The importance of accurate time-integration in the numerical modelling of P-wave propagation
File(s)
Published version
Author(s)
Tsaparli, V
Kontoe, S
Taborda, D
Potts, D
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.
Date Issued
2017-06-01
Date Acceptance
2017-01-29
Citation
Computers and Geotechnics, 2017, 86, pp.203-208
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://
creativecommons.org/licenses/by/4.0/).
creativecommons.org/licenses/by/4.0/).
Sponsor
Geotechnical Consulting Group
Engineering and Physical Sciences Research Council
Grant Number
GCG Chair
EPSRC grant number 1386368
Subjects
Geological & Geomatics Engineering
0905 Civil Engineering
0914 Resources Engineering And Extractive Metallurgy
0915 Interdisciplinary Engineering
Publication Status
Published