Geotechnical Earthquake Engineering and Soil Dynamics V
Predicting Soil Liquefaction Lateral Spreading: The Missing Time Dimension
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
The most popular procedure for evaluating liquefaction potential is heavily based on peak ground acceleration (PGA). Not only is it an inadequate representation of such a complex phenomenon, but also limited to a binary classification (liquefaction or no liquefaction) without providing associated information on the damage caused by liquefaction. This paper presents an experimental study on identifying an optimum parameter that can potentially predict lateral spreading during a liquefaction event. To identify this optimal parameter, the missing dimension of time is brought into consideration with the use of evolutionary ground motion intensity measures (IMs). It is essential to identify the time that liquefaction is initiated within a given ground motion to accurately predict the lateral displacement because the damage predominantly occurs after liquefaction initiation. The experimental program using cyclic simple shear tests evaluate the responses of sands subjected to undrained transient loadings with a wide range of spectral and temporal characteristics. Out of the four IMs considered in this study, the post-initiation cumulative absolute velocity (CAV5) is identified as the most efficient IM for predicting liquefaction induced displacements.
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ACKNOWLEDGEMENT
This work was supported by the National Science Foundation, NEES Research program, under Grant No. 0936408, and the Department of Civil, Architectural and Environmental Engineering at The University of Texas at Austin. This support is gratefully acknowledged.
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Information & Authors
Information
Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 450 - 462
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:
- Continuum mechanics
- Cyclic tests
- Displacement (mechanics)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Ground motion
- Laboratory tests
- Load tests
- Mathematics
- Parameters (statistics)
- Shear tests
- Soil liquefaction
- Soil mechanics
- Soil properties
- Solid mechanics
- Statistics
- Structural dynamics
- Structural mechanics
- Tests (by type)
- Transient loads
Authors
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