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Effects of Local Soil Conditions on the Topographic Aggravation of Seismic Motion: Parametric Investigation and Recorded Field Evidence from the 1999 Athens Earthquake

Assimaki, Dominic and Gazetas, George and Kausel, Eduardo (2005) Effects of Local Soil Conditions on the Topographic Aggravation of Seismic Motion: Parametric Investigation and Recorded Field Evidence from the 1999 Athens Earthquake. Bulletin of the Seismological Society of America, 95 (3). pp. 1059-1089. ISSN 0037-1106. doi:10.1785/0120040055. https://resolver.caltech.edu/CaltechAUTHORS:20140902-133617423

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Abstract

During the 1999 Athens earthquake, the town of Adàmes, located on the eastern side of the Kifissos river canyon, experienced unexpectedly heavy damage. Despite the particular geometry of the slope that caused significant motion amplification, topography effects alone cannot explain the uneven damage distribution within a 300-m zone parallel to the canyon’s crest, which is characterized by a rather uniform structural quality. In this article, we illustrate the important role of soil stratigraphy and material heterogeneity on the topographic aggravation of surface ground motion. For this purpose, we first conduct an extensive time-domain parametric study using idealized stratified profiles and Gaussian stochastic fields to characterize the spatial distribution of soil properties, and using Ricker wavelets to describe the seismic input motion; the results show that both topography and local soil conditions significantly affect the spatial variability of seismic motion. We next perform elastic two-dimensional wave propagation analyses based on available local geotechnical and seismological data and validate our results by comparison with aftershock recordings.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1785/0120040055DOIArticle
http://bssa.geoscienceworld.org/content/95/3/1059.abstractPublisherArticle
http://bssa.geoscienceworld.org/content/95/3/1059PublisherArticle
ORCID:
AuthorORCID
Assimaki, Dominic0000-0002-3008-8088
Additional Information:Copyright © 2005 Bulletin of the Seismological Society of America. Manuscript received 1 April 2004.
Issue or Number:3
DOI:10.1785/0120040055
Record Number:CaltechAUTHORS:20140902-133617423
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140902-133617423
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49123
Collection:CaltechAUTHORS
Deposited By: Carolina Sustaita
Deposited On:03 Sep 2014 23:57
Last Modified:10 Nov 2021 18:40

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