Assessment of an MASW technique incorporating discrete particle modelling

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Title: Assessment of an MASW technique incorporating discrete particle modelling
Authors: Donohue, Shane
Long, Michael (Michael M.)
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Date: Jun-2008
Abstract: A Discrete Particle Scheme (DPS) consisting of interacting circular particles is utilised to examine the Multichannel Analysis of Surface Waves (MASW) technique. Synthetic earth models of various complexity are generated using the DPS and analysed by the MASW dispersion and inversion techniques. For normally dispersive cases, dominated by the fundamental mode, the MASW profiles closely match the true synthetic shear wave velocity (Vs) profiles. When tested on a model that contains a low velocity layer, the accuracy is reduced. MASW field tests at a highly uniform site in Norway (Onsøy) and a site with distinctive layer boundaries in Ireland (Ballinasloe) result in highly repeatable profiles of Vs. Resolution of dispersion curves at low frequencies (<10Hz) is a problem at the Ballinasloe test site, which limits the depth of penetration of the technique. MASW inversion results compare excellently with downhole seismic cone tests at the Onsøy test site and reasonably with a seismic refraction survey at the Ballinasloe site.
Funding Details: Not applicable
Type of material: Journal Article
Publisher: Environmental & Engineering Geophysical Society
Copyright (published version): 2008 Environmental & Engineering Geophysical Society
Keywords: GeophysicsSurface wavesShear wave velocityDiscrete particle modellingSeismic cone tests
Subject LCSH: Surface waves
Shear waves
DOI: 10.2113/JEEG13.2.57
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Language: en
Status of Item: Peer reviewed
Appears in Collections:Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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