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DT/NIT - Comunicações a congressos e artigos de revista: Recent submissions

Now showing items 61-80 of 173

Comportamento do lastro ferroviário de agregado de escória de aciaria sob carregamento triaxial monotónico

Delgado, B.; Fonseca, A.; Fortunato, E.; Coelho, D. (SPG, 2018-05-27)

Este artigo discute o comportamento mecânico do lastro ferroviário de escória de aciaria de forno de arco elétrico, com base em resultados de ensaios triaxiais monotônicos, os quais foram obtidos no âmbito de uma investigação ...
Large-scale triaxial apparatus for railroad ballast material

Fortunato, E. (Institut Francais des Sciences et Technologies des Transports, de l'Amenagement et des Reseaux (IFSTTAR), 2017-11-23)

The ballast layer is a railway superstructure component with functions related to the track mechanical behavior, the assessment of which is of singular importance for track behavior evaluation through stress-strain analysis. ...
Segurança na escavação de valas. Recomendações e boas práticas

Fortunato, E. (Ordem dos Engenheiros, 2017-11-23)

No âmbito da implementação de projetos de engenharia civil, é frequente proceder-se à escavação de valas, quer para permitir construir fundações de edifícios, quer para executar redes de infraestruturas, tais como condutas ...
Machine learning for pavement frictionpPrediction using Scikit-Learn

Marcelino, P.; Antunes, M. L.; Fortunato, E. (Springer, 2017-09-05)

During the last decades, the advent of Artificial Intelligence (AI) has been taking place in several technical and scientific areas. Despite its success, AI applications to solve real-life problems in pavement engineering ...
Current international practices on pavement condition assessment

Marcelino, P.; Antunes, M. L.; Fortunato, E. (CRC Press, 2017-06-12)

Due to aging, exposure and maintenance backlog, infrastructures are deteriorating and their capacity to provide adequate service is decreasing. Accordingly, pavement management systems have been gaining ground as a systematic ...
Exploratory Data Analysis in Pavement Engineering Using Python

Marcelino, P.; Antunes, M. L.; Fortunato, E. (FEUP, 2017-04-20)

This paper presents an exploratory data analysis in pavement engineering problems using Python. A case study with data from the U.S. Long-Term Pavement Performance (LTPP) database illustrates Python applications for data ...
A participação do LNEC no projeto de estabelecimento de um “Centro de Pesquisa Rodoviária” em Moçambique

Antunes, M. L.; Macedo, A. L.; Fortunato, E. (CRP, 2016-04-12)

Na presente comunicação efetua-se uma caracterização geral do projeto em curso referente à criação de um Centro de Pesquisa Rodoviária (CPR) em Moçambique, que visa estabelecer as bases para melhorar a capacidade de ...
Comportamento estrutural de um trecho rodoviário construído com agregado siderúrgico inerte para construção (ASIC)

Fortunato, E.; Roque, A. J.; Gomes Correia, A. (SPG, 2018-05-27)

A utilização de materiais alternativos, nomeadamente subprodutos industriais e materiais reciclados, na construção de infraestruturas de transporte e de obras geotécnicas, tem vindo a ser promovida por todo o mundo. Para ...
Integrated maintenance model for heavy haul tracks – general basis and case studies

Fortunato, E. (Civil-Comp Press, 2018-09-03)

Due to the necessity to transport each time more a bigger material amount, especially commodities, in the last years, the railways have developed cost effective strategies to increase capacity based on the axle loading ...
Railway ballast behaviour of steel furnace slag aggregate under monotonic triaxial load

Delgado, B.; Fonseca, A.; Fortunato, E.; Coelho, D. (Civil-Comp Press, 2018-09-03)

Nowadays, there is a strong pressure to use industrial byproducts and recycled materials in civil engineering works. In Portugal, for example, several studies have been carried out with the aim of demonstrating that some ...
Evaluation of ballast fouling using GPR

Fontul, S.; Fortunato, E.; Chiara, F. (IEEE, 2014-06-30)

In order to evaluate the level of ballast fouling for Portugal aggregates and the influence of antenna frequency on its measurement several laboratory tests were performed on different materials. Initially the clean granitic ...
Análise comparada de um agregado de escória de aciaria como material alternativo para lastro de vias férreas por meio de ensaios triaxiais monotônicos e cíclicos

Delgado, B.; Fonseca, A.; Fortunato, E.; Coelho, D. (ABMS, 2018-08-28)

São apresentados resultados de ensaios triaxiais monotônicos e cíclicos conduzidos em corpos de prova de 150 mm de diâmetro por 300 mm de altura, em escala reduzida numa proporção de 1:2,5 em relação à granulometria de ...
Mechanical behavior of inert steel slag ballast for heavy haul rail track: laboratory evaluation

Delgado, B.; Fonseca, A.; Fortunato, E. (Elsevier, 2019-05-14)

The ballast mechanical behavior is one of most important aspects governing the performance and safety conditions of railway track lines. Usually comprised of natural crushed rock, the research for alternative ballast materials ...
Machine learning approach for pavement performance prediction

Marcelino, P.; Antunes, M. L.; Fortunato, E. (Taylor & Francis Online, 2019-05-10)

In recent years, there has been an increasing interest in the application of machine learning for the prediction of pavement performance. Prediction models are used to predict the future pavement condition, helping to ...
Smartphone’s sensing capabilities for on-board railway track monitoring: structural performance and geometrical degradation assessment

Paixão, A.; Fortunato, E.; Calçada, R. (Hindawi, 2019-02-12)

Railway infrastructure managers run dedicated inspection vehicles to monitor the geometric quality of the track (among other aspects) to detect irregularities and ensure safe running conditions of railway lines, in accordance ...
Comprehensive performance indicators for road pavement condition assessment

Marcelino, P.; Antunes, M. L.; Fortunato, E. (Taylor & Francis Online, 2018-03-28)

The selection and use of technical parameters and performance indicators plays an essential role in the pavement management process. It is known that if more parameters are used, a more accurate evaluation of pavement ...
Particle morphology’s influence on the rail ballast behaviour of a steel slag aggregate

Delgado, B.; Fonseca, A.; Fortunato, E. (ICE Publishing, 2019-05-17)

The ballast railway layer is one of the main applications of crushed rocks in civil engineering. Environmental concerns have influenced the use of by-products and recycled materials as alternatives to the exploitation of ...
Rock joint topography: three-dimensional scanning and numerical analysis

Resende, R.; Muralha, J.; Ramos, A.; Fortunato, E. (ICE Publishing, 2015-12-23)

Joints are the most defining features of fractured rock masses. It has been well established that joint behaviour is mainly defined by wall topography, which is difficult to measure and define. Previous works have employed ...
Characterization of soil treated with alkali-activated cement in large-scale specimens

Cruz, N.; Rios, S.; Fortunato, E.; Rodrigues, C.; Cruz, J.; Mateus, C.; Ramos, C. (ASTM, 2017-07)

Soil improvement with hydraulic binders is currently used in practice because of the advantages of using the local soil enhancing its geotechnical properties. However, environmental issues related to quicklime applications ...
Some results on the properties and behavior of railway ballast

Fortunato, E.; Paixão, A.; Fontul, S. (CRC Press / Balkema, Taylor & Francis Group, 2017-06)

The ballast layer is one of the most important elements of the railway track playing a key role in its behavior, concerning vertical and horizontal stability. Physical-mechanical properties of ballast ...

Now showing items 61-80 of 173

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