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ANÁLISE NUMÉRICA DE VIGAS DE CONCRETO ARMADO COM BARRAS DE GFRP: UMA REVISÃO SISTEMÁTICA DA LITERATURA
DOI:
https://doi.org/10.5216/reec.v20i2.78841Palavras-chave:
Compósitos poliméricos; Durabilidade, Método dos elementos finitos, Polímero reforçado com fibras de vidro, Revisão sistemáticaResumo
RESUMO: A utilização de barras de polímeros reforçados com fibras de vidro (GFRP -Glass Fiber Reinforced Polymer) como substitutas parciais ou totais das tradicionais barras de aço apresenta vantagens significativas para os elementos estruturais, como aumento da capacidade portante. No entanto, a escassez de pesquisas abrangentes sobre esse material e suas propriedades vem levando a desafios significativos na compreensão de seu potencial de uso e consequente disseminação na indústria da construção civil. A falta de investigações aprofundadas e a carência de métodos eficazes para simular o desempenho das barras de GFRP no concreto armado desencorajam sua adoção em construções. Nesse contexto, o presente artigo visa realizar uma revisão sistemática sobre simulações numéricas com o uso de barras de GFRP em vigas de concreto, destacando os métodos mais amplamente empregados nessas simulações. Os principais resultados mostram que as barras de GFRP aumentam significativamente a resistência à flexão das vigas de concreto, mas apresentam menor ductilidade devido ao comportamento frágil. O uso do método dos elementos finitos com diversos software se mostrou eficaz na previsão do comportamento estrutural. Observou-se também uma variação nos valores de módulo de elasticidade das barras, destacando a necessidade de padronização.
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