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Multi-scale investigation of active failure for various modes of wall movement

Frontiers of Structural and Civil Engineering 2021年第4期15卷 961-979页

作者： Ahmet Talha GEZGIN Behzad SOLTANBEIGI Adlen ALTUNBAS Ozer CINICIOGLU Department of Civil Engineering Bogazici UniversityIstanbul34342Turkey Estimating&Engineering Department Van Oord Dredging and Marine ContractorsRotterdam3063 NHThe Netherlands Department of Civil Engineering Medipol UniversityIstanbul34810Turkey

Retained backfill response to wall movement depends on factors that range from boundary conditions to the geometrical characteristic of individual ***,mechanical understanding of the problem warrants multi-scale analyses that investigate reciprocal relationships between macro and micro ***,this study attempts a multi-scale examination of failure evolution in cohesionless ***,the transition of retained backfills from at-rest condition to the active state is modeled using the discrete element method(DEM).DEM allows conducting virtual experiments,with which the variation of particle and boundary properties is ***,various modes of wall movement(translation and rotation)toward the active state are modeled using two different backfills with distinct particle shapes(spherical and nonspherical)under varying *** each model,cumulative rotations of single particles are tracked,and the results are used to analyze the evolution of shear bands and their geometric ***,dependencies of lateral pressure coefficients and coordination numbers,as respective macro and micro behavior indicators,on particle shape,boundary conditions,and surcharge levels are ***,contact force networks are visually determined,and their influences on pressure distribution and deformation mechanisms are discussed with reference to the associated modes of wall movement and particle shapes.

关键词： discrete-element modelling granular materials retaining walls particle shape arching

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