Publications

Influência da corrosão no comportamento pós-fendilhação do betão reforçado com fibras de aço recicladas

O betão reforçado com fibras de aço recicladas (BRFAR) possui elevadas potencialidades técnicas, ambientais e económicas para ser utilizado em aplicações estruturais, constituindo uma solução sustentável que promove a eficiência e durabilidade das estruturas e a sustentabilidade ambiental. A investigação da durabilidade do BRFAR é ainda escassa, nomeadamente, sobre os efeitos da corrosão das fibras no comportamento pré- e pós-fendilhação…

Development of multifunctional sandwich panels for integrated rehabilitation of RC-buildings: characterization of the components

This research work deals with the development of a sustainable multifunctional composite sandwich panel for reinforced concrete (RC) frame buildings built in Portugal until the mid-1980s, which require structural and thermal-comfort rehabilitation. The sandwich panel, aimed specifically for interventions on building envelopes (refurbishment of building facades), is characterized by three main components: (i) thin outer concrete layers reinforced with recycled…

Pull-out tests with CFRP laminates applied according to the ETS/NSM technique

The retrofitting technique of Near-Surface Mounted (NSM) fiber-reinforced polymer (FRP) strips is receiving more attention recently due to many advantages over the externally bonded technique (EBR). However, in some situation is necessary to increase flexural and shear simultaneous. Therefore, to overcome this drawback, a hybrid strengthening technique that combines the advantages of NSM technique and Embedded Through Section (ETS) technique,…

FRCcalc – Software for design of fiber reinforced concrete elements according to MC2010 recommendations

A new software, denominated FRCcalc, was developed for the analysis and design of fiber reinforced concrete (FRC) members based on the recommendations and design guidelines of MC2010. The software is guided for the analysis of FRC cross-sections with and without conventional steel reinforcements, submitted to bending and shear, in order to assess the ultimate and serviceability limit state safety verifications…

Reforço ao corte de vigas em betão armado recorrendo a painéis em micro betão auto compactável reforçado com fibras metálicas de pneus reciclados

No passado recente, o grupo de investigação “Structural Composites” da Universidade do Minho e a empresa CiviTest – Pesquisa de Novos Materiais para a Engenharia Civil, Lda. têm realizado vários estudos experimentais e numéricos avançados, em parceria, que permitiram a aquisição de conhecimento e o desenvolvimento de materiais de matriz cimentícia reforçados com fibras recicladas (BRFR), nomeadamente as provenientes da…

Development of sandwich panels combining sisal fiber-cement composites and fiber-reinforced lightweight concrete

This research proposes the development of an innovative structural panels based on the use of thin outer layers of Sisal Fiber-Cement Composites (SiFCC) together with a core layer of Polypropylene Fiber-Reinforced Lightweight Concrete (PFRLC). The influence of sisal fibers was studied in two different ways, short sisal fibers (50 mm) randomly distributed in the matrix, and long unidirectional aligned sisal…

A new technique for the confinement of rectangular cross section reinforced concrete columns

In this work a new technique aiming an efficient confinement of reinforced concrete (RC) columns of rectangular cross-section is presented. This technique is based on the concept of applying strips of carbon fiber reinforced polymer (CFRP) wet layup sheets with a certain pre-stress level. A mechanical system was developed for pre-stressing the CFRP strips. The experimental program was composed by…

Viscoelastic response of an epoxy adhesive for construction since its early ages: experiments and modelling

Epoxy adhesives have been extensively used in strengthening of reinforced concrete structures. In spite of that, research on the viscoelastic behaviour of these adhesives and its influence on the mechanical behaviour of  strengthened concrete structures is scarce, particularly at the early ages of curing. The main goal of present work is to better understand the tensile creep behaviour of a specific…

Fiber Reinforced Concrete. Part II: Application

The present paper is the second part of two companion papers related with the design and application of fiber reinforced concrete (FRC) in structural elements. It is presented a case study regarding the use of FRC in the development and construction of a new sustainable building system based on the assembly of structural prefabricated sandwich panels formed by thin outer…

Fiber Reinforced Concrete. Part I: Characterization and Design

Fiber reinforced concrete (FRC) is a cementitious material reinforced with discontinuous fibers, with a progressive increase of use in the last decades. However, designer’s reveal some inexperience with the potentialities of this material and with design approach to be used in the dimensioning of FRC structural elements. This paper aims to present in a comprehensive methodology the design recommendations provided…

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