Eighth International Conference on Case Histories in Geotechnical Engineering
Seismic Liquefaction of Sand at High Confining Pressure
Publication: Geo-Congress 2019: Earthquake Engineering and Soil Dynamics (GSP 308)
ABSTRACT
An examination of dynamic responses of clean sand under high effective confining pressure (σv′) 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.
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Information & Authors
Information
Published In
Geo-Congress 2019: Earthquake Engineering and Soil Dynamics (GSP 308)
Pages: 322 - 331
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8210-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
Published in print: Mar 21, 2019
ASCE Technical Topics:
- Centrifuges
- Construction equipment
- Continuum mechanics
- Dynamic pressure
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Equipment and machinery
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Geomechanics
- Geotechnical engineering
- Hydrologic engineering
- Pressure (type)
- Seismic tests
- Seismic waves
- Shear waves
- Soil dynamics
- Soil liquefaction
- Soil mechanics
- Soil pressure
- Soil properties
- Solid mechanics
- Tests (by type)
- Water and water resources
- Wave pressure
- Wave velocity
- Waves (mechanics)
Authors
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