Study of irregular behavior of shear waves in layered soil using matrix and finite element methods

H. C. Li, Shen-Haw Ju

Research output: Contribution to journalArticle

Abstract

This study uses both the theoretical matrix and finite element methods to simulate the three-dimensional (3D) wave propagation in elastic layered soils with a harmonic point load acting on the surface. Choosing different multi-layer cases (two, four and eight layers) where the point load is in horizontal or vertical direction, we first investigated the accuracy of the two methods, and the comparisons indicate that the results from both are in good agreement. Few authors have investigated the irregular wave amplitude of the Love wave induced in layered soils. This study indicates that the Love wave, unlike the Rayleigh wave, might generate larger ground vibrations for a wave located far away from the source, which is called wave hump in this paper. A ratio of the Young's modulus between the top and bottom soil layers larger than three may cause obvious this condition. Moreover, a layer thickness between 0.5 and 1.5 times the wave length in the first soil layer can significantly change the magnitude of the wave hump.

Original languageEnglish
Pages (from-to)968-973
Number of pages6
JournalApplied Acoustics
Volume74
Issue number7
DOIs
Publication statusPublished - 2013 Mar 25

Fingerprint

S waves
soils
finite element method
matrices
Love waves
Rayleigh waves
wave propagation
modulus of elasticity
harmonics
vibration
causes

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

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title = "Study of irregular behavior of shear waves in layered soil using matrix and finite element methods",
abstract = "This study uses both the theoretical matrix and finite element methods to simulate the three-dimensional (3D) wave propagation in elastic layered soils with a harmonic point load acting on the surface. Choosing different multi-layer cases (two, four and eight layers) where the point load is in horizontal or vertical direction, we first investigated the accuracy of the two methods, and the comparisons indicate that the results from both are in good agreement. Few authors have investigated the irregular wave amplitude of the Love wave induced in layered soils. This study indicates that the Love wave, unlike the Rayleigh wave, might generate larger ground vibrations for a wave located far away from the source, which is called wave hump in this paper. A ratio of the Young's modulus between the top and bottom soil layers larger than three may cause obvious this condition. Moreover, a layer thickness between 0.5 and 1.5 times the wave length in the first soil layer can significantly change the magnitude of the wave hump.",
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Study of irregular behavior of shear waves in layered soil using matrix and finite element methods. / Li, H. C.; Ju, Shen-Haw.

In: Applied Acoustics, Vol. 74, No. 7, 25.03.2013, p. 968-973.

Research output: Contribution to journalArticle

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