Investigation of strain localization in sand under triaxial compression: insights from internal pore-water pressure measurements
Yawu Liang, Nicholas Beier, DC Sego
In the proceedings of: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Tailings and Liquefaction
ABSTRACT: The mechanism of strain localization in granular material is associated with the development of progressive failure of slopes and soil liquefaction. A series of consolidated, undrained triaxial tests were conducted on saturated, dense and loose sand with internal pore-water pressure measurements to investigate the correlation between the internal pore-water pressure response and the evolution of strain localization. An incremental pore-water pressure coefficients, a and 1/a, were introduced to evaluate the change of shear stress on a short-time scale. A spike in coefficient a before the peak shear strength in dense sand is interpreted as the initiation of strain localization. In dense and loose sand, a substantial spike in coefficient a around peak stress is associated with the onset of persistent shear band development or strain softening. Also, the progression of persistent shear banding or the concentration of strain localization in the post-peak stage can be characterized by the variation of coefficient 1/a.
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Liang, Yawu, Beier, Nicholas, Sego, DC (2023) Investigation of strain localization in sand under triaxial compression: insights from internal pore-water pressure measurements in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Liang_GEO2023_22,
author = {{Liang, Yawu}, {Beier, Nicholas}, {Sego, DC}}
title = {Investigation of strain localization in sand under triaxial compression: insights from internal pore-water pressure measurements }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Investigation of strain localization in sand under triaxial compression: insights from internal pore-water pressure measurements }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }