Response of a silty sand centrifuge deposit to repeated Earthquakes

Waleed El-Sekelly, Tarek Abdoun, Ricardo Dobry

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The estimation of liquefaction potential of soil deposits is mainly based on field liquefaction triggering charts based on the Seed and Idriss Simplified Method. Currently, these field liquefaction triggering charts seem to be generally conservative, as they do not take into account factors that tend to increase the liquefaction resistance of natural sand deposits located in seismic areas. The work presented in this paper incorporates data from the field, as well as centrifuge experiments performed at RPI. The experimental work involved simulating several decades to a century of earthquake events applied to a 6-m uniform silty sand deposit. The results show that repeated earthquake shaking generally has the effect of increasing the liquefaction resistance of soil deposits over time. This increase in liquefaction resistance does not seem to be fully accounted for by the simultaneous increase in the shear wave velocity of the soil. In other words, sites that have been subjected to hundreds of small earthquakes as well as some larger liquefying events may not liquefy again unless they are subjected to very intense earthquake shaking.

Original languageEnglish (US)
Title of host publicationIFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
EditorsJ. Brian Anderson, Magued Iskander, Muhannad T. Suleiman, Debra F. Laefer
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1288-1297
Number of pages10
ISBN (Electronic)9780784479087
DOIs
StatePublished - 2015
EventInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015 - San Antonio, United States
Duration: Mar 17 2015Mar 21 2015

Publication series

NameGeotechnical Special Publication
VolumeGSP 256
ISSN (Print)0895-0563

Other

OtherInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015
CountryUnited States
CitySan Antonio
Period3/17/153/21/15

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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