Soil characterization in centrifuge models through measurement of shear wave velocities using bender elements

Waleed El-Sekelly, Tarek Abdoun, Ricardo Dobry

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

Abstract

The determination of the dynamic properties of the soil is a critical issue in geotechnical engineering. It is of a particular importance in problems involving dynamic excitation of soil systems, such as earthquakes. This research focuses on measuring the velocity of seismic waves, particularly shear waves, in the centrifuge soil models. The high noise during the centrifuge operation, and the need of using a number of bender elements in the same model, makes the use of bender elements in the centrifuge more challenging. The research starts with improving the current bender elements system at RPI Geotechnical Centrifuge Center. This involves solving electric and electromagnetic problems in the system and reducing noise and ghosting effects. The improved bender elements system is then used to determine the shear (S) wave velocities of dry Ottawa sand at different void ratios and different overconsolidation ratios in the centrifuge. The shear wave velocity measurements are also used to estimate the effect of overconsolidation on the coefficient of lateral earth pressure at rest (Ko). A comparison of the results is done with those published in the literature.

Original languageEnglish (US)
Title of host publicationGeoCongress 2012
Subtitle of host publicationState of the Art and Practice in Geotechnical Engineering
Pages2037-2047
Number of pages11
Edition225 GSP
DOIs
StatePublished - Dec 1 2012
EventGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering - Oakland, CA, United States
Duration: Mar 25 2012Mar 29 2012

Publication series

NameGeotechnical Special Publication
Number225 GSP
ISSN (Print)0895-0563

Other

OtherGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering
CountryUnited States
CityOakland, CA
Period3/25/123/29/12

ASJC Scopus subject areas

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

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  • Cite this

    El-Sekelly, W., Abdoun, T., & Dobry, R. (2012). Soil characterization in centrifuge models through measurement of shear wave velocities using bender elements. In GeoCongress 2012: State of the Art and Practice in Geotechnical Engineering (225 GSP ed., pp. 2037-2047). (Geotechnical Special Publication; No. 225 GSP). https://doi.org/10.1061/9780784412121.209