Now showing items 1-12 of 191

    • Posibilidades de los ordenadores personales en el cálculo de estructuras por el método de los elementos finitos 

      Oñate Ibáñez de Navarra, Eugenio; Gaona, Ángel; Oliver Olivella, Xavier; Suárez Arroyo, Benjamín (1983-04)
      Article
      Open Access
    • An accurate nonlocal bonded discrete element method for nonlinear analysis of solids: application to concrete fracture tests 

      Celigueta Jordana, Miguel Ángel; Latorre Sánchez, Juan Salvador; Arrufat Garcia, Ferran; Oñate Ibáñez de Navarra, Eugenio (Springer, 2020-05)
      Article
      Open Access
      We present a numerical procedure for elastic and nonlinear analysis (including fracture situations) of solid materials and structures using the discrete element method. It can be applied to strongly cohesive frictional ...
    • A plastic-damage model for concrete 

      Lubliner, Jacob; Oliver Olivella, Xavier; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio (1989)
      Article
      Restricted access - publisher's policy
      In this paper a constitutive model based on an internal variable-formulation of plasticity theory for the non-linear analysis of concrete is presented. The model uses a new yield criterion which matches experimental data ...
    • A consistent characteristic length for smeared cracking models 

      Oliver Olivella, Xavier (John Wiley & sons, 1989-02)
      Article
      Restricted access - publisher's policy
      A numerical scheme for crack modelling by means of continuous displacement fields is presented. In two-dimensional problems a crack is modelled as a limiting case of two singular lines (with continuous displacements, but ...
    • A computational model for progressive cracking in large dams due to the swelling of concrete 

      Cervera Ruiz, Miguel; Oliver Segura, José; Herrero, E.; Oñate Ibáñez de Navarra, Eugenio (1990-09)
      Article
      Open Access
      The paper presents a computational model for the analysis of large concrete gravity dams subjected to severe damage due to internal actions. It has been observed in several operating concrete dams that the combined effects ...
    • An analysis of strong discontinuities induced by strain-softening in rate-independent inelastic solids 

      Simó, Juan Carlos; Oliver Olivella, Xavier; Armero, Francisco (Springer, 1993-09)
      Article
      Restricted access - publisher's policy
      Ket qualitative features of solutions exhibiting strong discontinuities in rate-independent inelastic solids are identified and exploited in the design of a new class of finite element approximations. The analysis shows ...
    • Seismic evaluation of concrete dams via continuum damage models 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Carvalho Marques de Faria, Rui Manuel (Wiley, 1995-09)
      Article
      Open Access
      In this paper a general methodology for the analysis of large concrete dams subjected to seismic excitation is outlined. It is valid both for gravity dams (2D representation) and arch dams (3D representation). The method ...
    • A rate-dependent isotropic damage model for the seismic analysis of concrete dams 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Manzoli, Osvaldo (Wiley, 1996-09)
      Article
      Open Access
      In this paper a rate-dependent isotropic damage model developed for the numerical analysis of concrete dams subjected to seismic excitation is presented. The model is shown to incorporate two features essential for seismic ...
    • A plasticity model for simulation of industrial powder compaction processes 

      Oliver Olivella, Xavier; Oller Martínez, Sergio Horacio; Cante Terán, Juan Carlos (1996-08)
      Article
      Restricted access - publisher's policy
      A constitutive model, based on large strain plasticity, for simulation of industrial powder compaction processes is presented. The elastic response is stated in terms of a hyperelastic model based on a hookean elastic free ...
    • A strain-based plastic viscous-damage model for massive concrete structures 

      Faria, R; Oliver Olivella, Xavier; Cervera Ruiz, Miguel (1998-05)
      Article
      Open Access
      Within the framework of continuum damage mechanics, a new constitutive damage model for massive concrete is presented, mainly intended for the seismic analysis of gravity and arch dams. Consistent with thermodynamic ...
    • Thermo-chemo-mechanical model for concrete. II: damage and creep 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, T (American Society of Civil Engineers, 1999-09)
      Article
      Open Access
      In this work a coupled thermo-chemo-mechanical model for the behavior of concrete at early ages is proposed. This paper presents the formulation and assessment of the mechanical aspects of the model. Short- and long-term ...
    • Simulation of construction of RCC dams. II: stress and damage 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, Tomás (2000-09)
      Article
      Open Access
      The increasing number of roller compacted concrete (RCC) dams being built around the world demands accurate methodologies for the realistic short- and long-term evaluations of the risk of thermally induced cracking in these ...