A determinação da resposta dinâmica das obras e o acompanhamento da evolução do seu comportamento durante as várias fases da vida é muito importante, estando inserido nas atividades do controle de segurança estrutural. A ...

This work investigates tensile crack propagation in concrete gravity dams by using some recently developed numerical techniques (crack-path field and strain injection techniques). The work carefully addresses aspects related ...

Dynamic fracture phenomena are studied employing low cost computational tools based on Finite Elements with Embedded strong discontinuities (E-FEM). Fracture nucleation and propagation are accounted for through the ...

Cracks propagating deep inside gravity dams can seriously affect their structural safety. Due to the potential catastrophic scenarios associated to the collapse of large concrete dams, it is a fundamental issue to ...

This paper presents a finite element approach for modelling three-dimensional crack propagation in quasi-brittle materials, based on the strain injection and the crack-path field techniques. These numerical techniques were ...

A barragem de Pretarouca, no rio Balsemão (serra de Montemuro, concelho de Lamego), tem 29,70 m de altura e 305 m de desenvolvimento. A albufeira tem 3,2 hm3, destinando-se a água a abastecimento público. A obra, construída ...

This paper presents the application of a fluid displacement based formulation for the modelling of dynamic dam-reservoir interactions. This approach requires the introduction of a constraint penalty term multiplier that ...

Os modelos de partículas, ao terem em conta a estrutura granular da rocha, consideram de forma explícita a variabilidade associada ao material, razão pela qual têm sido aplicados com sucesso no estudo da fratura em rocha. ...

Release of the in situ state of stress is often the most relevant action during the excavation of underground structures in rock masses, such as powerhouse caverns for hydroelectric schemes, which are often excavated at ...

Rigid block models are widely used in the analysis of masonry structures, as they provide a sound and efficient approximation of the observed behaviour, namely for modelling collapse modes that do not involve the internal ...