DBB/NMMR - Comunicações a congressos e artigos de revista: Recent submissions

  • Determination of in situ stresses using large flat jack tests 
    Figueiredo, B.; Lamas, L.; Muralha, J. (2010-10)
    Large flat jack tests are used to assess rock mass deformability in the design stages of large projects. The paper introduces a methodology for interpretation of the tests, with which it is also possible to obtain the in ...
  • Modelação de Maciços Rochosos em Grandes Obras Subterrâneas 
    Lemos, J. V. (FEUP, 2010-02)
    Abordam-se, neste trabalho, os aspectos gerais da modelação numérica do comportamento de maciços rochosos, com particular incidência na sua aplicação ao estudo de grandes obras subterrâneas. Apresentam-se sucintamente os ...
  • A 3D Rigid Particle Model for Shear Transfer Analysis in Reinforced Concrete 
    Azevedo, N.; Lemos, J. V.; de Almeida, J. (2009-11)
    A 3D spherical rigid particle discrete element formulation based on the Discrete Element Method, DEM, which has been used to model concrete, is described. The model has been shown to give a good agreement in terms of peak ...
  • Numerical modelling for interpretation of stress measurements by overcoring 
    Figueiredo, B.; Muralha, J.; Lamas, L. (2009-05)
    The overcoring method for measuring in situ stresses is frequently used in rock engineering projects. Most models for its interpretation assume that the rock is homogeneous, linear elastic and isotropic. The elastic constants ...
  • Joint Statistics 
    Grossmann, N. (Finish Tunnelling Association (FTA) & The Finish National Group of ISRM, 2009-11)
    The paper aims at presenting some achievements of joint statistics. The different statistical distributions used for the description of the main parameters of the joint sets (attitude, intensity, area, and aperture) are ...
  • About the Determination of the In-Situ State of Stress 
    Grossmann, N. (2009-05)
    The paper presents the 2 main methods for the determination of the in-situ state of stress in rock masses, developed by the LNEC, and refers to a practical case in which they were used, at an underground powerhouse in ...
  • Site characterization and rock testing for the evaluation of design parameters 
    Muralha, J.; Lamas, L.; Grossmann, N. (2009-10)
    This paper deals with issues related to the evaluation of design parameters from some types of in situ and laboratory tests performed, during the geotechnical investigations, to characterize the most relevant geotechnical ...
  • Influence of the intake tower dynamic behaviour on modal identification of Cabril dam 
    Mendes, P.; Oliveira, S. (2009-04)
    This paper presents a study, which describes the influence of the dynamic behaviour of the intake tower on the experimental results obtained from operational modal analysis of Cabril dam. A 3D finite element model, for the ...
  • State of stress assessment for the Picote II underground powerhouse design 
    Muralha, J.; Lamas, L.; Esteves, C. (2009-05)
    The paper presents a description of the Picote II site, the objectives of the study that was carried out to assess the in situ state of stress in the rock mass, details of the testing programme and the methodology used for ...
  • Modelação numérica para interpretação dos ensaios de determinação do estado de tensão no maciço rochoso da nova central da Bemposta 
    Muralha, J.; Figueiredo, B.; Lamas, L. (2009-07)
    A libertação do estado de tensão inicial nos maciços rochosos é a principal acção a considerar em escavações subterrâneas. Como o estado de tensão é muito influenciado pela topografia e por condições geológicas particulares ...
  • Assessment of the seismic capacity of stone masonry 
    Lemos, J. V.; Campos Costa, A.; Bretas, E. M. (2009)
    Abstract. The application of discrete element models based on rigid block formulations to the analysis of masonry walls under horizontal out-of-plane loading is discussed. The problems raised by the representation of an ...

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