Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Soil behaviour"”.
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Enhancement of the Brick constitutive model to incorporate viscous soil behaviour
… advanced elasto-plastic constitutive model for soils and has become a recognised tool for modelling ground behaviour, following its implementation into the finite element program Safe. The model can reproduce many essential elements of soil behaviour, which is viewed from a strain-based …
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Investigating the Dynamic Soil Behaviour of Cape Flat Sands Under Earthquake Cyclic Loading
… are surrounded by partially or unsaturated soils, which can greatly affect their dynamic properties, such as shear modulus and damping ratio. Therefore, this necessitates an inclusive methodology to consider and incorporate the degree of saturation in seismic analyses to ensure that seismic …
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Computer program development for the analysis of inelastic beam and soil behaviour in geotechnical design
… problems based on the principles of beam-soil interaction where the beam is supported by a single or two-layer soil system. In 1867, a foundation model was proposed by Winkler in which the elastic foundation beneath a horizontal beam could be viewed as a series of independent springs. …
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Microscale Investigation of the Influence of Interparticle Cohesion on the Macro-Behaviour of Soil
… on understanding the micro-mechanisms governing soil behaviour in recent years, particularly through advanced computational methods such as discrete element method (DEM), cohesive interactions between soil particles are often neglected and simplified. This thesis aims to address this critical gap …
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Modelling the effect of recent stress history on the deformation of overconsolidated soils
The aim of the research was to study the behaviour of overconsolidated 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 …
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The effects of multi-directional loading on soil liquefaction
… the influence of multi-directional shearing on soil behaviour, especially the undrained behaviour of saturated sands, remains one of the least understood areas in geotechnics. This study developed a new test database on Hostun sand with the modified multi-directional simple shear testing …
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Some applications of Cam-clay in numerical analysis
… the relative importance of the critical state soil parameters and streis history on the calculated soil behaviour. The values of these parameters covered the range of most commonly occurring natural soils. The investigation was extended to finite element modelling of plate loading tests using …
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Image-Based Geotechnical Constitutive Model Parameter Calibration
… parameters that are required to simulate soil behaviour through appropriately simplified mathematical models, commonly known as constitutive models. Conventional "element" tests (e.g. triaxial, simple shear) typically assume a homogeneous deformation response in a sample subject to …
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Interação solo-estaca de plataformas offshore
Winkler springs are used to represent soil in the Structural Analysis of Offshore Platforms. The soil characteristics for the non-linear soil behaviour are obtained from laboratory tests or using full scale loaded piles. The API Code through the "P-Y" curves, defines the stress-strain 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
Accurate prediction of soil behaviour around tunnel excavations is vital for the assessment of its effects on existing infrastructures and services, both underground and surface, and evaluation of risks to enable safe designs. This thesis evaluates the capabilities of four constitutive models in …
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The determination of soil parameters for design from stress path tests
… elastic deformation properties of an anisotropic soil within the context of critical state soil mechanics. The soil tested is a heavily overconsolidated Gault Clay. Laboratory triaxial testing on 38 mm samples is used to measure and soil 100 mm diameter stiffness. A microcomputer-based control …
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Scale effects in tests on footings
… into the flat surface of a cylindrical soil model either under 1-g (gravity) with surcharge or under elevated g in a centrifuge. The 1-g and centrifuge test series were used to study the scale effects on the surcharge term Ng and the self-weight term Nγ of the Terzaghi bearing capacity …
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Behaviour of model foundations on sand
… aim of the present research is to examine the behaviour of foundation/sand interaction under load at a pre-failure stage generally known as "Serviceability". The semi-full scale foundation used is a purpose designed bolted steel box, instrumented to measure contact stresses and displacements at …
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The behaviour of a structurally complex clay from an Italian landslide
This thesis looks at the behaviour of a structurally complex clay formation from a landslide site in the Southern Italian Apennines. The argille scagliose or scaly clays which form the greater part of the argillaceous component of the geological sequence consist of small shear lenses (or scales) of …
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Stress disturbance on the cyclic behavior of soils and its impact on geotechnical structures
… The excavation changes the stress state in soils along different stress paths and affects the deformation behavior of soils under cyclic loading. To study the impact of stress disturbance on soil behaviour under cyclic loading, a large number of cyclic triaxial tests were carried out to …
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Centrifuge modelling of the behaviour of geosynthetic-reinforced soils above voids
Understanding the deformation mechanisms of soils and geosynthetics in response to the formation of a void below a geosynthetic-reinforced soil is crucial to provide efficient designs of geosynthetic-reinforced soil systems such as embankments and landfill liners. Centrifuge modelling of the soil …
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