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Nomenclatura Unesco > (33) Ciencias Tecnológicas

Mostrando recursos 341 - 360 de 2,138

341. Desenvolvimento e caracterização de novos extensómetros de embeber no betão - Helder Sousa; Carlos Félix; Joaquim Figueiras; António Torres Marques; Pedro Vieira; José Luís Soares Esteves

342. Seismic Analysis of a Building Block. Bulletin of Earthquake Engineering - Nuno Neves; António Arêde; Aníbal Costa
This paper reports on the study of the seismic response of an urban building block located in Faial, a town of the Horta Island of the Azores, Portugal. The work fits within the framework of studying strengthening schemes suitable for the reconstruction process of a town damaged by an earthquake action and includes numerical modelling of all the building blocks with calibration of material and structural parameters based on ambiente vibration tests. The study aims at understanding a number of issues that are likely to influence the global behaviour of the block and the local response of individual buildings, namely the...

343. Out-of-plane behaviour of existing stone masonry buildings: experimental evaluation - Costa, Alexandre A.; António Arêde; Aníbal Costa; Carlos Sousa Oliveira
Masonry structures can be considered as the simplest type of structures concerning its assemblage but, at the same time, it is one of the most complex construction materials in terms of mechanical properties and correct behaviour assessment. In this context, the work herein presented aims at describing an experimental testing campaign recently carried out in order to characterize the out-of-plane behaviour of traditional masonry constructions. Taking advantage of the existence of a traditional two-storey masonry building abandoned after the 1998 Azores earthquake, several in-situ testswere defined and performed with the application of quasi-static cyclic loads at the building top level in...

344. Retrofit of RC Hollow Piers with CFRP Sheets - Delgado, Pedro; António Arêde; Nelson Vila Pouca; Patricio Rocha; Aníbal Costa; Raimundo Delgado
Hollow bridge piers, particularly those built before the seventies, often have insufficient shear capacity due to inadequate transverse reinforcement details. Therefore, special attention must be given to this very important aspect when reinforced concrete (RC) piers with hollow sections are analysed and retrofitted. This paper covers the experimental analysis of retrofit solutions using CFRP sheets along the piers’ entire height to prevent shear failure. Experimental cyclic tests were carried out to evaluate the shear retrofit strategy efficiency on a set of RC piers with square hollow sections. This work also covers the study of design procedures for CFRP shear retrofitting...

345. Multi-master Profibus DP modelling and worst case analysis-based evaluation - Salvatore Monforte; Eduardo Tovar; Francisco Vasques

346. Enciclopedismo venezolano del siglo XVIII: de la cosmología filosófica al encanto de las máquinas - Knabenschuh de Porta, Sabine
Este artículo busca evaluar las exposicionesfisicas y astronómicas que el filósofo, teólogo y enciclopedista venezolano Fray Juan Antonio Navarrete presenta en su Arca de Letras y Teatro Universal, redactada a partir de 1783. Se evidencia, junto con el abandono de los temas pertenecientes a la cosmología escolástica y de la polémica propiamente filosófica entre escotistas y tomistas, un especial interés por los avances tecnológicos derivados de la Nueva Ciencia. Con ello se muestra que, terminando el siglo XVIII, la superación del escolasticismo ha encontrado finalmente su oportunidad de libre expresión y desenvolvimiento entre los intelectuales de la Venezuela colonial.

347. Strengthening and Reinforcement of Concrete Beams by the Application of CFRP Using the Filament Winding Method - Pedro Vieira; Nuno Loureiro; José Luís Soares Esteves; António Torres Marques

348. Mechanical Characterisation of Natural Reinforced Plastics - Pedro Vieira; Cristina Romão; António Torres Marques; José Luís Soares Esteves

349. A formação tecnológica nos cursos de Ciências da Informação e da Documentação em Portugal : Ronaldo Ferreira de Araújo, Armando Malheiro da Silva, Marlene Oliveira - Araújo, Ronaldo Ferreira de; Silva, Armando Barreiros Malheiro da; Oliveira, Marlene
Discusses the science of information in Portugal with a focus on technology training in this area. Presents the preliminary results of a survey that aims to draw the landscape of information technology and communication while content training in information science in this country. For both analyzes the technological component in the teaching field from seven courses from undergraduate programs in information science and documentation of Portugal. From the document analysis characterizes the technological bases of the courses through the menus, objectives and program content of the disciplines of technology and also analyzes the teaching methods and evaluation procedures employed. The...

350. Mechanical Characterisation of Woll Fibres for Reinforcing of Composite Materials - Sérgio Gonçalves; Pedro Vieira; José Luís Soares Esteves

351. Mechanical Characterisation of Sisal Fibres for Reinforcing of Composite Materials with several different surface treatments - Cristina Romão; Pedro Vieira; José Luís Soares Esteves

352. Guidelines for a quality control procedure to ensure sound strengthening and rehabilitation of concrete structures using FRP - José Luís Soares Esteves; António Torres Marques

353. Experimental testing, numerical modelling and seismic strengthening of traditional stone masonry: comprehensive study of a real Azorian pier - Alexandre A. Costa; António Arêde; Aníbal Costa; João Guedes; Bruno Silva
Stone masonry is one of the oldest building techniques used worldwide and it is known to exhibit poor behaviour under seismic excitations. In this context, this work aims at assessing the in-plane behaviour of an existing double-leaf stone masonry pier by experimental testing. Additionally, a detailed 3D finite element numerical analysis based on micro-modelling of the original pier is presented (fully describing the geometry and division of each individual elements, namely infill, blocks and joints) aiming at simulating the experimental test results. This numerical strategy can be seen as an alternative way of analysing this type of constructions, particularly useful for laboratory...

354. Reabilitação de Estruturas de Betão Reforçadas com CFRP Usando o Método de Enrolamento Filamentar - Nuno Loureiro; Pedro Vieira; João Bento; José Luís Soares Esteves

355. Single Filament Mechanical Characterisation of Hemp Fibres forReinforcing of Composite Materials - Cristina Romão; Pedro Vieira; Francisco Peito; António Torres Marques; José Luís Soares Esteves

356. Fatigue Behaviour of Reinforced Concrete Beam Strengthened With a CFRP Reinforced System - José Luís Soares Esteves; Pedro Vieira; António Torres Marques

357. Optimizing the Strengthening and Reinforcement of Concrete Beams by the use of CFRP Filament Winding - Pedro Vieira; José Luís Soares Esteves; António Torres Marques

358. Análise Experimental de Tensões em Materiais Compósitos Utilizando sensores de Bragg Embebidos - Carlos Ramos; José Luís Soares Esteves; António Torres Marques

359. Behaviour of Wool Fibres Reinforced Composites Materials - Sérgio Gonçalves; José Luís Soares Esteves

360. Ligações Adesivas na Industria Metálomecânica - José Luís Soares Esteves

 

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