Numerical Models in Geomechanics: Proceedings of the 8th International Symposium Numog VIII, Rome, Italy, 10-12 April 2002

Numerical Models in Geomechanics: Proceedings of the 8th International Symposium Numog VIII, Rome, Italy, 10-12 April 2002

by G.N. Pande

ISBN-10: 905809359X

ISBN-13: 9789058093592

Pub. Date: 10/01/1902

Publisher: Taylor & Francis

The papers in this volume reflect the current research and advances made in the application of numerical methods in geotechnical engineering. Topics include: instabilities in soil behaviour; environmental geomechanics; and hydro-mechanical coupling in problems of engineering.


The papers in this volume reflect the current research and advances made in the application of numerical methods in geotechnical engineering. Topics include: instabilities in soil behaviour; environmental geomechanics; and hydro-mechanical coupling in problems of engineering.

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Taylor & Francis
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7.00(w) x 9.80(h) x 1.70(d)

Table of Contents

1.Constitutive Models for Geomaterials
1.1Mathematical formulation
On the incremental behaviour of granular soils3
Micromechanical model for softening and dilatation of rock joints11
On failure criteria incorporating a scalar anisotropy parameter19
A new macroscopic approach for brittle damage: anisotropy and unilateral effect27
A constitutive model for North Sea Chalk: application to reservoir compaction and waterflooding33
Modelling principal stress rotation effects with multilaminate type constitutive models for clay41
A 3-D micromechanical modeling of anisotropic damage: microcracks closure effects and coupling with friction49
Equivalence between incremental and hypoplastic constitutive laws: pertinence of theoretical results with regard to experimental ones55
Stress-induced anisotropy in random assemblies of oval granules61
An advanced multilaminate model for clay67
A constitutive model of anisotropic behavior of soft sedimentary rock75
A constitutive model for anisotropic and strain-softening clay79
A critical review of the State Boundary Surface concept in light of advanced constitutive modelling85
1.2Experimental verification and validation
Experimental investigation of plane strain behavior of Georgia kaolin93
Anisotropy of reconstituted POKO clay99
Calibration of soil models by inverse analysis107
Comparison of two approaches for modelling anisotropy of soft clays115
Numerical implementation of a constitutive model based on interpolation between experimental data123
Prediction of soil parameters using MLPBP artificial neural network129
Importance of principal deviatoric strain increment ratios of sand135
Enhancement of data for training neural network based constitutive models for geomaterials141
2.Modelling of Instability and Strain Localization in Geomaterials
Effect of slenderness ratio on shear banding in true triaxial tests on sand149
Continuous and discrete analyses of failure in granular media155
The application of a strong-discontinuity FEM to the analysis of strain localization induced by underground openings163
Bifurcation analysis for boundary value problems involving a second gradient model171
Application of localization concepts to discontinuous water content patterns in unsaturated media179
Instability and strain localization analysis of elasto-viscoplastic normally and overconsolidated clays185
Evolution of shear localization in earth pressure problems191
Numerical analysis of toppling failures in jointed rock slopes197
3.Numerical Algorithms: Formulation and Performance
Real-time soil modeling for machine-medium interaction in virtual reality207
Numerical integration of elastoplastic constitutive equations for geomaterials with extended hardening rules213
Parallel finite element analysis of coupled problems219
Performance of different finite element families in plastic limit analyses227
Simulation of the behaviour of deep geological repositories--some computational challenges235
Finite elements with artificial intelligence241
Simulating the 3D stress-strain response of Canadian river sand via dynamic neuro-mechanistic approach247
Modelling of a footing behaviour using an Adaptive Neuro-Fuzzy Inference System253
Study of the influence of finite element mesh refinement on the calculated bearing behaviour of a piled raft259
A study of common simplifications used in three dimensional finite element analyses265
Computational aspects of a unified critical state model for clay and sand271
An implicit integration algorithm for elastoplasticity of interface element279
Adaptive neuro-fuzzy inference models for geotechnical problems285
4.Modelling of Transient, Coupled and Dynamic Problems
Numerical modeling of hydro-mechanical fracture behavior293
A coupled erosion-stress deformation model for sand production using streamline upwind finite elements301
A multiple-porosity model of contaminant transport in fractured soils311
Thermo-elastic consolidation of non-homogeneous soils by boundary elements317
Modeling of elastoplastic damage in unsaturated concrete323
Viscous boundary for transient analyses in porous media329
A stochastic approach with BEM for geotechnical analysis in earthquake engineerin337
Dynamic fracturing of hard rocks by blasting345
Computation of ground waves due to vibro-driving of piles353
5.Application of Numerical Techniques to Practical Problems
5.1Tunnels and underground structures
On a smart use of 3D-FEM in tunnelling361
Analysis of the hydration of a bentonite seal in a deep radioactive waste repository367
Fuzzy inference system for the safety evaluation and the reinforcement design of tunnel excavation373
Numerical and analytical studies of the effects of compensation grouting379
Liquefaction and dynamic FE analysis of an immersed tunnel case385
The prediction of ultimate lateral soil pressure on shallow pipelines in trench cohesive backfill393
Numerical modelling of underground structures taking into account the viscoplastic behaviour and rock damage399
5.2Foundations, piles and anchors
Weathering induced subsidence of a circular foundation407
Ultimate loads on square footings415
On spatial averaging in reliability computations of shallow foundations419
FEM modeling of embedded foundation-influence of depth on the settlement and the bearing capacity425
The undrained inclined load capacity of shallow foundations after consolidation under vertical loads431
Three-dimensional finite element analysis of combined loading of skirted foundations on non-homogeneous clay439
Finite element limit analysis of strip footings under inclined loading445
Behaviour of a footing on a partially saturated soil451
A failure surface for the bearing capacity of circular footings on saturated clays457
Dynamic soil stiffnesses for partially embedded foundations: formulation with simplified boundary differential equations463
Bearing capacity analysis of anisotropic and strain-softening clays469
Sensitivity analysis of nonlinear behaviour of laterally loaded piles475
Investigation of pile group in soft clay subjected to horizontal loading--sensitivity analysis481
Numerical analyses of a piled retaining wall--a case history487
Semi-analytical solutions for vertically loaded piles in clay/weak rocks493
Displacements of the anchored diaphragm walls during consolidation process501
Pullout capacity of circular plate anchor in clay--FE analysis507
5.3Excavations, slopes and embankments
Systematic update of a numerical model of a deep excavation using field performance data517
Numerical simulation and stress path analyses of creep behaviour in excavation problems523
Numerical analysis of deep excavations reinforced by piles529
Influence of anisotropic spatial variability on slope reliability535
SPH numerical simulation of debris flows and avalanches541
Reliability analysis of rock slopes using theory of fuzzy sets547
The effect of a kinematic yield surface on the predicted behaviour of an embankment553
Stability analysis for embankments prone to uplift induced failure561
A comparison between observed and predicted deformations of Winscar dam565
3-D SFEM based reliability analysis of a gravity dam on layered rock573
Comparison of the measured and computed performance of a propped diaphragm retaining wall in Egypt579
5.4Simulation of laboratory/field tests
Numerical modelling of scale effects in bender-based pulse tests589
Numerical interpretation of continuously cycled bender element tests595
Effect of in-situ soil properties on piezocone penetration test measurements601
Hypoplastic analysis of cone penetration in sands607
Equations of pressuremeter curve with an elastic strain-softening plastic model613
Permeability effect on pressuremeter test results619
Importance of modelling degree of saturation: The pressuremeter test627
5.5Other applications
Analysis of soil-structure interaction of towers under cyclic loading637
Seismic analysis of brick masonry walls of a power substation building643
Application of the CANAsand constitutive model to the solution of arching in cohesionless granular media649
Injection of a micro-fine cement into a porous medium: Modelling and experimentation655
Nonlinear FE-modeling of road base material661
Modeling earthquake response in deep soil deposits667
6.Miscellaneous Topics
Influence of fuzzy variability on the estimation of hydraulic conductivity of transversely isotropic geomaterials675
Settlement risk assessment: Integrating FEM and GIS681
Dependency law for thermal evolution of preconsolidation pressure687
Infiltration with density-dependent water retention and conductivity: Saturated vs. unsaturated conditions693
Modelling of interaction between a snow mantel and a flexible structure using a discrete element method699
Drying and cracking of soils: Numerical modeling705
Author index713

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