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Showing 1 to 20 of 33 for “"STRESS PATH"”.
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Conventional and non-conventional stress path testing of Maguga clay
Bibliography: leaves 93-94.
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The determination of soil parameters for design from stress path tests
… hydraulically-operated triaxial cells to enable stress path testing, and this is described. The axial and radial stresses and the back pressure can be varied independently to produce any desired stress path. A method of measurement of anisotropic of loading stiffness is developed using various …
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An experimental study of the time-dependent undrained shear behavior of resedimented clay using automated stress path triaxial equipment
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1991.
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Investigations of threshold effects in soil deformations
… affecting soil stiffness are identified as the stress history of samples, the current stress state and the current stress path. The effect of sample disturbance is to reduce measured stiffnesses, opinion has in the past attributed the differences in stiffness to this factor. However this is not …
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Permanent Deformation Behavior of Airport Flexible Pavement Base and Subbase Courses
… following a wander pattern. Realistic pavement stresses induced by moving wheel loads were examined in the unbound aggregate base and subbase layers and the important effects of rotation of principal stress axes were indicated for a proper characterization of the permanent deformation behavior. …
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Stress paths and collapsing soils
… stage of the design would be to consider the stress changes at either an average point or a grid of points below the footing within the soil mass. To do this the engineer makes use of conventional methods of analysis. Factors such as horizontal strata and variations of properties with depth …
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Determinação dos parâmetros "elásticos" do solo residual compactado da barragem de Itauba
Analysis of the stress-strain formulation proposed in 1974 by Corotis, Krizek and Farzin. This formulation is applied mostly to problems in which the principal total stresses (σ1, σ3) increase simultaneously mantaining its ratio constant (σ3/σ1=constant); in another words: it includes the total …
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Modelling the effect of recent stress history on the deformation of overconsolidated soils
… soils subjected to small changes of strain or stress appropriate to the investigation of ground movements around excavations, retaining walls or foundations, and to develop a constitutive soil model that can predict such behaviour. The principal feature of soil behaviour investigated was the …
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Συμβολή στην ανάλυση των εκσκαφών με την μέθοδο των πεπερασμένων στοιχείων
… MATERIAL BEHAVIOR OF COMPUTING DISPLACEMENTS AND STRESSES AS IF THE EXCAVATION WERECOMPLETED IN A SINGLE STAGE DOES NOT ACCOUNT FOR PATH DEPENDENCY AND NONLINEARITY INTRODUCED BY INCREMENTAL EXCAVATION. THE OBJECTIVE OF THIS PAPER IS TO PROPOSE AN EFFICIENT, FINITE ELEMENT BASED, NUMERICAL …
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Development of a constitutive model for a heaving clay from Rosebank
… differ due to the influence of different test stress paths on the results. More detailed examination of the effect of test stress path on the volume of heaving clays was therefore required to resolve the reasons for the differences in the test results, and to give a fuller understanding of the …
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Characterization of Anisotropic Granular Layer Behavior in Flexible Pavements
… material type, gradation, moisture content, and stress levels affecting the resilient behavior. Finally, the new testing protocol and analytical solution technique have been developed to determine the cross-anisotropic material properties of unbound granular materials under stress path testing to …
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Seismic Response and Liquefaction of Saturated Sands
… skeleton and the pore water. An elasto-plastic stress-strain rule is developed to simulate the behavior of soils under cyclic stresses. A two part stress path model is used to define the relationship between effective stresses and the cyclic shear stresses. The first part of the model simulates …
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The behaviour of clay in simple shear and triaxial tests
… standard shear box arid computer controlled stress path testing equipment for samples with38 mm and 100 mm diameter. The test programme comprised simple shear and shear box tests on remouled, reconstituted and undisturbed samples of Cowden till and London clay, undrained triaxial tests on …
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Resistência ao cisalhamento de solos compactados: uma proposta de tipificação
… of designed and/or constructed Brazilian dams. Stress-strain, pore-pression deformation, and efective stress path curves are analysed and as a result some typical soil behaviors were identified as a function of the plots. These behaviors are then associated with such factors as type of soil, …
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Evaluating the capabilities of some constitutive models in reproducing the experimental behaviour of stiff clay subjected to tunnelling stress paths
… stiff clay when subjected to tunnelling-induced stress paths. Relevant stress paths have been determined from 2D and 3D finite element analysis using PLAXIS. Reconstituted Speswhite Kaolin clay specimens have been prepared from slurry, their properties investigated in detail, and tested using …
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Small strain stiffness of fine grained soils
… in two computer controlled hydraulic stress path cells so that it was possible to measure the very small strain stiffness of the soil at' any stage of a triaxial stress path test and compare it directly to shear nioduli obtained at larger strain levels. The electronics required to run …
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Swelling behaviour of unsaturated fine grained soils
… of various laboratory tests such as a 100 mm stress path triaxial cell and a computer controlled oedometer. Centrifuge modelling was used as a link between the laboratory tests performed and an existing prototype experimental wall. Three types of soils with different plasticity have been …
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Geotechnical characterization of sediments from Hydrate Ridge, Cascadia Continental Margin
… Margin with the goal of understanding the stress history, consolidation behavior and strength characteristics of the soil. A series of Constant Rate of Strain Consolidation (CRSC) and Ko- Consolidated Undrained triaxial (CKoU) tests were performed in order to study the behavior. In …
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Adapting The Modified Cam Clay Constitutive Model To The Computational Analysis Of Dense Granular Soils
… of dense sands to analyze the accuracy of the stress-strain behavior. This analysis is based on triaxial test data applied to remolded and compacted sand samples under drained conditions. The laboratory triaxial tests were performed by the Florida Department of Transportation to research the …
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Effects of anisotropy on the behaviour of unsaturated compacted clay
… an isotropic structure inherited from previous stress history. The samples were prepared using aggregated kaolin prepared at 25% moisture content and subsequently compressed isotropically in a large triaxial cell. The pressure required to compress the samples isotropically in the large triaxial …
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