Evaluation of variable permeability model in simulation of seismic behavior of uniform level and gently sloping sand layers

Ghassemi, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.15446/esrj.v24n3.60654
  3. Publisher: Universidad Nacional de Colombia , 2020
  4. Abstract:
  5. In this study, a fully coupled dynamic finite element model was employed for numerical simulation of the response of level to gently sloping saturated sand layers subjected to cyclic loading. This model utilized a critical state two-surface-plasticity constitutive model to simulate the cyclic behavior of sandy soil. Moreover, a recently proposed variable permeability function was implemented in the numerical model to reflect the effects of soil permeability variations during the liquefaction phenomenon. The numerical model was validated by simulating a number of well-documented geotechnical centrifuge tests with different relative density of sand, base acceleration time history, and surface slope of the sand layer. The obtained results confirmed that the developed model was capable of simulating the behavior of saturated sand under cyclic loading for both level and gently sloping conditions. © 2020, Universidad Nacional de Colombia. All rights reserved
  6. Keywords:
  7. Cyclic loading ; Liquefaction ; Numerical simulation ; Variable permeability ; Centrifugal model test ; Cyclic loading ; Liquefaction ; Model validation ; Numerical model ; Seismic response ; Simulation
  8. Source: Earth Sciences Research Journal ; Volume 24, Issue 3 , 2020 , Pages 328-336
  9. URL: https://revistas.unal.edu.co/index.php/esrj/article/download/60654/76717/498845