Neste relatório é apresentado o método de Euler para calcular as órbitas do sistema n-corpos, por exemplo, o dos planetas do sistema Solar, tendo em conta a propagação das forças gravíticas entre o Sol e os planetas e entre ...

Identification of potential failure mechanisms defined by the rock mass discontinuities or the concrete-rock interface plays an important role in the safety assessment of concrete dam foundations. The paper presents instances ...

Abstract. Portugal is presently facing a new hydroelectricity era, with the implementation of a large development program including not only the power upgrade of existing large hydro schemes, but also the construction ...

In concrete arch dam foundations, potential failure mechanisms are typically defined by natural rock discontinuities or the concrete-rock interface. Discrete element models are particularly adequate for the safety assessment ...

Ao longo dos últimos anos, têm sido desenvolvidos no LNEC técnicas para a realização de ensaios de vibração em barragens de betão inseridos em metodologias de determinação das propriedades dinâmicas destas obras. Inicialmente ...

In this work the finite element implementation of thermal analysis of concrete dams is described. The different temperature boundary conditions are properly represented. For the exposed face of the dam both convection/radiation ...

A methodology is proposed for dealing with the unbalanced stresses that arise from numerical models due to topography effects when horizontal stresses are applied at the vertical boundaries. The proposed methodology is ...

Recent regulations introduced a limit state approach to geotechnical design by using representative values of the actions and of the strength parameters, partial safety factors that affect them, and by including safety ...

Mechanical properties of soft rocks such as marls are strongly affected by suction, directly connected with wetting and drying cycles resulting from climate actions. An extensive experimental programme was carried out in ...