Ara es mostren els items 44-63 de 75

    • Massive, continuous and non-invasive surface measurement of degree of saturation by shortwave infrared images 

      Parera Morales, Ferran; Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo (2021-06)
      Article
      Accés obert
      Short wave infrared (SWIR) images provide an accurate procedure to measure the degree of saturation (Sr) of soils. Changes in Sr result in reflectance changes which were recorded by a special digital camera optimized for ...
    • Mathematical modelling of slopes 

      Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè; Yerro Colom, Alba (Elsevier, 2014)
      Article
      Accés obert
      The paper discusses first the effect of rainfall on the stability of slopes and it focusses on the role of permeability. Existing or induced discontinuities are shown to have a remarkable effect on the slope safety. Also, ...
    • Mecanismos que controlan la velocidad de los deslizamientos 

      Pinyol Puigmartí, Núria Mercè; Scoppettuolo, M.E.; Alonso Pérez de Agreda, Eduardo (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
      Comunicació de congrés
      Accés obert
      Los deslizamientos activos a menudo mantienen velocidades lentas o moderadas (del orden de mm/día o cm/día) durante un largo periodo de tiempo. Las variaciones de la velocidad están relacionadas con los cambios en las ...
    • Modelling compacted soils 

      Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Mechanical and hydraulic compacted soil properties for a given soil mineralogy are essentially controlled by the attained dry density, water content and microstructure. Basic compaction conditions (wet or dry of optimum, ...
    • Modelling creeping and catastrophic failure of thermo-mechanically driven landslides 

      Zervos, Antonis; Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (Springer, 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Frictional heating of the slip zone is a possible explanation for why some catastrophic landslides moved so fast and so far. The transition from a creeping phase to catastrophic collapse governed by frictional heating is ...
    • Modelling large deformation problems in unsaturated soils 

      Yerro Colom, Alba; Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (E3S Web of Conferences, 2016)
      Text en actes de congrés
      Accés obert
      Applications of unsaturated soil mechanics often involve large deformations and displacements. This is the case of collapse behaviour of low density soils or the unrestrained swelling of expansive clays. Rain induced ...
    • Modelling progressive failure with MPM 

      Yerro Colom, Alba; Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (CRC Press Taylor & Francis Group, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this work, the progressive failure phenomenon is studied using the Material Point Method (MPM). MPM is categorized as a method in between the classical Finite Element Method (FEM) and the truly particle methods. It is ...
    • Modelling the initiation and run-out of rainfall-induced slope instability 

      Yerro Colom, Alba; Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Rain induced instabilities are a common geotechnical problem specially in partially saturated soils. A large number of steep, natural or cut slopes remain stable for a long time and then fail during heavy rainstorms or ...
    • Modelling the response of Lechago earth and rockfill dam 

      Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Soriano, Antonio; Pinyol Puigmartí, Núria Mercè; Esteban, F. (2011-03)
      Article
      Accés restringit per política de l'editorial
    • Novel analysis for large strains based on particle image velocimetry 

      Pinyol Puigmartí, Núria Mercè; Alvarado Bueno, Mauricio (2017-07)
      Article
      Accés obert
      Over the last few decades, the particle image velocimetry (PIV) technique has become an interesting tool used to measure displacements in the field of experimental mechanics. This paper presents a procedure to interpret ...
    • Novel procedure to validate MPM results by means of PIV measurements 

      Pinyol Puigmartí, Núria Mercè; Alvarado Bueno, Mauricio; Parera Morales, Ferran; Yerro Colom, Alba (2017-02)
      Article
      Accés obert
      The Particle Image Velocimetry is a powerful non-invasive technique to analyse displacements in experimental tests. Displacement increments elapsed between the capture of two digital images are commonly measured on points ...
    • Nuevo método para la interpretación de imágenes digitales de inestabilidad mediante la técnica PIV. 

      Alvarado Bueno, Mauricio; Ruiz, Álvaro; Pinyol Puigmartí, Núria Mercè (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
      Text en actes de congrés
      Accés obert
      Este artículo presenta una metodología que proporciona los desplazamientos acumulados, velocidad, aceleración y deformación de puntos asociados a partículas reales a partir de las medidas obtenidas mediante la técnica ...
    • Numerical analysis of rapid drawdown: applications in real cases 

      Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2016-07)
      Article
      Accés obert
      In this study, rapid drawdown scenarios were analyzed by means of numerical examples as well as modeling of real cases with in situ measurements. The aim of the study was to evaluate different approaches available for ...
    • Numerical modelling of Val d’Arán landslide with Material Point Method 

      Carluccio, Gaia di; Pinyol Puigmartí, Núria Mercè; Perdices Cos, Pau; Hurlimann Ziegler, Marcel (CIMNE, 2019)
      Text en actes de congrés
      Accés obert
      Flow-like landslides in mountainous areas can cause extensive damages due to their high velocity and long run-out distance. This work presents a real case of landslide occurred on 11 May 2018 in Val d’Arán (Catalonia, ...
    • Parámetros de diseño, métodos de cálculo y solicitaciones 

      Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2007)
      Text en actes de congrés
      Accés obert
      Se presenta una serie de roturas en las que fue posible comparar los ángulos de fricción derivados mediante análisis retrospectivo con los obtenidos en ensayos de laboratorio utilizando técnicas diferentes. Cuando el ...
    • Rapid drawdown and landslides 

      Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (CRC Press, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Predicting the pore pressure distribution in a slope after rapid drawdown conditions requires the solution of a coupled flow‐deformation analysis in a saturated‐unsaturated porous media. A fully coupled finite element code ...
    • Rapid drawdown in embankment dams 

      Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (CRC Press, 2012)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The calculation of pore water pressure distribution in a slope partially submerged and subjected to a drawdown is analyzed in this chapter. Drawdown phenomenon is a critical situation for the stability of slopes of earth ...
    • Recent developments of the Material Point Method for the simulation of landslides 

      Alonso Pérez de Agreda, Eduardo; Yerro Colom, Alba; Pinyol Puigmartí, Núria Mercè (2015-09)
      Article
      Accés obert
      The paper describes first the theoretical framework of a "single layer" three phase material. The formulation is general and particular cases are dry and fully saturated soils. The formulation and discretization of the ...
    • Rotura de cajones bajo la acción del oleaje 

      Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
    • Run-out of landslides in brittle soils 

      Yerro Colom, Alba; Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2016-03)
      Article
      Accés obert
      One of the factors causing the acceleration of landslides is the loss of strength of the soil involved in the potential unstable mechanism. The travelled distance and the landslide velocity, a key factor in risk analysis, ...