Showing papers in "Computers and Geotechnics in 2021"

TL;DR: In this article, a coupled thermo-hydro-mechanical mechanism was established in view of the soil particle rearrangement for saturated/unsaturated soils under the framework of granular thermodynamics.

TL;DR: In this paper, a new analytical approach for the vertical vibration of a floating pile in saturated viscoelastic soil is proposed, by combining the differential operator method with a fictitious saturated soil pile (FSSP) model.

TL;DR: In this paper, a generalized probability density evolution method (GPDEM) was proposed to investigate the system reliability of complex slopes with consideration to uncertainty in multiple slope parameters and in ground motions.

TL;DR: In this article, the coupled effect of the soil spatial variations and the disturbance of ground surface on the existing tunnel using random finite difference method (RFDM) is investigated, where the soil Young's modulus is highlighted and simulated with horizontally stratified anisotropic random field that is discretized by the Karhunen-Loeve expansion.

TL;DR: A new and robust SPH approximation formulation for the Laplacian, which involves the second-order derivatives of a field quantity is proven to outperform existing SPH formulations and achieve high accuracy.

TL;DR: The capability of the GPU-accelerated SPFEM in solving large-scale complicated problems is demonstrated by modelling the progressive failure of a long slope with strain-softening soil.

TL;DR: In this paper, the effects of sloping ground on the vertical pile-to-pile interaction for endbearing piles embedded in a homogenous soil are investigated through three-dimensional finite element simulations.

TL;DR: In this article, the performance of the Riedel-Hiermaier-Thoma (RHT) model and the Holmquist-Johnson-Cook (HJC) model in numerical simulations of blast-induced cracks in granite was analyzed.

TL;DR: In this paper, a novel elastoplastic solution for undrained expansion of a cylindrical cavity in SANICLAY under plane stress condition was developed, which can provide a reasonable approach to interpret the pressuremeter test and model pile installation effects near the surface of the natural anisotropic clays.

TL;DR: In this article, a coupled smoothed particle hydrodynamics (SPH)-discrete element method (DEM) code was developed and applied to simulate the process of landslide tsunamis.

TL;DR: In this paper, the authors proposed a probabilistic method for simulating the entire process of rainfall-induced landslides considering spatial variability of soil properties and proposed a two-stage method combining finite element method and material point method to simulate a landslide from triggering by rainfall to post-failure large deformation of soils.

TL;DR: In this article, a thorough numerical study is conducted to rigorously evaluate the lateral earth pressures exerted on the retaining walls backfilled with geosynthetic-reinforced soil strata.

TL;DR: In this paper, a 3D discrete element model of rock-cutting using a disc-cutter was established via the high-performance MatDEM software, and the influence of different joint parameters (e.g., joint inclination, orientation, spacing, etc.) on cutting force and rock fragmentation volume was examined.

TL;DR: In this article, a numerical model containing a large number of (3120) pore pressure cohesive elements is built for modelling the randomly crossing and branching of hydraulic fractures, and the effects of the distribution and cementation strength of pre-existing natural fractures on the propagation of complex hydraulic fracture networks are investigated.

TL;DR: In this paper, the authors provide a framework for a consistent uncertainty assessment of relative permeability measurements using inverse modeling with the numerical solution of the 2-phase Darcy equations, where the non-uniqueness, correlation of matching parameters and non-Gaussian errors are observed.

TL;DR: In this article, an enhanced tool by combining X-ray micro-computed tomography test and hybrid finite and discrete element method is proposed to investigate the mechanical behaviors of granular materials.

TL;DR: In this article, the performance of three advanced constitutive models has been evaluated based on element tests and on a comparative study on the simulation of vibratory pile driving tests in saturated sand.

TL;DR: In this paper, a method is proposed for simultaneously estimating the trend and random component of soil properties at arbitrary locations using Gaussian process regression with the superposition of multiple Gaussian random fields.

TL;DR: Wang et al. as mentioned in this paper proposed a 3D moisture migration model with the combined finite discrete element method (FDEM), which can simulate the moisture migration process in soil, and applied the shrinkage stress as a load to perform the deformation and fracture calculations of FDEM.

TL;DR: In this paper, a mapping between rolling friction and true sphericity is proposed to simplify the calibration of rolling resistance at the contact of a contact parameter and a 3D grain shape descriptor, which can be obtained either directly by 3D acquisition or by correlation with simpler-to-obtain 2D shape measures.

TL;DR: In this article, a non-iterative analytical method to calculate the mechanical field of multiple lined tunnels is presented, where the analytic function is expanded by Laurent series on each tunnel boundary so that the stress and displacement fields in the whole multiply-connected domain can be expressed accurately.

TL;DR: In this article, a 2D continuous-discontinuous heat conduction model is proposed to simulate heat transfer and thermal cracking in fractured quasi-brittle materials by combining with mechanical calculations of the Finite-Discrete Element Method.

TL;DR: In this article, a micro-elastoplastic constitutive model considering the post-peak stage of rock mass under compression loading is proposed, and the loading-unloading path in the post peak stage of the rock is considered.

TL;DR: A semi-analytical elastoplastic solution for cylindrical cavity expansion in overconsolidated (OC) unsaturated soils under constant water content condition, in which both the OC features and the coupled hydro-mechanical behaviour of soils are properly addressed, is presented in this paper.

TL;DR: In this paper, a 3D numerical model was proposed to investigate the progressive time-dependent deformation and fracturing of brittle rock, and the model can accurately replicate the evolution of strain and strain rate as a function of time, the output of acoustic emission energy and the emergence of a macroscopic failure plane.

TL;DR: In this paper, a general framework for DEM simulation considering realistic particle shape and grading characteristics is proposed, and numerical triaxial drained compression tests are conducted for five granular assemblies of different overall regularity.

TL;DR: In this paper, a series of centrifuge tests and numerical back-analyses by the Finite Difference Method were performed to investigate the influence of the ground anisotropic permeability and the tunnel face opening on tunnel face stability under the seepage condition.

TL;DR: In this paper, the authors investigated the interaction process between grouted bolts and tunnel surrounding rock, and established an analytical model for deep tunnels reinforced with active grouted rockbolts of the convergence-confinement type.

TL;DR: In this article, a critical criterion for tensile-shear failure including tensile truncation was proposed firstly based on Mohr-Coulomb criterion, and a new calculation method of shear strength parameters was deduced based on the critical state stress circle.