NMMR: Recent submissions

Now showing items 21-40 of 260

Seven years of continuous dynamic monitoring of baixo sabor dam

Pereira, S.; Magalhães, F.; Gomes, J. P.; Cunha, A.; Lemos, J. V. (Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2023-06)

The Baixo Sabor dam is a 123 meters high concrete arch dam located in the north of Portu-gal. After the performance of a forced vibration test, a quite unique experimental programme was initiated in the dam during the first ...
Probabilistic Model for the Representation of the ReservoirWater Level of Concrete Dams During Normal Operation Periods

Pereira, R.; Batista, A. L.; Neves, L. (Springer, 2018)

The dam’s reservoir water level varies over the year according to the water inflow and outflow, as a function of environmental events but also of dam exploitation management policy and human decisions. In the Portuguese ...
Metrological quality of the excitation force in forced vibration test of concrete dams

Lages Martins, L.; Gomes, J. P.; Ribeiro, A. (Purpose-Led Publishing, 2023-07)

This paper describes the study of the metrological quality of the excitation force in the context of force vibration test of concrete dams. For this purpose, a measurement uncertainty evaluation was performed, based on ...
Analysis, interpretation and prediction of the structural behavior of Cahora Bassa dam (Mozambique), affected by concrete swelling

Dias, I. M.; Batista, A. L.; Carvalho, E. (LNEC, 2022-05)

This paper presents the analysis, interpretation and prediction of the structural behavior of Cahora Bassa dam, which concrete is affected by a moderate ongoing swelling process, of the alkali-silica (ASR) type. To ...
Analysis and interpretation of the structural behavior of Covão do Meio dam, affected by concrete swelling, considering concrete visco-elasticity and cracking

Dias, I. M.; Batista, A. L. (SPRINGER, 2024-03)

This paper presents an updating of the analysis and interpretation of the structural behavior of Covão do Meio dam (in Portugal) which concrete is affected by an ongoing swelling process. The simulation of dam’s behavior ...
Interpretação e previsão do comportamento estrutural da barragem do Covão do Meio, afetada por expansões do betão

Ferra, S.; Dias, I. M.; Batista, A. L. (LNEC, 2022-11)

A barragem do Covão do Meio, localizada na vertente sul da serra da Estrela a uma altitude de 1650 m, é uma estrutura em abóbada com 28 m de altura máxima cujo betão está afetado por reações expansivas de moderada ...
Influence of temperature and stress field seasonal variations in the development of concrete swelling in dams. Application to the case of Covão do Meio dam (Portugal)

Dias, I. M.; Batista, A. L.; Ferra, S. (LNEC, 2022-05)

This paper presents the study of the influence of temperature and stress field seasonal variations in the development of concrete swelling in dams, considering the case study of Covão do Meio arch dam, in Portugal, which ...
Prediction of the structural behaviour of Bemposta dam (Portugal), affected by concrete swelling

Dias, I. M.; Batista, A. L.; Rebelo, R. (LNEC, 2022-05)

This paper presents the case study of the Bemposta dam, a hollow arch-gravity structure, whose concrete is affected by moderate expansive alkali-silica reactions. To interpret the dam behavior and the effects of the ...
Analysis of the monitored behaviour of a hydraulic tunnel using structural and statistical models

Pereira, R.; Espada, M.; Lamas, L.; Reis, N. (ISRM, 2022-10)

The Castelo do Bode hydraulic tunnel is part of the Lisbon water supply system. During its con-struction a monitoring system was implemented, aiming at monitoring the behaviour of the con-crete tunnel lining and of the ...
Stability analysis of a rock slope: Fully-probabilistic approach

Pereira, R.; Muralha, J.; Lamas, L. (Austrian Society for Geomechanics, 2023-10)

Stability analysis of rock slopes is an exercise that poses a variety of challenges to a rock engineer. Field information is often lacking and subjective modelling of the rock mass is required. Expert judgment also influences ...
Assessment of contact laws accounting for softening in 3D rigid concrete particle models

Azevedo, N.; Braga Farinha, M. L.; Oliveira, S. (MDPI, 2024-03-15)

o obtain predictions closer to concrete behaviour, it is necessary to employ a particle model (PM) that considers contact softening. A bilinear softening contact model (BL) has been adopted in PM studies. Several limitations ...
DEMRock6m – Discrete element modelling of rock engineering structures for seismic safety analyses - Relatório de avaliação final do projeto do P2I/LNEC 2013-2020

Muralha, J.; Lemos, J. V.; Lamas, L. (2024-01)

Neste relatório apresenta-se, de forma sucinta, a descrição da atividade de investigação realizada no âmbito do projeto DEMRock6m do P2I/LNEC 2013-2020. Os resultados da atividade desenvolvida são analisados e avaliados ...
Analysis and prediction of masonry wallette strength under combined compression-bending via stochastic computational modeling

Gonen, S.; Pulatsu, B.; Lourenço, P.; Lemos, J. V.; Tuncay, K.; Erduran, E. (Elsevier, 2023-02)

The out-of-plane flexural bending capacity of masonry is a fundamental property for understanding the behavior of masonry structures. This study investigates the behavior of unreinforced masonry wallettes subjected to ...
Site Specific Hazard Assessment and Multi-Level Seismic Performance Evaluation of Historical Mosque

Saygili, O.; Lemos, J. V.; Moghimi, S. (Taylor & Francis, 2023-05)

This study highlights the continued need for numerical simulation methods to predict the earthquake response and damage of masonry mosques, despite recent advances in research. The Kamanlı Masonry Mosque in İzmir, Turkey ...
Dynamic analysis of masonry arches using Maxwell damping

Lemos, J. V.; Sarhosis, V. (Elsevier, 2023-01)

Masonry arches are a fundamental component of historical structures. The assessment of the vulnerability of these heritage constructions to seismic loading requires reliable and efficient numerical models. Discrete element ...
Application of Bonded-Block Models to Rock Failure Analysis

Lemos, J. V. (MDPI, 2023-01)

Discrete element models are being increasingly applied to model rock failure processes. Bonded-particle models, based on circular or spherical particle systems, have been successfully used for two decades. More recently, ...
Chapter 5 Discrete Element Modeling

Lemos, J. V.; Bagi, K. (Springer, 2023-09)

This chapter consists of two parts. First a general overview is given: the exact definition of the Discrete Element Method is provided, and the main types of existing models are introduced; then the theoretical fundaments ...
Impact of Rejuvenator-Modified Mastic on Asphalt Mixture Stiffness: Meso-Scale Discrete Element Method Approach

Câmara, G.; Azevedo, N.; Micaelo, R. (MDPI, 2023-12)

Encapsulated rejuvenators embedded in asphalt mixtures are a promising technology to extend the service life of asphalt pavements. However, their effects on the asphalt mixture’s perfor- mance still need to be properly ...
RockGeoStat – Modelação de maciços rochosos marcadamente heterogéneos - Relatório de avaliação final do projeto do P2I/LNEC 2013-2020

Lamas, L.; Muralha, J.; Pereira, R. (2023-12)

Neste relatório apresenta-se, de forma sucinta, a descrição da atividade de investigação realizada no âmbito do projeto RockGeoStat do P2I/LNEC 2013-2020. Os resultados da atividade desenvolvida são analisados e avaliados ...
MEBAD – Modelação de Estruturas de Blocos sob Ações Dinâmicas - Relatório de avaliação final do projeto do P2I/LNEC 2013-2020

Lemos, J. V.; Batista, A. L.; Gomes, J. P. (2023-10)

Neste relatório apresenta-se, de forma sucinta, a descrição da atividade de investigação realizada no âmbito do projeto MEBAD do P2I/LNEC 2013-2020, no período 2016-2023. Os resultados da atividade são analisados e avaliados, ...

Now showing items 21-40 of 260

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