Ara es mostren els items 1-20 de 150

    • 3D DEM simulations of CPT in sand 

      Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The paper contains an overview of the results obtained in a research project exploring the ability of 3D DEM models to reproduce cone penetration in sands. The sand whose behaviour is mimicked by the discrete material ...
    • A contact model for rough crushable sand 

      Zhang, Ningning; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2021-06)
      Article
      Accés obert
      Sand roughness is now accessible to measurement. Incorporating this parameter into sand models using the discrete element method (DEM) is known to improve bulk small strain response. In this work we explore the effect on ...
    • A new approach to evaluate the soil disturbance due to tube sampling 

      Gens Solé, Antonio; Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria (2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Disturbance of specimens recovered by tube sampling from boreholes is an enduring relevant problem in geotechnical engineering. Practice has evolved slowly in this area, partly because the main research method applied, ...
    • A new efficient strategy to simulate particle breakage in DEM analyses 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The discrete element method (DEM) is increasingly gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
    • A new strategy to simulate particle crushing in DEM analysis 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Text en actes de congrés
      Accés obert
      The discrete element method (DEM) is progressively gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
    • A nonlocal elasto-plastic model for structured soils at large strains for the particle finite element method 

      Monforte Vila, Lluís; Ciantia, Matteo Oryem; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Springer, 2021)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This work presents a robust and mesh-independent implementation of an elasto-plastic constitutive model at large strains, appropriate for structured soils, into a Particle Finite Element code specially developed for ...
    • A numerical investigation of the incremental behavior of crushable granular soils 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (2016-09)
      Article
      Accés obert
      The mechanical behavior of granular materials is characterized by strong nonlinearity and irreversibility. These properties have been differently described by a variety of constitutive models. To test any constitutive ...
    • A practical method for suction estimation in unsaturated soil testing 

      Amaral, M.F.; Viana da Fonseca, A.; Romero Morales, Enrique Edgar; Arroyo Alvarez de Toledo, Marcos (CRC Press, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This research presents an alternative methodology to estimate suction in triaxial tests carried out under constant water content. A preliminary determination of the retention curve is proposed using two complementary ...
    • A pressuremeter-based evaluation of structure in London Clay using a kinematic hardening constitutive model 

      Rouainia, M.; Panayides, Stelios; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Springer, 2020-08)
      Article
      Accés obert
      The self-boring pressuremeter (SBP) test was designed to measure in situ engineering properties of the ground with a relatively small amount of disturbance. The properties that may be inferred from the test depend on the ...
    • A probabilistic Bayesian methodology for the strain-rate correction of dynamic CPTu data 

      Collico, Stefano; Arroyo Alvarez de Toledo, Marcos; Kopf, Achim; Devincenzi, M.J. (2022-11)
      Article
      Accés obert
      Dynamic Cone Penetration Tests (CPTu) profile offshore sediments by impact penetration. To exploit their results in full the measured data is converted to obtain a quasi-static equivalent profile. Dynamic CPTu conversion ...
    • A relation between undrained CPTu results and the state parameter for liquefiable soils 

      Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Canadian Science Publishing, 2023-11)
      Article
      Accés obert
      This paper presents a new interpretation procedure to estimate the initial state parameter from cone penetration testing (CPTu) in undrained conditions based on the results from a comprehensive set of numerical simulations ...
    • A soft-rock model for cement-improved clays 

      Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Castellanza, R.; Gens Solé, Antonio (IOS Press, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • A stable mesh-independent approach for numerical modelling of structured soils at large strains 

      Monforte Vila, Lluís; Ciantia, Matteo Oryem; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Elsevier, 2019-12)
      Article
      Accés obert
      We describe the large strain implementation of an elasto-plastic model for structured soils into G-PFEM, a code developed for geotechnical simulations using the Particle Finite Element Method. The constitutive model is ...
    • A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay 

      González, Nubia A.; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Rouainia, Mohamed (CIMNE, 2011)
      Text en actes de congrés
      Accés obert
      The paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ...
    • A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay 

      González, Nubia Aurora; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Rouainia, Mohamed (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
      Text en actes de congrés
      Accés obert
      The paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ...
    • A subloading surface clay and sand model 

      Pinedo Vilcahuamán, Paul José; Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2023)
      Text en actes de congrés
      Accés obert
      The mechanical response of natural soils is characterized by a narrow elastic domain, a smooth transition between elastic to elasto-plastic regime, and hysteretic behaviour during cyclic loading. These realistic features ...
    • A submersible drill rig for coring soils and rocks 

      Devincenzi, M.J.; Pérez Garcia, N.; Samoili, K.; Arroyo Alvarez de Toledo, Marcos (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The paper describes the design and initial field-testing of a remotely operated submersible drill rig able to obtain continuous cores of soil and/or rock up to 6 m long. The rig mast angle is hydraulically actuated covering ...
    • A time-to-facture DEM model for simulating creep in rough crushable sand 

      Lei, Jiangtao; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Zhang, Ningning (2023)
      Comunicació de congrés
      Accés obert
      A contact model able to capture creep of crushable sands within a discrete element method (DEM) framework is presented. Time dependency is established through stress-corrosion induced grain fracture. This is grafted onto ...
    • An Approach to enhance efficiency of DEM modelling of soils with crushable grains 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (Thomas Telford, 2015-02)
      Article
      Accés obert
      In this study oedometric compression tests of hydrocarbon coke, Fontainebleau sand and silica sand are simulated in three dimensions using breakable particles. The method adapts a rigorous breakage criterion for elasto-brittle ...
    • An unconditionally stable explicit finite element algorithm for coupled hydromechanical problems of soil mechanics in pseudo-static conditions 

      Monforte Vila, Lluís; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2022-11)
      Article
      Accés obert
      In this article, we present a novel explicit time-integration algorithm for the coupled hydromechanical soil mechanics problems in a pseudo-static regime. After introducing the finite element discretization, the semidiscrete ...