The importance of accurate time-integration in the numerical modelling of P-wave propagation

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Title: The importance of accurate time-integration in the numerical modelling of P-wave propagation
Authors: Tsaparli, V
Kontoe, S
Taborda, D
Potts, D
Item Type: Journal Article
Abstract: The numerical dissipation characteristics of the Newmark and generalised-α time-integration schemes are investigated for P-wave propagation in a fully saturated level-ground sand deposit, where higher frequencies than those for S-waves are of concern. The study focuses on resonance, which has been shown to be of utmost importance for triggering liquefaction due to P-waves alone. The generalised-α scheme performs well, provided that the time-step has been carefully selected. Conversely, the dissipative Newmark method can excessively damp the response, changing radically the computed results. This implies that a computationally prohibiting small time-step would be required for Newmark to provide an accurate solution.
Issue Date: 1-Jun-2017
Date of Acceptance: 29-Jan-2017
ISSN: 1873-7633
Publisher: Elsevier
Start Page: 203
End Page: 208
Journal / Book Title: Computers and Geotechnics
Volume: 86
Copyright Statement: © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://
Sponsor/Funder: Geotechnical Consulting Group
Engineering and Physical Sciences Research Council
Funder's Grant Number: GCG Chair
EPSRC grant number 1386368
Keywords: Geological & Geomatics Engineering
0905 Civil Engineering
0914 Resources Engineering And Extractive Metallurgy
0915 Interdisciplinary Engineering
Publication Status: Published
Open Access location:
Appears in Collections:Faculty of Engineering

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