Journal ArticleDOI
Stiffness matrices for layered soils
Eduardo Kausel,J M Roesset +1 more
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TLDR
In this article, the Haskell-Thompson transfer matrix method is used to derive layer stiffness matrices which may be interpreted and applied in the same way as stiffness matrix in conventional structural analysis, and the exact expressions are given for the matrices, as well as approximations for thin layers.Abstract:
The Haskell-Thompson transfer matrix method is used to derive layer stiffness matrices which may be interpreted and applied in the same way as stiffness matrices in conventional structural analysis These layer stiffness matrices have several advantages over the more usual transfer matrices: (1) they are symmetric; (2) fewer operations are required for analysis; (3) there is an easier treatment of multiple loadings; (4) substructuring techniques are readily applicable; and (5) asymptotic expressions follow naturally from the expressions (very thick layers; high frequencies, etc) While the technique presented is not more powerful than the original Haskell-Thompson scheme, it is nevertheless an elegant complement to it The exact expressions are given for the matrices, as well as approximations for thin layers Also, simple examples of application are presented to illustrate the use of the methodread more
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Recent advances on the fast multipole accelerated boundary element method for 3D time-harmonic elastodynamics
Stéphanie Chaillat,Marc Bonnet +1 more
TL;DR: In this article, a review on fast BEMs for elastodynamics, with particular attention on time-harmonic fast multipole methods (FMMs), is presented, and results on numerical tests for the multipole evaluation of the half-space traction Green tensor and the FMM treatment of a sample 3D problem involving wave scattering by an underground cavity demonstrate the accuracy of the proposed approach.
Journal ArticleDOI
Dynamic‐stiffness matrix of soil by the boundary‐element method: Embedded foundation
John P. Wolf,Georges R. Darbre +1 more
TL;DR: In this article, the authors derived the Green's influence functions for a linearly distributed load acting on part of a layered elastic halfplane on a line which is inclined to the horizontal.
Journal ArticleDOI
Double wall barriers for the reduction of ground vibration transmission
TL;DR: In this paper, the potential of using double walls in reducing ground vibration transmission is investigated by means of numerical simulations, and double wall barriers are found to be slightly more effective than single wall barriers in particular when the thickness of the walls and the intermediate soil matches a quarter Rayleigh wavelength.
Journal ArticleDOI
Backcalculation of Asphalt Concrete Modulus Master Curve from Field-Measured Falling Weight Deflectometer Data: Using a New Time Domain Viscoelastic Dynamic Solution and Genetic Algorithm
TL;DR: In this article, a backcalculation program, Dyna-back-ve, was used to backcalculate pavement layer properties with field data using a time domain viscoelastic dynamic solution (ViscoWave-II) as a forward routine and a genetic algorithm for back-calculation analysis.
Journal ArticleDOI
Scoping assessment of free-field vibrations due to railway traffic
TL;DR: In this article, a 2.5D combined finite element-boundary element (FEM-BEM) model is proposed to predict free-field vibration levels in accordance with the most common international standards.
References
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Book ChapterDOI
The Dispersion of Surface Waves on Multilayered Media
TL;DR: In this paper, a matrix formalism developed by W. T. Thomson is used to obtain the phase velocity dispersion equations for elastic surface waves of Rayleigh and Love type on multilayered solid media.
Journal ArticleDOI
Transmission of Elastic Waves through a Stratified Solid Medium
TL;DR: In this article, the transmission of a plane elastic wave at oblique incidence through a stratified solid medium consisting of any number of parallel plates of different material and thickness is studied theoretically.
Journal ArticleDOI
Shear Waves in Plane Infinite Structures
John Lysmer,Gunter Waas +1 more
TL;DR: In this paper, a numerical procedure is developed for the dynamic analysis of plane, linearly elastic systems consisting of an irregular zone joined to semi-infinite layered zones, where all exciting forces are assumed to be harmonic and perpendicular to the plane of the structure.
Journal ArticleDOI
Lumped mass method for Rayleigh waves
TL;DR: In this paper, a simple numerical method is developed for the analysis of generalized Rayleigh waves in multilayered elastic media, which completely avoids the use of displacement potentials and leads to a simple eigenvalue problem which may be solved by generally available effective computer codes.