Avanços no estudo experimental e analítico de vigas de concreto armado reforçadas ao cisalhamento com PRF – um estudo na literatura

Maicon de Freitas Arcine

ORCID iD Universidade Estadual de Maringá (UEM) Brasil

Nara Villanova Menon

ORCID iD Universidade Estadual de Maringá (UEM) Brasil

Resumo

Por apresentar alta resistência, leveza e propriedades não corrosivas, o Polímero Reforçado com Fibras (PRF) é um material compósito inovador e tem sido usado em muitas estruturas de concreto armado como reforço. Esse material é composto por fibras, sejam elas de carbono, vidro, basalto ou aramida, embebidas em uma matriz polimérica. Uma viga reforçada com tal material ao cisalhamento possui diversos modos de falha. Entre eles, destaca-se o descolamento da interface devido a fissura crítica de cisalhamento, o que torna o estudo mais complexo. Baseado em estudos existentes da literatura, este trabalho tem por objetivo revisar e apresentar os avanços e aplicações dos materiais PRF no reforço de vigas de concreto armado sujeitas ao cisalhamento. De início, foram introduzidas as propriedades fundamentais do PRF, seu modo de fabricação e suas principais formas de aplicação ao cisalhamento. Posteriormente, os principais estudos experimentais e analíticos sobre o assunto são revistos, desde o início da utilização dos materiais compósitos até atualmente, destacando os avanços mais relevantes de cada pesquisa. Em todos os estudos, o PRF se mostrou bastante eficiente, no entanto, a falha por descolamento ainda foi um grande problema. Esse fato fez com que os pesquisadores desenvolvessem diversos métodos de ancoragem, os quais foram eficazes em aumentar a eficiência do reforço. Essa revisão foi útil para compreender e melhorar a forma como os profissionais de engenharia aplicam o reforço ao cisalhamento com PRF.

Palavras-chave


cisalhamento; material compósito; reforço; vigas de concreto armado


Texto completo:

Referências


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DOI: http://dx.doi.org/10.18265/1517-0306a2021id5446

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