Geotechnical Earthquake Engineering and Soil Dynamics V
Post-Liquefaction Volumetric Strain of Gravel-Sand Mixtures in Constant Volume Simple Shear
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
Estimation of post-liquefaction settlement is critical to robust design within a performance-based earthquake engineering framework. However, most research in soil liquefaction has focused on triggering of liquefaction rather than post-liquefaction response. In addition, the liquefaction and post-liquefaction response of gravelly soils is not as well understood as sandy soils because of the challenges of testing large particle size materials in the laboratory. In this study, a prototype large-size cyclic simple shear (CSS) device was utilized to evaluate the post-liquefaction response of gravel-sand mixtures. Test materials included 9 mm subrounded pea gravel, 8 mm angular crushed limestone (CLS8), subrounded Ottawa C109 sand, and mixtures of gravel and sand at varying percentages. Constant volume cyclic simple shear tests were performed to assess post-liquefaction volumetric strain (settlement). The effects of particle angularity, relative density, and mixture percentage on post-liquefaction volumetric strain were investigated. The results show that post-liquefaction volumetric strain is dependent on particle angularity. As particle angularity increased, the post-liquefaction volumetric strain decreased for the uniform materials (Ottawa C109 sand, pea gravel, and CLS8). The subrounded pea gravel and subrounded Ottawa C109 sand had similar post-liquefaction volumetric strains, indicating that uniform gravel and uniform sand can have similar values of post-liquefaction volumetric strain if their particle morphology is similar.
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ACKNOWLEDGMENTS
This research is based upon work supported by the National Science Foundation Graduate Student Research Fellowship under Grant No. DGE 1256260 and by the National Science Foundation CAREER Grant No. 1351403 and CMMI grant No. 1663288. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. ConeTec Investigations Ltd. and the ConeTec Education Foundation are acknowledged for their support to the Geotechnical Engineering Laboratories at the University of Michigan.
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Information & Authors
Information
Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 442 - 449
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:
- Engineering fundamentals
- Engineering materials (by type)
- Geomechanics
- Geotechnical engineering
- Gravels
- Infrastructure
- Laboratory tests
- Material mechanics
- Material tests
- Materials characterization
- Materials engineering
- Mixtures
- Particles
- Pavements
- Sandy soils
- Shear tests
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soils (by type)
- Strain
- Tests (by type)
- Transportation engineering
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