Computational fluid dynamics-based modeling of liquefied soils

S. Banerjee, J. Chen, D. L. Hitt, M. M. Dewoolkar, S. M. Olson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The residual shear strength of liquefied soil is a key parameter in evaluating liquefaction flow failures. Results from a series of dynamic centrifuge experiments where the shear strength of liquefied soil was inferred by measuring the force required to pull a thin metal plate (coupon) horizontally through the liquefied soil are assessed here using a computational fluid dynamics (CFD) based model. Viscosity is a key parameter for the Newtonian fluid constitutive model used in the simulations, and apparent viscosities of liquefied soil in the range of about 5,800 – 13,300 Pa·s were obtained when the CFD model was calibrated against coupons pulled through liquefied soil in dynamic centrifuge tests. These computational values agree reasonably with apparent viscosities of liquefied soil reported in the literature when the Reynold’s numbers exceeded 1.0. Importantly, the CFD simulations illustrated that in cases where Reynold’s numbers are < 1.0, apparent viscosities of liquefied soil back-calculated using simplistic closed-form solutions commonly applied in geotechnical literature are several orders of magnitude too large; and therefore, such closed-form solutions should not be used for these cases.

Original languageEnglish (US)
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages1297-1304
Number of pages8
ISBN (Print)9780367143282
StatePublished - 2019
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: Jan 17 2019Jan 20 2019

Publication series

NameEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
CountryItaly
CityRome
Period1/17/191/20/19

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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