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Seismic harmonic response of inhomogeneous soil: scaling analysis

Garcia-Suarez, Joaquin and Seylabi, Elnaz and Asimaki, Domniki (2021) Seismic harmonic response of inhomogeneous soil: scaling analysis. Géotechnique, 71 (5). pp. 392-405. ISSN 0016-8505. doi:10.1680/jgeot.19.p.042.

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The study of the seismic response of inhomogeneous soil deposits, underlying rigid bedrock, has traditionally been framed as a one-dimensional wave propagation problem in a linear viscoelastic medium. When it comes to modelling soil inhomogeneity, the current trend to model the continuous variation of soil stiffness with depth employs a ‘generalised parabolic function’. Exact solutions have already been obtained, but these come in terms of Bessel functions, which muddle the interpretation of results and obstruct assessment of the parameters’ influence. This also hinders the definition of an ‘equivalent homogeneous’ soil deposit (a relevant concept utilised in many seismic codes). It is shown herein that the so-called inhomogeneity factor plays a secondary role in determining the response in many cases; thus straightforward guidelines are suggested for simplifying the problem, leading to elementary scaling relations. The scalings provide simple yet meaningful relations that reveal and explain the fundamental traits of the dynamic behaviour of these systems.

Item Type:Article
Related URLs:
URLURL TypeDescription
Garcia-Suarez, Joaquin0000-0001-8830-4348
Seylabi, Elnaz0000-0003-0718-372X
Asimaki, Domniki0000-0002-3008-8088
Additional Information:© ICE Publishing 2021. Manuscript received 1 February 2019; revised manuscript accepted 21 February 2020. Published online ahead of print 24 March 2020. The first author would like, first, to thank the Tyson family for funding his work at Caltech through the Tyson Graduate Fellowship, and second, to dedicate this work to Professor Fernando Medina from University of Seville (Spain), mentor and friend.
Funding AgencyGrant Number
Tyson Graduate FellowshipUNSPECIFIED
Subject Keywords:dynamics; earthquakes; theoretical analysis
Issue or Number:5
Record Number:CaltechAUTHORS:20210517-100803191
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109147
Deposited By: Tony Diaz
Deposited On:17 May 2021 18:03
Last Modified:17 May 2021 18:03

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