Geotechnical Earthquake Engineering and Soil Dynamics V
Influence of Liquefaction History on Liquefaction Susceptibility
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
Liquefaction phenomenon observed in the Canterbury earthquake sequence, peaking during the Christchurch earthquake in February 2011, has raised questions over the effect of previous earthquakes on liquefaction susceptibility of soil. Typically, the increase of relative density due to post-liquefaction reconsolidation has been reasonably considered to increase liquefaction resistance. However, some recent laboratory experiments have provided new evidence that large shear strains during past liquefaction events may have adverse effects on the liquefaction susceptibility of sand. This study aims to investigate the effect of previous liquefaction occurrences on the current liquefaction susceptibility of granular materials under cyclic loads, through both centrifuge shaking table experiments on sand and 2D DEM (discrete element method) numerical simulations on circular particles. During both the physical experiments and the numerical simulations, the granular material repeatedly undergoes “cyclic loading and reconsolidation” cycles to examine the change in liquefaction susceptibility due to previous liquefaction history. Shear strain generated during previous liquefaction history is shown to have an opposite effect on liquefaction susceptibility compared to the densification due to reconsolidation, and could increase liquefaction susceptibility.
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ACKNOWLEDGEMENTS
The authors would like to thank the National Natural Science Foundation of China (No. 51708332 and No. 51678346) for funding the work presented in this paper.
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Information & Authors
Information
Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 304 - 310
Editors: Scott J. Brandenberg, Ph.D., University of California, Los Angeles, and Majid T. Manzari, Ph.D., George Washington University
ISBN (Online): 978-0-7844-8145-5
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Jun 7, 2018
ASCE Technical Topics:
- Analysis (by type)
- Continuum mechanics
- Cyclic loads
- Dynamic loads
- Dynamics (solid mechanics)
- Earthquakes
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Geohazards
- Geomechanics
- Geotechnical engineering
- Granular materials
- History
- History and Heritage
- Material mechanics
- Materials engineering
- Models (by type)
- Numerical analysis
- Numerical models
- Practice and Profession
- Soil liquefaction
- Soil mechanics
- Soil properties
- Solid mechanics
- Strain
- Structural dynamics
Authors
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