Applied Mathematics and Mechanics (English Edition) ›› 2017, Vol. 38 ›› Issue (9): 1295-1312.doi: https://doi.org/10.1007/s10483-017-2241-8

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Layer-element analysis of multilayered saturated soils subject to axisymmetric vertical time-harmonic excitation

Zhiyong AI, Lihua WANG   

  1. Department of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, College of Civil Engineering, Tongji University, Shanghai 200092, China
  • 收稿日期:2016-12-29 修回日期:2017-04-06 出版日期:2017-09-01 发布日期:2017-09-01
  • 通讯作者: Zhiyong AI,E-mail:zhiyongai@tongji.edu.cn E-mail:zhiyongai@tongji.edu.cn

Layer-element analysis of multilayered saturated soils subject to axisymmetric vertical time-harmonic excitation

Zhiyong AI, Lihua WANG   

  1. Department of Geotechnical Engineering, Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, College of Civil Engineering, Tongji University, Shanghai 200092, China
  • Received:2016-12-29 Revised:2017-04-06 Online:2017-09-01 Published:2017-09-01
  • Contact: Zhiyong AI E-mail:zhiyongai@tongji.edu.cn

摘要:

The analytical layer-elements for a single poroelastic soil layer and the underlying half-space are established using an algebraic manipulation and Hankel transform. According to the boundary conditions and adjacent continuity conditions of general stresses and displacements, a global matrix equation in the transform domain for multilayered saturated soil media is assembled and solved. Solutions in the frequency domain can be further obtained with an inverse Hankel transform. Numerical examples are used to examine accuracy of the present method and demonstrate effects of soil parameters and load conditions on dynamic responses of the multilayered poroelastic saturated soils.

关键词: nonlinear waves, fKdV equation, surface tension, multilayered saturated soil, analytical layer-element method, steady state dynamic response, axisymmetric vertical excitation

Abstract:

The analytical layer-elements for a single poroelastic soil layer and the underlying half-space are established using an algebraic manipulation and Hankel transform. According to the boundary conditions and adjacent continuity conditions of general stresses and displacements, a global matrix equation in the transform domain for multilayered saturated soil media is assembled and solved. Solutions in the frequency domain can be further obtained with an inverse Hankel transform. Numerical examples are used to examine accuracy of the present method and demonstrate effects of soil parameters and load conditions on dynamic responses of the multilayered poroelastic saturated soils.

Key words: multilayered saturated soil, nonlinear waves, fKdV equation, surface tension, steady state dynamic response, analytical layer-element method, axisymmetric vertical excitation

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