Now showing items 1-20 of 29

  • 3D-mesomechanical analysis of external sulfate attack in concrete 

    Pérez Carreras, Adrià; Riera Bayo, Celia; López Garello, Carlos María; Carol, Ignacio (2017)
    Conference report
    Open Access
    The present study focuses on degradation of concrete by external sulfate attack. The numerical model developed by the MECMAT/UPC group, incorporates coupled C-M analysis using a meso-mechanical approach with discrete ...
  • 3D numerical model of a confined fracture tests in concrete 

    Montenegro, Oscar Ivan; Sfer, Domingo; López Garello, Carlos María; Carol, Ignacio (2013)
    Conference report
    Open Access
    The paper deals with the numerical simulation of a confined fracture test in concrete. The test is part of the experimental work carried out at ETSECCPB-UPC in order to elucidate the existence of a second mode of fracture ...
  • Análisis del hormigón en modo mixto de fractura utilizando un modelo meso-estructural con elementos junta. 

    López Garello, Carlos María; Carol, Ignacio; Carol, Ignacio (2010)
    Conference report
    Restricted access - publisher's policy
    En este trabajo se presentan resultados de la simulación numérica de algunos ensayos experimentales sobre muestras de hormigón sometidas a carga biaxial que combina tracción y corte [1]. Para ello se emplea una modelización ...
  • Análisis mecomecánico de la fisuración del hormigón sometido a la acción de altas temperaturas 

    Rodríguez, Mariana; Pérez, Adrià; López Garello, Carlos María; Carol, Ignacio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Conference report
    Restricted access - publisher's policy
    Un modelo meso estructural 2D empleado inicialmente en el análisis mecánico del hormigón bajo altas temperaturas, es extendido en este trabajo a un análisis 3D y a un análisis termo-mecánico acoplado más complejo. El ...
  • Análisis mesoestructural de la fisuración en procesos expansivos del hormigón 

    Campos, A.; López Garello, Carlos María; Aguado de Cea, Antonio (2011)
    Article
    Restricted access - publisher's policy
    Los procesos reactivos, tales como la reacción álcali-árido, las reacciones de oxidación de sulfuros, el ataque sulfático extemo e interno, etc., provocan en general cambios de volumen diferencial en la estructura interna ...
  • Análisis mesomecánico del hormigón bajo cargas que generan cambios de dirección de fisuración 

    Puiggrós Parayre, Luis Javier; López Garello, Carlos María; Rodríguez, Mariana; Carol, Ignacio (2015)
    Conference report
    Restricted access - publisher's policy
    Para contrastar y comparar el comportamiento de modelos constitutivos del hormigón que tienen en cuenta la anisotropía inducida por fisuración y daño, con frecuencia se ha empleado un test teórico en el cual se impone un ...
  • Análisis meso-mecánico del hormigón bajo la acción de procesos expansivos internos. 

    Campos, A.; López Garello, Carlos María; Aguado de Cea, Antonio (2010)
    Conference report
    Restricted access - publisher's policy
    Es conocido que la existencia de procesos expansivos en el hormigón inducidos por reacciones químicas, puede provocar una considerable degradación de sus propiedades mecánicas. Este comportamiento puede ser la respuesta a ...
  • Análisis numérico de la influencia de la fisuración en el comportamiento de una presa de hormigón 

    Campos, A.; López Garello, Carlos María; Aguado de Cea, Antonio (2012)
    Conference report
    Restricted access - publisher's policy
    This paper introduces a 2D simulation of a cross section of the block 13-14 of Mequinenza Dam, which presents pronounced and uncommon remaining displacements. Joint elements have been included in to the model with a nonlinear ...
  • ASR expansions in concrete under triaxial confinement 

    Liaudat, Joaquín; Carol, Ignacio; López Garello, Carlos María; Saouma, Victor E. (2018-02)
    Article
    Restricted access - publisher's policy
    It is well known that the Alkali-Silica Reaction (ASR) expansion in concrete is influenced by the stress state of the material. However, the extent and nature of this influence is not completely understood due to the ...
  • Computational modeling of external sulfate attack in concrete at the meso-level 

    Idiart Castellano, Andrés Enrique; Carol, Ignacio; López Garello, Carlos María; Murcia Vela, Juan (2009)
    Conference report
    Restricted access - author's decision
    This paper presents recent work by the authors along the domain of coupled chemo-mechanical problems in concrete. External sulfate attack is analyzed from a mesoscale point of view, in which the main heterogeneities of ...
  • Coupled C-M meso-scale model for ASR expansion in concrete 

    Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (CRC Press/Balkema, 2018)
    Conference report
    Restricted access - publisher's policy
    As part of an ongoing development, this paper presents a brief description of a new Chemo-Mechanical (C-M) model for the expansions due to Alkali-Silica Reaction (ASR) in concrete. This model has been formulated at the ...
  • Diffusion-reaction model for the internal sulfate attack in concrete 

    Campos, A.; López Garello, Carlos María; Aguado de Cea, Antonio (2016-01)
    Article
    Open Access
    In the analysis of the behavior of concrete structures affected by expansive problems, it is often necessary to use kinetics models of the reactions involved to assess and predict the magnitude, distribution, and evolution ...
  • Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine 

    Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2017)
    Conference report
    Open Access
    The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper. The formulation consists of two main diffusion/reaction ...
  • Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam 

    Campos, A.; López Garello, Carlos María; Blanco Álvarez, Ana; Aguado de Cea, Antonio (2018-03)
    Article
    Restricted access - publisher's policy
    The alkali-aggregate reaction and the internal sulfate attack are two chemical reactions that lead to expansions in concrete structures. The former is one of the main causes of expansions in concrete dams and has been ...
  • Free expansion tests for ASR at the level of a single aggregate-matrix interface: experimental results and numerical modelling 

    Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (Springer, 2015)
    Conference report
    Restricted access - publisher's policy
    As part of an on-going research project, a model being developed to simulate ASR in concrete is described. The formulation consists of the three main diffusion/reaction field equations for the concentrations of Alkali, ...
  • Mesomechanical analysis of concrete under loading that generates rotation of cracking 

    Puiggrós, L.; López Garello, Carlos María; Rodríguez, Mariana; Carol, Ignacio (CIMNE, 2015)
    Conference lecture
    Open Access
    Willam´s test has been often used to compare constitutive models which take into account induced anisotropy due to damage and cracking. This numerical test emulates the continuous rotation of the principal stress and ...
  • Meso-mechanical analysis of the fracture of concrete specimens in mixed mode 

    Rodríguez, Mariana; López Garello, Carlos María; Carol, Ignacio; Caner, Ferhun Cem (2009)
    Conference report
    Restricted access - author's decision
    This paper describes recent numerical simulation results of some experiments carried out by Nooru-Mohamed to study mixed mode fracture of concrete. The numerical simulation is based on a meso-mechanical model developed ...
  • Modeling concrete expansions via couped C-M mesoscale analysis with zero-thickness interface elements, and lab experiments 

    Carol, Ignacio; Liaudat, Joaquín; López Garello, Carlos María (ISTE-Wiley, 2017)
    Conference report
    Restricted access - publisher's policy
    This paper briefly summarizes ongoing developments on C-M coupled modelling of concrete swelling due to external sulfate attack and due to alkali-silica reaction. Both models are based on a meso-mechanical model for concrete, ...
  • Modeling of drying shrinkage of concrete specimens at the meso-level 

    Idiart Castellano, Andrés Enrique; López Garello, Carlos María; Carol, Ignacio (2010)
    Article
    Restricted access - publisher's policy
    In this paper, an existing mesomechanical model for cementitious materials is extended to the domain of diffusion-driven phenomena. The model is based on the Finite Element Method, and uses zerothickness interface elements ...
  • Modeling of heat and mass transfer induced by high temperature in concrete 

    Rodríguez, Mariana; López Garello, Carlos María; Carol, Ignacio (CIMNE, 2015)
    Conference report
    Open Access
    In the context of a long term development of a general meso-mechanical model for concrete under mechanical and environmental actions, this paper describes the on-going work to represent theheat and moisture transfer in ...