Geotechnical Earthquake Engineering and Soil Dynamics V
The Influence of the Non-Liquefied Crust on the Severity of Surficial Liquefaction Manifestations: Case History from the 2016 Valentine’s Day Earthquake in New Zealand
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
The influence of the non-liquefied crust that overlies a liquefied deposit on the severity of surficial liquefaction manifestations has been noted for several decades. In 1985, Ishihara proposed a generalize relationship relating the thicknesses of the non-liquefied crust and of the liquefied stratum to the severity of surficial liquefaction manifestations. Although subsequent studies using data from multiple earthquakes give credence to Ishihara’s relationship, the implementation of the procedure is tenuous for all but the simplest of profiles. In an effort to overcome issues with implementing the Ishihara relationship, new procedures have been proposed for predicting the severity of surficial liquefaction manifestations. The efficacies of two of these procedures are currently being assessed in a study using unique case history data from the 2016, Mw5.7 Valentine’s Day earthquake that impacted Christchurch, New Zealand. Preliminary results from this study show that both procedures yield predictions that are in accord with field observations. However, the final results from the ongoing study are expected to more fully assess the efficacies of these procedures.
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ACKNOWLEDGEMENTS
Support for the U.S. authors was provided in part by the U.S. National Science Foundation (NSF) as part of the Geotechnical Extreme Event Reconnaissance (GEER) Association activity through CMMI-1300744 and grants CMMI-1030564, CMMI-1435494, and CMMI-1724575. The authors also gratefully acknowledge Claudio Cappellaro and other members of the post-earthquake reconnaissance team from the University of Canterbury and Tonkin + Taylor Ltd. However, any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of NSF.
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Information & Authors
Information
Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 21 - 32
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:
- Case studies
- Earthquake engineering
- Earthquake resistant structures
- Earthquakes
- Engineering fundamentals
- Field tests
- Geohazards
- Geomechanics
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials engineering
- Methodology (by type)
- Research methods (by type)
- Soil liquefaction
- Soil mechanics
- Soil properties
- Tests (by type)
- Thickness
Authors
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