh waves is widely concerned by scholars for it accounts for 67.3% of total input energy 3,4 . Different from the formation mechanism of pressure waves and shear waves, Rayleigh waves is more easy to be generated in construction sites, expressways, machine operation sites and other places 5 .…”

Section: Introductionmentioning

confidence: 99%

“…1,2 The generated surface waves can be further divided into Rayleigh waves, Love waves and Stoneley waves, among which Rayleigh waves is widely concerned by scholars for it accounts for 67.3% of total input energy. 3,4 Different from the formation mechanism of pressure waves and shear waves, Rayleigh waves is more easy to be generated in construction sites, expressways, machine operation sites and other places. 5 Thus, many researchers have tried to use the propagation characteristics of Rayleigh waves to detect foundation integrity and inverse geotechnical parameters.…”

Section: Introductionmentioning

confidence: 99%

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Flexible support of a pile embedded in unsaturated soil under Rayleigh waves

Yang

Líu

et al. 2022

Earthq Engng Struct Dyn

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Under the action of Rayleigh waves, pile head is easy to rotate with a concrete pile cap, and pure fixed-head condition is rarely achieved, which is a common phenomenon for it usually occurs on the precast piles with insufficient anchorage. In addition, the propagation characteristics of Rayleigh wave have been changed significantly due to the existence of capillary pressure and the coupling between phases in unsaturated soil, which significantly affects the pile-soil interaction. In order to study the above problems, a coupled vibration model of unsaturated soil-pile system subjected to Rayleigh waves is established on the basis that the pile cap is equivalent to a rigid mass block. Meanwhile, the soil constitution is simplified to linear-elastic and small deformations are assumed to occur during the vibration phase of soil-pile system. Then, the horizontal dynamic response of a homogeneous free-field unsaturated soil caused by propagating Rayleigh waves is obtained by using operator decomposition theory and variable separation method. The dynamic equilibrium equation of a pile is established by using the dynamic Winkler model and the Timoshenko beam theory, and the analytical solutions of the horizontal displacement, rotation angle, bending moment and shear force of pile body are derived according to the boundary conditions of flexible constraint of pile top. Based on the present solutions, the rationality of the proposed model is verified by comparing with the previous research results. Through parametric study, the influence of rotational stiffness and yield bending moment of pile top on the horizontal dynamic characteristics of Rayleigh waves induced pile is investigated in detailed. The analysis results can be utilized for the seismic design of pile foundation under Rayleigh waves.

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Section: Free Field Response Of Unsaturated Soil Subjected To Rayleig...mentioning

confidence: 99%

Section: Free Field Response Of Unsaturated Soil Subjected To Rayleig...mentioning

confidence: 99%