Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (S1): 612-622.doi: 10.16285/j.rsm.2022.0659

• Numerical Analysis • Previous Articles     Next Articles

Energy characteristics of Rayleigh waves propagation in unsaturated soils

ZHOU Feng-xi1, 2, YAO Tao-qi1, LIU Hong-bo3   

  1. 1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 3. School of Civil Engineering, Southeast University, Nanjing, Jiangsu 211189, China
  • Received:2022-05-05 Accepted:2022-10-05 Online:2023-11-16 Published:2023-11-21
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51978320, 11962016) and the Funds for Creative Research Groups of Gansu Province, China (20JR5RA478).

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Abstract: Based on the theory of porous medium and continuum mechanics, the dispersion equation of Rayleigh waves in unsaturated soils are established using the mass balance equations, the momentum balance equations and the effective stress principle. The influence of the saturation on wave velocity, displacement response and energy flow distribution are studied by numerical examples. The results show that the characteristics of Rayleigh waves mainly reflects the characteristics of compressed P1 wave and shear wave, and its velocity, displacement and energy distribution are significantly affected by degree of saturation. The propagation velocity and attenuation of Rayleigh wave are dispersive, and the increase of the saturation in the unsaturated soil will cause a significant decrease of the displacement amplitude, as well as the shear wave component in the Rayleigh waves energy will increase with increasing the saturation.

Key words: unsaturated soil, Rayleigh wave, wave velocity, attenuation coefficient, energy distribution

CLC Number: 

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