Exploració per autor "Arroyo Alvarez de Toledo, Marcos"
Ara es mostren els items 62-81 de 151
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G-PFEM numerical assessment of screw pile undrained capacity
(University of Dundee, 2019)
Text en actes de congrés
Accés obertThis contribution describes a preliminary parametric analysis of the factors affecting the pull-out resistance of screw-piles in undrained conditions. The numerical simulations rely on the Particle Finite Element method, ... -
G-PFEM: an open access numerical tool for the simulation of spudcan penetration in clays
(2022)
Text en actes de congrés
Accés restringit per política de l'editorialPenetration depth of Spudcan foundations for offshore mobile Jack-up rigs is typically predicted by considering a wished-in-place foundation at different depths and following traditional bearing capacity approaches. However, ... -
Geotechnical particle finite element method for modeling of soil-structure interaction under large deformation conditions
(Science Press, 2022-06)
Article
Accés obertThe possibilities of the particle finite element method (PFEM) for modeling geotechnical problems are increasingly evident. PFEM is a numerical approach to solve large displacement and large strain continuum problems that ... -
Grading evolution and critical state in a discrete numerical model of Fontainebleau sand
(Thomas Telford, 2019-01)
Article
Accés obertGranular materials reach critical states upon shearing. The position and shape of a critical state line (CSL) in the compression plane are important for constitutive models, interpretation of in situ tests and liquefaction ... -
Grain roughness effect on the critical state line of crushable sands
(University of Dundee, 2021)
Text en actes de congrés
Accés obertA recently proposed DEM model for materials with rough crushable grains (Zhang et al. 2021; Ciantia et al. 2015; Otsubo et al. 2017) is here employed to examine the effect of contact roughness on the critical state line, ... -
High resolution incremental stress testing of crushable granular materials
(EDP Sciences, 2019)
Text en actes de congrés
Accés obertThe incremental behaviour of crushable sands is investigated by means of a Discrete Element Method (DEM) based analogue. The DEM sample is subjected to a comprehensive set of small stress perturbations in the triaxial plane ... -
Homogeneity and symmetry in DEM models of cone penetration
(American Institute of Physics (AIP), 2009)
Text en actes de congrés
Accés restringit per política de l'editorialA three—dimensional numerical model was implemented to PFC3D Code to simulate cone penetration test in Ticino sand in a calibration chamber. The model is calibrated using laboratory test results. The full/half/quarter ... -
Hydraulic conductivity from piezocone on-the-fly: a numerical evaluation
(Institution of Civil Engineers (ICE), 2018-12)
Article
Accés obertPermeability is important in many geotechnical applications. The current CPTu practice to obtain permeability values relies on dissipation tests, which are frequently slow and only linked to permeability through compressibility ... -
Image-based calibration of rolling resistance in discrete element models of sand
(Elsevier, 2021-03)
Article
Accés obertModels that introduce rolling resistance at the contact are widely employed in simulations using the discrete element method (DEM) to indirectly represent particle shape effects. This approach offers substantial computational ... -
Impact of colloidal silica treatment on an earthfill dam
(American Society of Civil Engineers (ASCE), 2022)
Comunicació de congrés
Accés restringit per política de l'editorialThe impact of the use of sand treated with Colloidal Silica (CS) on a model 80 m high-earthfill dam was assessed through numerical modelling. The hydro-mechanical properties of the CS-Treated soil were taken from a previous ... -
Impermeable membranes for slab-track settlement mitigation
(2018-08)
Article
Accés obertA series of numerical simulations is used to explore the effect of the geometrical disposition of impermeable membranes in the overall performance of slab-track railway earthworks, with particular reference to the generation ... -
Incorporating surface roughness into DEM models of crushable soils
(ITASCA Consulting Group, 2020)
Text en actes de congrés
Accés restringit per política de l'editorialOne obvious characteristic of granular grains is that their surface is not smooth, especially when observed at smaller scales. Some advanced experiment imaging methods such as optical interferometry, scanning electron ... -
Influence of some EPB operation parameters on ground movements
(AEDIFICATIO PUBLISHERS, 2009)
Text en actes de congrés
Accés restringit per política de l'editorialSome of the details of EPB tunnelling are difficult to introduce in conventional numerical models, nevertheless there are some parameters that can be included in the analyses in a fairly easy way. The EPB operating ... -
Influence of the particle size distribution on the Critical State Properties of Mine Tailings
(University of British Columbia (UBC), 2022)
Text en actes de congrés
Accés obertArguably, critical state soil mechanics (CSSM) is now the preeminent methodology for understanding static liquefaction of mine tailings, having been used in the mining industry by the expert panels retained to investigate ... -
Integration of elasto-plastic constitutive models infinite deformation: an explicit approach
(CIMNE, 2015)
Text en actes de congrés
Accés obertThis paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where ... -
Irreversible behaviour of crushable sands: a DEM study
(2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe irreversible behaviour of crushable sands is investigated by means of a Discrete Element Method (DEM) analogue. The calculations have been performed using a recently developed procedure to simulate particle crushing ... -
La rotura de la presa de relaves de Brumadinho: la montaña de cristal
(2022)
Text en actes de congrés
Accés restringit per política de l'editorialEn Enero de 2019 en Brumadinho (Brasil) una presa de relaves mineros de gran tamaño colapsó en su totalidad de forma brusca, causando la muerte a 270 personas y una gran conmoción en la minería mundial. La rotura fue ... -
Large-strain analysis of undrained smooth tube sampling
(Thomas Telford, 2022-01)
Article
Accés obertBorehole tube sampling is a key process of geotechnical engineering. The paper presents numerical analyses of smooth tube sampling in clay using the Particle Finite Element Method (PFEM). The soil is described by a ... -
Linking shape and rotation of grains during triaxial compression of sand
(2020-11)
Article
Accés obertParticle shape has a strong effect on the mechanical response of coarse soils. This has been usually observed examining specimen-scale or engineering-scale responses, which are the sum of many microscale interactions. In ... -
Low-order stabilized finite element for the full Biot formulation in soil mechanics at finite strain
(2019-05)
Article
Accés obertThis article presents a novel finite element formulation for the Biot equation using low-order elements. Additionally, an extra degree of freedom is introduced to treat the volumetric locking steaming from the effective ...
