Effectiveness of PV Drains for Mitigating Earthquake-Induced Deformations in Sandy Slopes
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Vytiniotis&Whittle-GeoCongress2013.pdf
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Author(s)
Vytiniotis, Antonios
Whittle, Andrew
Date Issued
February 2013
Journal
Geo-Congress 2013
Publisher
American Society of Civil Engineers (ASCE)
Citation
Vytiniotis, Antonios, and Andrew J. Whittle. “Effectiveness of PV Drains for Mitigating Earthquake-Induced Deformations in Sandy Slopes.” Geo-Congress 2013. American Society of Civil Engineers, 2013. 908–917.
Version
Author's final manuscript
Abstract
This paper considers the effectiveness of a Pre-fabricated Vertical (PV) drain array for mitigating the earthquake-induced permanent ground deformations of a water-fronting loose sand fill based on results of numerical simulations. The numerical simulations are performed using the OpenSees finite element framework to represent the non-linear coupled ground deformation and transient pore pressures with customized 1-D finite elements to describe flow in the PV drains. Soil behavior is modeled using an advanced elasto-plastic effective stress soil model ("DM" for Dafalias & Manzari, 2004). The analyses focus on the performance of an 18.3m high sand fill, representative of many west-coast port facilities, and compare the response with and without the PV drain mitigation system for a suite of 58 reference seismic ground motions. The computed permanent slope deformations are well correlated with the peak ground accelerations (PGA) and especially the Arias intensity (I[subscript a]). The PV drain mitigation system is effective in reducing permanent lateral deformations at the crest of the slope by a factor of 1.2 - 3.5. The system effectiveness is largely independent of the characteristics of the ground motions. The damage results have been incorporated in slope fragility curves that can be used to quantify the expected costs from earthquake damage.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1061/9780784412787.093
