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

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Overview

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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Product Details

  • ISBN-13: 9789058093592
  • Publisher: CRC Press
  • Publication date: 10/1/1902
  • Pages: 720
  • Product dimensions: 7.00 (w) x 9.80 (h) x 1.70 (d)

Table of Contents

Preface XIII
1. Constitutive Models for Geomaterials
1.1 Mathematical formulation
On the incremental behaviour of granular soils 3
Micromechanical model for softening and dilatation of rock joints 11
On failure criteria incorporating a scalar anisotropy parameter 19
A new macroscopic approach for brittle damage: anisotropy and unilateral effect 27
A constitutive model for North Sea Chalk: application to reservoir compaction and waterflooding 33
Modelling principal stress rotation effects with multilaminate type constitutive models for clay 41
A 3-D micromechanical modeling of anisotropic damage: microcracks closure effects and coupling with friction 49
Equivalence between incremental and hypoplastic constitutive laws: pertinence of theoretical results with regard to experimental ones 55
Stress-induced anisotropy in random assemblies of oval granules 61
An advanced multilaminate model for clay 67
A constitutive model of anisotropic behavior of soft sedimentary rock 75
A constitutive model for anisotropic and strain-softening clay 79
A critical review of the State Boundary Surface concept in light of advanced constitutive modelling 85
1.2 Experimental verification and validation
Experimental investigation of plane strain behavior of Georgia kaolin 93
Anisotropy of reconstituted POKO clay 99
Calibration of soil models by inverse analysis 107
Comparison of two approaches for modelling anisotropy of soft clays 115
Numerical implementation of a constitutive model based on interpolation between experimental data 123
Prediction of soil parameters using MLPBP artificial neural network 129
Importance of principal deviatoric strain increment ratios of sand 135
Enhancement of data for training neural network based constitutive models for geomaterials 141
2. Modelling of Instability and Strain Localization in Geomaterials
Effect of slenderness ratio on shear banding in true triaxial tests on sand 149
Continuous and discrete analyses of failure in granular media 155
The application of a strong-discontinuity FEM to the analysis of strain localization induced by underground openings 163
Bifurcation analysis for boundary value problems involving a second gradient model 171
Application of localization concepts to discontinuous water content patterns in unsaturated media 179
Instability and strain localization analysis of elasto-viscoplastic normally and overconsolidated clays 185
Evolution of shear localization in earth pressure problems 191
Numerical analysis of toppling failures in jointed rock slopes 197
3. Numerical Algorithms: Formulation and Performance
Real-time soil modeling for machine-medium interaction in virtual reality 207
Numerical integration of elastoplastic constitutive equations for geomaterials with extended hardening rules 213
Parallel finite element analysis of coupled problems 219
Performance of different finite element families in plastic limit analyses 227
Simulation of the behaviour of deep geological repositories--some computational challenges 235
Finite elements with artificial intelligence 241
Simulating the 3D stress-strain response of Canadian river sand via dynamic neuro-mechanistic approach 247
Modelling of a footing behaviour using an Adaptive Neuro-Fuzzy Inference System 253
Study of the influence of finite element mesh refinement on the calculated bearing behaviour of a piled raft 259
A study of common simplifications used in three dimensional finite element analyses 265
Computational aspects of a unified critical state model for clay and sand 271
An implicit integration algorithm for elastoplasticity of interface element 279
Adaptive neuro-fuzzy inference models for geotechnical problems 285
4. Modelling of Transient, Coupled and Dynamic Problems
Numerical modeling of hydro-mechanical fracture behavior 293
A coupled erosion-stress deformation model for sand production using streamline upwind finite elements 301
A multiple-porosity model of contaminant transport in fractured soils 311
Thermo-elastic consolidation of non-homogeneous soils by boundary elements 317
Modeling of elastoplastic damage in unsaturated concrete 323
Viscous boundary for transient analyses in porous media 329
A stochastic approach with BEM for geotechnical analysis in earthquake engineerin 337
Dynamic fracturing of hard rocks by blasting 345
Computation of ground waves due to vibro-driving of piles 353
5. Application of Numerical Techniques to Practical Problems
5.1 Tunnels and underground structures
On a smart use of 3D-FEM in tunnelling 361
Analysis of the hydration of a bentonite seal in a deep radioactive waste repository 367
Fuzzy inference system for the safety evaluation and the reinforcement design of tunnel excavation 373
Numerical and analytical studies of the effects of compensation grouting 379
Liquefaction and dynamic FE analysis of an immersed tunnel case 385
The prediction of ultimate lateral soil pressure on shallow pipelines in trench cohesive backfill 393
Numerical modelling of underground structures taking into account the viscoplastic behaviour and rock damage 399
5.2 Foundations, piles and anchors
Weathering induced subsidence of a circular foundation 407
Ultimate loads on square footings 415
On spatial averaging in reliability computations of shallow foundations 419
FEM modeling of embedded foundation-influence of depth on the settlement and the bearing capacity 425
The undrained inclined load capacity of shallow foundations after consolidation under vertical loads 431
Three-dimensional finite element analysis of combined loading of skirted foundations on non-homogeneous clay 439
Finite element limit analysis of strip footings under inclined loading 445
Behaviour of a footing on a partially saturated soil 451
A failure surface for the bearing capacity of circular footings on saturated clays 457
Dynamic soil stiffnesses for partially embedded foundations: formulation with simplified boundary differential equations 463
Bearing capacity analysis of anisotropic and strain-softening clays 469
Sensitivity analysis of nonlinear behaviour of laterally loaded piles 475
Investigation of pile group in soft clay subjected to horizontal loading--sensitivity analysis 481
Numerical analyses of a piled retaining wall--a case history 487
Semi-analytical solutions for vertically loaded piles in clay/weak rocks 493
Displacements of the anchored diaphragm walls during consolidation process 501
Pullout capacity of circular plate anchor in clay--FE analysis 507
5.3 Excavations, slopes and embankments
Systematic update of a numerical model of a deep excavation using field performance data 517
Numerical simulation and stress path analyses of creep behaviour in excavation problems 523
Numerical analysis of deep excavations reinforced by piles 529
Influence of anisotropic spatial variability on slope reliability 535
SPH numerical simulation of debris flows and avalanches 541
Reliability analysis of rock slopes using theory of fuzzy sets 547
The effect of a kinematic yield surface on the predicted behaviour of an embankment 553
Stability analysis for embankments prone to uplift induced failure 561
A comparison between observed and predicted deformations of Winscar dam 565
3-D SFEM based reliability analysis of a gravity dam on layered rock 573
Comparison of the measured and computed performance of a propped diaphragm retaining wall in Egypt 579
5.4 Simulation of laboratory/field tests
Numerical modelling of scale effects in bender-based pulse tests 589
Numerical interpretation of continuously cycled bender element tests 595
Effect of in-situ soil properties on piezocone penetration test measurements 601
Hypoplastic analysis of cone penetration in sands 607
Equations of pressuremeter curve with an elastic strain-softening plastic model 613
Permeability effect on pressuremeter test results 619
Importance of modelling degree of saturation: The pressuremeter test 627
5.5 Other applications
Analysis of soil-structure interaction of towers under cyclic loading 637
Seismic analysis of brick masonry walls of a power substation building 643
Application of the CANAsand constitutive model to the solution of arching in cohesionless granular media 649
Injection of a micro-fine cement into a porous medium: Modelling and experimentation 655
Nonlinear FE-modeling of road base material 661
Modeling earthquake response in deep soil deposits 667
6. Miscellaneous Topics
Influence of fuzzy variability on the estimation of hydraulic conductivity of transversely isotropic geomaterials 675
Settlement risk assessment: Integrating FEM and GIS 681
Dependency law for thermal evolution of preconsolidation pressure 687
Infiltration with density-dependent water retention and conductivity: Saturated vs. unsaturated conditions 693
Modelling of interaction between a snow mantel and a flexible structure using a discrete element method 699
Drying and cracking of soils: Numerical modeling 705
Author index 713
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