Departamento de Barragens de Betão: Recent submissions

Now showing items 1-20 of 636

Reforço de barragens de betão com recurso a aumentos da secção transversal

Conde Silva, J.; Serra, C. (Universidade de Aveiro, 2025-10)

A adição de elevados volumes de betão por forma aumentar a secção transversal de barragens de betão é um procedimento de reforço relativamente comum. Estas modificações de secções de barragens incluem a adição de betão ao ...
Reabilitação de barragens de betão através de sobreposição de camadas

Conde Silva, J.; Serra, C. (Universidade de Aveiro, 2025-10)

A reabilitação de barragens de betão com recurso a argamassas e betões é uma prática amplamente adotada, impulsionada tanto por vantagens técnicas como económicas. Este artigo tem o objetivo de consolidar as informações ...
Developing Statistical and Multilayer Perceptron Neural Network Models for a Concrete Dam Dynamic Behaviour Interpretation

Sejas, A.; Pereira, S.; Mata, J.; Cunha, A. (Infrastructures, 2025-11-09)

This work focuses on the dynamic monitoring behaviour of concrete dams, with a specific emphasis on the Baixo Sabor dam as a case study. The main objective of the dynamic monitoring is to continuously observe the dam’s ...
Influence of rock mass hydraulic properties and jointing pattern on hydromechanical behaviour of gravity dams

Braga Farinha, M. L.; Azevedo, N.; Oliveira, S. (The International Journal on Hydropower and Dams, 2025-10)

In concrete dam foundations, rock mass discontinuities and spatial variations in permeability give rise to complex seepage patterns, making monitoring and safety evaluation particularly challenging. An accurate safety ...
A coupled hydromechanical model including fracture propagation along th dam foundation interface for gravity dam´s stability assessment

Braga Farinha, M. L.; Azevedo, N.; Oliveira, S. (ABMS e SPG (Associação Brasileira de Mecânica dos Solos e Sociedade Portuguesa de Geotecnia), 2025-09)

Most gravity dam failures occur due to sliding along the dam/foundation interface, rock mass discontinuities, or rock mass layers of lower strength. The possibility of sliding of a dam is usually evaluated based on ...
Drone survey of an embankment dam to detect surface changes

Henriques, M. J.; Silva, H. (LNEC, 2025-04)

A point cloud is a set of three-dimensional coordinates, to which color (that of the object's surface) can be added. It's a simple way to reproduce this object (which could be a dam, a building, a breakwater, a street, a ...
A 3D point cloud model of Santa Luzia dam and its contribution for improving the finite element mesh

Henriques, M. J.; Dias, I. M.; Roque, D.; Gomes, A. (LNEC, 2025-04)

The analysis and interpretation of the structural behavior of concrete dams is usually performed by using finite element models of the dam and its rock mass foundation. The finite element mesh of the dam must accurately ...
Prediction of dam concrete structural properties based on wet-screened test results and mesoscale modelling

Serra, C. (2017-12)

Dam or full-mixed concrete is produced with large aggregates which implies the use of large specimens, heavy laboratory equipment and non-standard embedding monitoring devices. The wet-screened concrete, obtained from the ...
LNEC support to the design adaptation of Alto Tâmega dam due to the rockslide on the right bank slope

Muralha, J.; Batista, A. L.; Lamas, L.; Mata, J.; Serra, C. (International Water Power and Dam Construction, 2025)

During the excavations for the Alto Tâmega dam, a rockslide occurred on the right bank slope immediately downstream from the dam insertion surface, involving a volume of about 23,000 m3, which led to the complete stop of ...
Creep tests in Daivões dam

Conde Silva, J.; Serra, C. (LNEC, 2025-04-14)

This paper summarises the most relevant aspects of the design and installation of the laboratory and in-situ setups used to determine the dam concrete deformability over time. These experimental setups aim at determining ...
Safety control during the Alto Tâmega Construction

Mata, J.; Serra, C.; Muralha, J.; Batista, A. L.; Lamas, L. (Taylor & Francis Group, 2025-05)

During the excavations stage of Alto Tâmega dam construction, a landslide occurred on the right bank slope, immediately downstream of the dam’s insertion surface, involving a rock mass volume of about 23,000 m3. This paper ...
Adaptative warning thresholds in dam safety using kernel density estimation

Silva-Cancino, N.; Irazábal, J.; Salazar, F.; Mata, J. (LNEC, 2025-04)

This study presents a novel adaptive warning threshold approach for dam safety monitoring, employing Kernel Density Estimation (KDE), a statistical method for estimating the probability density function of continuous random ...
Dynamic behaviour of a concrete dam: Development of statistical and machine learning models for interpretation of monitoring data

Sejas, A.; Pereira, S.; Mata, J.; Cunha, A. (LNEC, 2025-04)

This work focuses on the dynamic monitoring behaviour of concrete dams, with a specific emphasis on the Baixo Sabor dam as a case study. The main objective of the dynamic monitoring is to continuously observe the dam's ...
Analysis and interpretation of the structural behaviour of Daivões dam during the first filling of the reservoir

Serra, C.; Mata, J. (LNEC, 2025-04-14)

This paper describes the main characteristics of Daivões dam and the construction period, presents the most relevant monitoring data and the structural behaviour interpretation of Daivões dam during the reservoir’s first ...
LNEC support to the design adaptation of Alto Tâmega dam due to the rockslide on the right bank slope

Muralha, J.; Batista, A. L.; Lamas, L.; Mata, J.; Serra, C. (LNEC, 2025-04)

During the excavations for the Alto Tâmega dam, a rockslide occurred on the right bank slope immediately downstream from the dam insertion surface, involving a volume of about 23,000 m3, which led to the complete stop of ...
Contributions for a structural concrete dam monitoring dashboard in case of extreme flood events

Mata, J.; Serra, C.; Cunha, J.; Faria, A.; Salazar, F. (ICOLD, 2025-05)

The observed behaviour of dams in flood events is a fundamental activity in supporting decision-making regarding emergency management situations. Computer systems for monitoring the observed values are mostly designed to ...
Long-term behaviour analysis of Santa Luzia dam affected by concrete swelling reactions using machine learning techniques

Cunha, J.; Gomes, A.; Mata, J.; Batista, A. L.; Dias, I. M.; Salazar, F. (ICOLD, 2025-05)

This paper aims to analyze the structural effects of concrete swelling reactions in a large dam using Machine Learning (ML) techniques. The analysis is based on geodetic displacements data collected from the beginning of ...
Identificação e registo do estado de conservação de azulejos através de imagens multiespetrais

Roque, D.; Coutinho, M. L.; Henriques, M. J.; Santos Silva, A.; Morais Pereira, S. (Universidade Politécnica de Valência, 2024-10)

Desde pelo menos o século 15 que Portugal mantém a tradição de uso de revestimentos azulejares na sua arquitetura. Devido à especificidade estilística, quantidade e continuidade da sua aplicação no edificado, o azulejo é ...
Inspeção visual assistida de paramentos de barragens de betão

Ramos, S. (2015)

Este trabalho apresenta um estudo de aplicação de técnicas de Processamento Digital de Imagem (PDI) à inspeção visual de obras de engenharia, neste caso particular, o paramento da barragem do Covão do Meio na Serra da ...
Determinação semiautomática de limiares para classificação de conjuntos multitemporais de imagens de satélite

Barbosa, A. (2016)

O desenvolvimento de métodos de classificação aplicados a imagens de satélite tem apresentado resultados bastante satisfatórios, nomeadamente a classificação baseada em objeto (OBIA – Object Based Image Analysis). Porém, ...

Now showing items 1-20 of 636

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