Deformation Characteristics of Geomaterials / Comportement Des Sols Et Des Roches Tendres

H. Di Benedetto, T. Doanh, H. Geoffroy, C. Sauzeat

• Foreword; Introduction; Organisation; Measurement of material damping with bender elements in triaxial cell; Applications of multistation surface wave testing; An innovative facility to measure shear-wave velocity in centrifuge and 1-g models; Development of measuring method for axial and lateral strain distribution using CCD sensor in triaxial test; Monitoring displacement distribution within the rock mass during a plate load test; Characterization of deformation process of CPT using X-ray TV imaging technique; Sample disturbance of soft organic Oostvaardersplassen clay; A non-resonance method for dynamic soil properties; Linear dynamic properties of sandy and gravelly soils from large-scale resonant tests; Automating Gmax measurement in triaxial tests; Derived stress-strain-strength of clays from seismic cone tests; Ageing of remoulded soils used in geotechnical centrifuge modelling; A fundamental study on the strength measured by in-situ rock shear tests; Experimental characterization of multi-directional cyclic p-y response of soft clay; Microscopic observation of shear behavior of granular material; Behaviour of a tropical residual soil; Interpretation of side-mounted bender element results using phase shift and group velocity; A new temperature controlled triaxial apparatus; Identification et prevision du gonflement des sols expansifs; Stiffness of Onsoy clay; Continuous loading oedometer testing on three Swiss lacustrine clays; Cyclic deformation characteristics of cemented calcareous soil; Multi scale analysis of the shear behaviour of soil-inclusion interfaces; Effects of fabric anisotropy and stress condition on small strain stiffness of sands; Change in microstructure of Pleistocene clays due to one-dimensional consolidation; Judging fabric bonding of natural sedimentary clay; Evaluation of deformation modulus of clay at small strains based on isotropic elasticity; Experimental behaviour of Parco del Cilento silty sand under different loading histories; Sand-structure interface behaviour under cyclic loading from constant normal stiffness direct shear tests; Frictional behaviour between clay and steel by direct shear type apparatus; Cyclic triaxial tests on residual deformation and small strain properties of soft rocks; A comparative study on shear modulus and damping ratio of cohesive soil from laboratory tests; Small strain stiffness from in situ and laboratory tests for the city of Noto soil; Modelling quasi-elastic deformation properties of sand; The anisotropy of Leighton Buzzard sand under general stress conditions; Resilient modulus of hydraulic mechanically stabilized slag base-course material; Variation of experimental results of oedometer testing due to the changes of pore fluid; Anisotropic deformation properties of dense granular soils by large-scale true triaxial tests; Small-strain stiffness anisotropy: relationship between continuum model and micromechanics model; Effect of average straining rate on shear modulus at small cyclic strains; Small strain behaviour of a lime-treated silty sand; Influence of compaction variables on the small strain behaviour of a clayey silt; Permanent deformation behavior of airport pavement granular layers; Dynamic and cyclic loadings on sands: results and modelling for general stress-strain conditions; Effect of strain rate on the behaviour of dry sand; Stiffness and damping parameters for I D non-linear seismic response analysis; Comparison of shear wave velocity measurements in different materials using time and frequency domain techniques; A study on skin friction properties of SIP by direct shear tests; On the resilient modulus and permanent deformation characteristics of stabilized recycled aggregates; Shear modulus and damping of natural sands; A study of the effect of wave velocity on solubility of limestone and chalk; Stress-strain relationship for weak rocks; Laboratory characterization of Hostun RF sand at very low confining stresses; Time-dependent stress-strain behavior of natural soft clay; Effect of simultaneous consolidation and creep on interpretation of test results; Strength and deformation characteristics of a saturated residual soil profile; The dilatant behaviour of overconsolidated clays; Stress-dilatancy relationship of various granular materials obtained by the newly developed in-situ direct shear tests; The omnipresence of localizations in particulate materials; Some factors affecting deformation and strength of coal ash; Quantitative assessment of thermal acceleration of time effects in one-dimensional compression of clays; Pre-failure behaviour of a sandstone residual soil; Experimental investigation and constitutive modelling of pre-failure deformation of a very densely compacted gravel; Basic research on mechanism of the residual strength of clay; Effect of K0-condition on liquefaction characteristics of saturated sand; Effect of anisotropy on drained and undrained shear behavior of in-situ sandy soils; Undrained monotonic and cyclic behaviour of a coarse sand from undisturbed and reconstituted samples; Normalization of stress-strain relationship for aged and cemented natural clay; Impact du temps de vieillissement sur les caracteristiques rheologiques et physico mecaniques des ciments alleges destines a Ia cimentation petroliere; Estimation du comportement mecanique de formations superficielles instables; Significance of viscous effects in the development of residual strain in cyclic triaxial tests on sand; Viscous effects coupled with ageing effects on the stress-strain behaviour of cement-mixed gravel; Viscous stress-strain properties of undisturbed Pleistocene clay and its constitutive modelling; Residual deformations by creep and cyclic loading of reinforced-gravel backfill and their relation; Shear banding characteristics in plane strain compression of granular materials; Shear banding characteristics of granular materials and particle size effects on the seismic stability of earth structures; Viscous stress-strain behaviour of clay under unloaded conditions; Effects of ageing and viscosity on the stress-strain behaviour of cement-mixed soft clay; Strength and deformation characteristics of cement-mixed gravel for engineering use; Viscous effects on the shear yielding characteristics of sand and its modelling; Experimental study of sand behaviour at low stresses; Strength and stress-strain behaviour of saprolitic granite soils from Guarda- sampling effects; Modelling in triaxial cells of the behavior of a soil of a retaining structure; Shear characteristics of the reconsolidated clay remolded under low water content; Strength characteristics of cement-mixed gravel evaluated by large triaxial compression tests; Pre-failure behaviour of the tropical clay soils of Dhaka, Bangladesh; Effect of water on particle breakage for decomposed granite soils; Effect of particle characteristics on drained shear properties of sand; Effects of structural bonding and particle physical property on one-dimensional compression behaviour of bonded granular geomaterials; The role of fines in the flow deformation and liquefaction of a volcanic soil Shirasu; The effects of stress path history on the undrained behavior of saturated loose sands; Strain localization extent in sand under drained triaxial tests; Deformation behaviour of anisotropic and isotropic compacted soils due to wetting; Evaluation of the macrostructure influence on compressibility tests results; The effects of total stress path's direction on stress-strain-strength characteristics of soft marine Bangkok clay; Assessment of mechanical behaviour of rockfill materials using triaxial and direct shear tests; An experimental investigation of creep processes in a crushable sand; Experimental study of the mechanical behavior of plastic concrete by triaxial apparatus; Behavior of loose sand at very high strain rates; Progressive failure and scale effect of anchor problem in two-layered sand; Prediction of deformation of soft rock foundations for embankment dams considering nonlinear deformability; Deformation behavior of structure-sand deposits subjected to cyclic loading and FE analysis; Ultimate bearing capacity of shallow foundations and contained yielded zone; Laboratory test of bearing capacity of model pile with nodes; A field study of induced slope failure in poorly cemented rock; Dynamic behavior of railroad ballast in shaking table tests; Stiffness values and deformation behaviour of soil for the settlement analysis of foundation; Behaviour of near-saturated soils under cyclic wave loading; Three-dimensional consolidation of clay ground improved by vertical drain; Implementation of a time-dependent constitutive model TESRA into the nonlinear FEM scheme; Class A footing response prediction from seismic cone tests; Estimation of the horizontal resistance of a rubble mound based on the results of an inverse analysis with in-situ loading tests on piles; Horizontal loading of piles: comparative study of P-Y curves-based methods; Several considerations on a two-dimensional consolidation inverse analysis; Seismic 3-D effective stress analysis: constitutive modelling and application; Symmetry breaking bifurcation in various soils under shear; Modelling deformation of thawing soil under vehicle loading; Three-dimensional finite element analysis of footing resting on sand; Stability of rock slopes in complex rock formation: Determination des modules de deformation des sols a partir d'un essai en place avec un penetrometre; Influence of sample geometry on shear wave propagation using bender elements; Elasto-plastic finite element computations for a model of L-type retaining wall 969; Characteristics of settlement and bearing capacity of ground improved by granular pile; A comparison between observed and predicted behaviour of a deep excavation in soft Bangkok clay; Strength and compressibility behavior of composite geomaterial developed for application as retaining wall backfill inclusions; Multiscale modelling of mechanical behaviour of a tree subjected to a rock impact; Neural network based prediction of silty sands behavior; Experimentation and modelling of unsaturated soils behaviour in non-isothermal conditions; An illustrative model for assessing the influence of elastic non-linearity on the residual behaviour of a platform subject to traffic loading; Cyclic behaviour of soils, a prediction of permanent deformations; Bifurcation analysis on soil specimens exhibiting diffuse deformation modes and localized slip planes; Application of time-dependent model in tunnelling; Simplified method based on plasticity for the permanent strains of unbound granular materials for flexible pavements; Validation of an elastoplastic model to predict secant shear modulus of natural soils by experimental results; Application of fractal dimensions to examine the frictional behavior of granular materials; Discrete numerical simulation, quasistatic deformation and the origins of strain in granular materials; A thermomechanical model for clays; Shear behavior of sand under cyclic loading in general stress systems; Numerical analysis on liquefaction-induced progressive deformation with a pore water migration; A simple constitutive model of sand based on strain-path controlled tests II; Bounding surface formulation of a unified critical state model for clay and sand; An elasto-plastic constitutive model at the overall strain ranges (10-4 to I 0%) for weathered soils; New strain energy hardening functions for sand based on the double yielding concept; A framework for modelling of the time effects on the stress-strain behaviour of geomaterials; Use of Generalized Plasticity to describe the behaviour of a wide class of non-active natural soils; A Cam clay-type model for structured soils; Application of Mohr-Coulomb yielding criterion; Non-linear deformation behavior of granular materials by Elliptic Microstructure Model; Influence of particles shape on the macroscopic behavior of granular material; Identification of an elastoplastic model parameters using laboratory and in-situ tests; Unidirectional non-linear stress-strain relationship for sand; A rheological model for the viscous behaviour of sand; Anisotropic effects in hypoplasticity; Methods to calculate strain in discrete element modelling; A numerical study of shear band formation in anisotropic sand; Simplifications related to dynamic measurements of anisotropic G0; Particulate mechanics considerations as an aid in understanding the mechanical behaviour of geomaterials; A simple model of shear stress-shear strain relationship for liquefied dense sand; A new constitutive relation for rock joints calibrated by means of a discrete element method; Modelling of mechanical behaviour of a coarse soil subjected to rock impact using a discrete element method; A general framework for constitutive models adaptation to unsaturated states; Observational approach for settlement predictions; Settlement control for railway's roadbed foundation using soilbags; Modelling anisotropic deformation characteristics of gravelly layer in Hualien, Taiwan; Normalization of displacement rate for roughly predicting time to failure in rock slope; Anisotropy in bearing capacity-lateral deformation behavior of sand ground; Soil properties and site characterization through Rayleigh waves; Aging effect of sandy soils on liquefaction strength; Stress-strain behaviors of soil under construction; Shear-wave velocities from multi-station analysis of surface wave; Modelling of track foundation behaviour at Zig Zag tunnels near Lithgow, NSW; Long-term residual deformation of prototype geotextile-reinforced gravel structures; Compression characteristics of stiff clay to support a bridge foundation evaluated by field and laboratory tests; In-situ response of asphalt pavement under moving load; Dynamic response of saturated dense sand in laminated centrifuge container; Interpreting the Camastra dam behaviour in 40 years of operation; Stress-strain relationships study on different stress path for intermediary Bucharest clay; Evaluating soil nonlinearity from vertical array seismic records at site with anisotropy; A case study on the reduction of settlement caused by compaction grouting system; Lateral load behaviour of pile and pile groups in soft clays; Author index