Coupled SPH-DEM simulations of liquefaction-induced flow failure

نویسندگان

چکیده

A fully Lagrangian particle-based method for coupled fluid-particle interaction is utilized to evaluate flow liquefaction of saturated granular soils overlain by an impermeable crust. The solid particles are modelled as spherical using the discrete element (DEM). smoothed particle hydrodynamics (SPH) employed model interstitial fluid averaged form Navier-Stokes equations that accounts presence phase. coupling between SPH and DEM achieved through local averaging techniques well-established semi-empirical formulas interaction. responses loose dense level deposits crust a seismic excitation first analyzed. deposit exhibited significant pore pressure development while barely showed any considerable buildup did not liquefy. formation water film was visible at interface top underlying liquefied soil. When same were tilted infinite slope, lgiquefaction location immediately underneath large shear strains accumulated within thin layer below Flow marked dilative behavior surface sand lateral spreading continued post-shaking. Void redistribution observed along in dilation near contraction deeper depth. sloping liquefy observed.

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ژورنال

عنوان ژورنال: Soil Dynamics and Earthquake Engineering

سال: 2021

ISSN: ['1879-341X', '0267-7261']

DOI: https://doi.org/10.1016/j.soildyn.2021.106683