Journal ArticleDOI
Stiffness matrices for layered soils
Eduardo Kausel,J M Roesset +1 more
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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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Journal ArticleDOI
Resolving phase wrapping by using sliding transform for generation of dispersion curves
Jyant Kumar,Tarun Naskar +1 more
TL;DR: This work has developed a new method that is fast, accurate, and generally resolves the unwrapping of phase with the use of just two sensors, provided the signal-to-noise ratio remains high.
Journal ArticleDOI
Evaluation of condition of gravel ballast layer on high-speed railway using surface wave method based on harmonic wavelet analysis of waves
Hea-Jin Hwang,Hyung-Choon Park +1 more
TL;DR: In this paper, a surface wave method based on harmonic wavelet analysis of waves was proposed to determine the condition of a gravel ballast layer in a railway as indicated by its shear wave velocity.
Journal ArticleDOI
The influence of uncertain local subsoil conditions on the response of buildings to ground vibration
TL;DR: In this article, a probabilistic finite element-perfectly matched layers model is developed for the analysis of the dynamic soil-structure interaction problem where the shear modulus of the soil is modeled as a conditional random field.
Journal ArticleDOI
Nondestructive evaluation of pavements using spectral analysis of surface waves in the frequency wave-number domain
TL;DR: In this article, a more general method using spectral analysis in the frequency wave-number domain is presented for determining a reasonably small number of surface measurements, and the accuracy of this method in resolving experimental dispersion curves is demonstrated for a pavement site.
DissertationDOI
Vibration from underground railways : considering piled foundations and twin tunnels
TL;DR: In this paper, the effect of piled foundations on the ground-borne vibration generated by an underground railway is considered, and two approaches are pursued: the modification of an existing plane-strain pile model and the development of a fully three-dimensional model formulated in the wavenumber domain.
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.