An energy-based interpretation of sand liquefaction due to vertical ground motion

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Title: An energy-based interpretation of sand liquefaction due to vertical ground motion
Authors: Tsaparli, V
Kontoe, S
Taborda, D
Potts, D
Item Type: Journal Article
Abstract: In several recent earthquakes, high vertical ground accelerations accompanied by liquefaction were observed. Downhole records have also shown that large vertical accelerations do not necessarily originate from the source, but rather get amplified towards the ground surface. Given the advantages of energy-based interpretation of liquefaction triggering due to S-waves, this approach is used together with finite element analyses to investigate vertical motion amplification and ensuing liquefaction. The results show the importance of the post-resonance response cycles, while hysteretic damping based on total stresses, accounting for the water in the pores, is shown to be very low, explaining the observed amplification.
Issue Date: 17-May-2017
Date of Acceptance: 3-May-2017
URI: http://hdl.handle.net/10044/1/48433
DOI: https://dx.doi.org/10.1016/j.compgeo.2017.05.006
ISSN: 0266-352X
Publisher: Elsevier
Start Page: 1
End Page: 13
Journal / Book Title: Computers and Geotechics
Volume: 90
Copyright Statement: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC-BY license (http://creativecommons.org/licenses/by/4.0/).
Sponsor/Funder: Geotechnical Consulting Group
Geotechnical Consulting Group
Engineering and Physical Sciences Research Council
Funder's Grant Number: GCG Chair
CISM_P60087
EPSRC grant number 1386368
Keywords: Geological & Geomatics Engineering
0905 Civil Engineering
0914 Resources Engineering And Extractive Metallurgy
0915 Interdisciplinary Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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