Geo-Congress 2020
Comparison of Earthquake-Induced Pore Water Pressure and Deformations in Earthen Dams Using Non-Linear and Equivalent Linear Analyses
Publication: Geo-Congress 2020: Geotechnical Earthquake Engineering and Special Topics
ABSTRACT
Earthquake excitations often cause an increase in pore water pressure in contractive sands resulting in liquefaction, which can lead to catastrophic consequences. Therefore, it is imperative to assess the earthquake-induced excess pore water pressure and deformations to evaluate the post-earthquake serviceability of the important structures such as earthen dams. The analyses are usually performed using the equivalent linear method or the non-linear method. The purpose of this research is to evaluate and compare the excess pore water pressure and associated deformations predicted using these two methods of analyses. Two numerical models of a typical zoned earthen dam were subjected to two earthquake time-history data with significantly different frequency contents to comprehend the differences in the outcome. The analyses results are similar for dams with dense sand shells when subjected to low-intensity earthquake excitations with the predominant frequency significantly different from the first natural frequency of the structure.
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ACKNOWLEDGMENT
The numerical analyses were performed using GeoStudio and Plaxis 2D software packages.
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Information & Authors
Information
Published In
Geo-Congress 2020: Geotechnical Earthquake Engineering and Special Topics
Pages: 151 - 160
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8281-0
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
Published in print: Feb 21, 2020
ASCE Technical Topics:
- Comparative studies
- Continuum mechanics
- Deformation (mechanics)
- Dynamics (solid mechanics)
- Earthquakes
- Engineering fundamentals
- Engineering mechanics
- Geohazards
- Geotechnical engineering
- Linear analysis
- Methodology (by type)
- Nonlinear analysis
- Pore pressure
- Pore water
- Pressure (type)
- Research methods (by type)
- Soil deformation
- Solid mechanics
- Structural analysis
- Structural engineering
- Structural mechanics
- Water (by type)
- Water and water resources
- Water management
- Water pressure
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