Seismic Liquefaction of Sand at High Confining Pressure

Min Ni, Tarek Abdoun, Ricardo Dobry

Research output: Contribution to journalConference article

Abstract

An examination of dynamic responses of clean sand under high effective confining pressure (σ v ) is conducted with two centrifuge tests using laminar container. The centrifuge experiments simulate a 5 m saturated clean sand layer under high effective overburden pressure of 6 atm with the relative density of 40%. To achieve the targeted overburden pressure, a dry layer of lead shot with an appropriate thickness was deposited on the top of the clean sand. Viscous fluid was used for saturation to keep a constant prototype permeability. The centrifuge tests were subjected to 10 cycles sinusoidal seismic motions with a different prototype peak acceleration to study the effects of pre-shaking history. Acceleration, pore pressure build-up and dissipation, and shear wave velocity were recorded during and after shaking. The recorded accelerations were further analyzed using an established system identification (SI) technique to evaluate the cyclic stresses and strains induced in the soil deposit. Furthermore, the effects of pre-shaking history were analyzed in the aspects of excess pore pressure build-up, shear wave velocity changes, and soil deposit densification.

Original languageEnglish (US)
Article number033
Pages (from-to)322-331
Number of pages10
JournalGeotechnical Special Publication
Volume2019-March
Issue numberGSP 308
DOIs
StatePublished - Jan 1 2019
Event8th International Conference on Case Histories in Geotechnical Engineering: Earthquake Engineering and Soil Dynamics, Geo-Congress 2019 - Philadelphia, United States
Duration: Mar 24 2019Mar 27 2019

Fingerprint

Centrifuges
Liquefaction
centrifuge
confining pressure
liquefaction
Sand
Shear waves
Pore pressure
overburden
pore pressure
sand
wave velocity
S-wave
Deposits
lead shot
Soils
peak acceleration
history
dynamic response
Densification

ASJC Scopus subject areas

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

Cite this

Seismic Liquefaction of Sand at High Confining Pressure. / Ni, Min; Abdoun, Tarek; Dobry, Ricardo.

In: Geotechnical Special Publication, Vol. 2019-March, No. GSP 308, 033, 01.01.2019, p. 322-331.

Research output: Contribution to journalConference article

Ni, Min ; Abdoun, Tarek ; Dobry, Ricardo. / Seismic Liquefaction of Sand at High Confining Pressure. In: Geotechnical Special Publication. 2019 ; Vol. 2019-March, No. GSP 308. pp. 322-331.
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