Exploració per autor "Arroyo Alvarez de Toledo, Marcos"
Ara es mostren els items 70-89 de 151
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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 ... -
Macroelement modeling of SSI effects on offshore wind turbines subject to large number of loading cycles
(Elsevier, 2016)
Text en actes de congrés
Accés obertIn this paper, the hypoplastic macroelement formulation proposed by [1] has been modified in order to extend its range of applicability to offshore structures subject to cyclic loads with very high number of cycles, with ... -
Management of third-party risk in an urban deep excavation project
(IOS Press, 2007)
Text en actes de congrés
Accés restringit per política de l'editorialThis communication presents results from a case history in Barcelona involving a large cut-and-cover railway tunnel requiring a deep excavation (H > 20 m). The presence of a number of medium to high-rise buildings alongside ... -
Mapping deformation during CPT in a virtual calibration chamber
(CRC Press/Balkema, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper analyses results from a three dimensional discrete element method simulation of the cone penetration test in a "Virtual Calibration Chamber" (VCC). The deformation patterns in the soil adjacent to the cone ... -
Marchetti flat dilatometer tests in a virtual calibration chamber
(2018-09)
Article
Accés obertCalibration chambers are frequently used to verify, adapt, or both verify and adapt empirical relations between different state variables and in situ test results. Virtual calibration chambers (VCC) built with 3D discrete ... -
Mechanical and Thermal DEM analyses of baled MSW storage
(International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialMunicipal solid waste is sometimes stored in baled form either before or after treatment. General design requirements for MSW landfills, such as slope stability and lining long-term integrity are still relevant for bale ... -
Micromechanical inspection of incremental behaviour of crushable soils
(Springer, 2019-10)
Article
Accés obertIn granular soils grain crushing reduces dilatancy and stress obliquity enhances crushability. These are well-supported specimen-scale experimental observations. In principle, those observations should reflect some peculiar ... -
Microscopic calibration of rolling friction to mimic particle shape effects in DEM
(CIMNE, 2019)
Text en actes de congrés
Accés obertIt is widely recognised that particle shape influences the mechanical response of granular materials [1-2]. Rolling resistance elasto-plastic contact models are frequently used to approximate particle shape effects in ... -
Microscopic calibration of rolling friction to mimic particle shape effects in DEM
(ITASCA Consulting Group, 2020)
Text en actes de congrés
Accés restringit per política de l'editorialMuch work has been done to characterize granular shape and to understand its influence on overall soil behavior. Thus, Wadell (Wadell 1932) introduced the concept of “sphericity” that quantifies how a particle differs from ...
