Now showing items 1-15 of 15

  • 3D DEM simulations of CPT in sand 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2012)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Cone penetration test in a virtual calibration chamber 

    Butlanska, Joanna (Universitat Politècnica de Catalunya, 2014-07-21)
    Doctoral thesis
    Open Access
    Cone penetration test (CPT) is a fast and reliable site investigation tool for exploring soils and soft ground. While the interpretation of the test results in clay has advanced considerably from a theoretical and numerical ...
  • Cone penetration tests in a virtual calibration chamber 

    Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio; Calvetti, Francesco; Jamiolkowski, Michael (2011)
    Article
    Restricted access - publisher's policy
    A virtual calibration chamber was built using a threedimensional model based on the discrete-element method. The chamber was then filled with a scaled granular equivalent of Ticino sand, the material properties of which ...
  • DEM modelling of a double-porosity crushable granular material 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (CRC Press, 2014)
    Conference report
    Restricted access - publisher's policy
    The effect of grain crushing during one dimensional compression and triaxial compression tests is investigated in a double-porosity granular material using the Discrete Element Method (DEM). Experimental tests results from ...
  • DEM modelling of cone penetration tests in a double-porosity crushable granular material 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (2016-03)
    Article
    Open Access
    A three-dimensional discrete element model is used to investigate the effect of grain crushing on the tip resistance measured by cone penetration tests (CPT) in calibration chambers. To do that a discrete analogue of pumice ...
  • Homogeneity and symmetry in DEM models of cone penetration 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (American Institute of Physics (AIP), 2009)
    Conference report
    Restricted access - publisher's policy
    A 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 ...
  • Mapping deformation during CPT in a virtual calibration chamber 

    Butlanska, Joanna; O'Sullivan, C.; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press/Balkema, 2010)
    Conference report
    Restricted access - publisher's policy
    This 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 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Amoroso, Sara; Gens Solé, Antonio (2018-09)
    Article
    Restricted access - publisher's policy
    Calibration 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 ...
  • Multi-scale analysis of cone penetration test (CPT) in a virtual calibration chamber 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; O'Sullivan, Catherine (2014-01)
    Article
    Restricted access - publisher's policy
    A virtual calibration chamber was developed using a three-dimensional (3D) discrete element method (DEM) to perform cone penetration tests (CPTs) on a discrete analogue of Ticino sand. The macroscale response of the DEM ...
  • SBPM testing in Bothkennar clay: structure effects 

    Arroyo Alvarez de Toledo, Marcos; González, Nubia Aurora; Butlanska, Joanna; Gens Solé, Antonio; Dalton, C (Taylor & Francis, 2008)
    Conference report
    Restricted access - publisher's policy
    A series of self-boring pressuremeter tests performed in Bothkennar clay are simulated using a finite element model of undrained cavity expansion. A bonded elasto plastic soil model is employed to represent Bothkennar clay ...
  • Simulation of the cone penetration test: discrete and continuum approaches 

    Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Monforte Vila, Lluís; Carbonell, J.M.; Ciantia, Matteo; O'Sullivan, Catherine (Australian Geomechanics Society, 2016)
    Conference report
    Restricted access - publisher's policy
    The paper presents the modelling of the cone penetration test using two procedures: a discrete approach and a continuum approach. The discrete approach is based on the Discrete Element Method where a granular material is ...
  • Size effects on a virtual calibration chamber 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press. Taylor & Francies Group, 2010)
    Conference report
    Restricted access - publisher's policy
    Virtual Calibration Chambers (VCC) are 3D-DEM models where cone penetration is simulated. They offer the possibility of substituting for the rather more expensive physical calibration chambers. One important issue in ...
  • Standard penetration testing in a virtual calibration chamber 

    Zhang, Ningning; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Gens Solé, Antonio; Butlanska, Joanna (Elsevier, 2019-07)
    Article
    Restricted access - publisher's policy
    The virtual calibration chamber technique, based on the discrete element method, is here applied to study the standard penetration test (SPT). A macro-element approach is used to represent a rod driven with an impact like ...
  • Steady state of solid-grain interfaces during simulated CPT 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2013)
    Article
    Restricted access - publisher's policy
    It has recently been shown (Arroyo et al. [1]) that 3D DEM models are able to reproduce with reasonable accuracy the macroscopic response of CPT performed in calibration chambers filled with sand. However, the cost of ...
  • Virtual Calibration Chamber CPT on Ticino sand 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2010)
    Conference report
    Restricted access - publisher's policy
    The following paper surnmarizes results of CPT's performed in virtual calibration chamber (VCC) built with a 3D model based on the distinct element method (DEM). A discrete material tailored to mimic Ticino sand is tested ...