Eighth International Conference on Case Histories in Geotechnical Engineering
An Experimental and Numerical Study of Prefabricated Vertical Drains as a Liquefaction Countermeasure for Mat-Founded Structures
Publication: Geo-Congress 2019: Earthquake Engineering and Soil Dynamics (GSP 308)
ABSTRACT
Centrifuge experiments and parallel nonlinear numerical simulations were conducted to investigate the seismic response of potentially inelastic, multi-degree-of-freedom structures on layered, liquefiable soil deposits and the effectiveness of mitigation with prefabricated vertical drains (PVDs). Fully-coupled, 3D, nonlinear numerical simulations of the soil-foundation-structure system in centrifuge were performed in the finite element platform OpenSEES. Experimental results showed that PVDs can effectively speed up pore pressure dissipation after shaking and reduce building’s settlement and tilt potential. PVD were, however, shown to increase roof accelerations, displacements, and drift ratios, which need to be considered in design. Although the numerical results showed some discrepancies in capturing the dissipation rate of excess pore pressure and foundation’s residual tilt, they generally captured its settlement, particularly for thinner liquefiable layers. Future improvements are needed in the numerical models to better capture the rate of dissipation, volumetric strains due to sedimentation, and the localized deformations responsible for foundation’s cumulative rotation over time.
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Information & Authors
Information
Published In
Geo-Congress 2019: Earthquake Engineering and Soil Dynamics (GSP 308)
Pages: 219 - 228
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8210-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
Published in print: Mar 21, 2019
ASCE Technical Topics:
- Analysis (by type)
- Centrifuges
- Construction engineering
- Construction equipment
- Construction industry
- Construction management
- Continuum mechanics
- Drainage
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Equipment and machinery
- Geomechanics
- Geotechnical engineering
- Irrigation engineering
- Layered soils
- Models (by type)
- Numerical analysis
- Numerical models
- Offsite construction
- Pore pressure
- Pressure (type)
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soils (by type)
- Solid mechanics
- Water and water resources
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