Behavior of BFRP-strengthened reinforced concrete beams under cyclic load

• Ano de defesa: 2025
• Autor(a) principal: Milagres, Geysiane Faria Barros
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade Federal de Viçosa; Engenharia Civil
• Palavras-chave em Português: Pontes de concreto - Testes; Vigas de concreto - Testes; Basalto; Polímeros; ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS DE CONCRETO
• Link de acesso: https://locus.ufv.br/handle/123456789/34885; https://doi.org/10.47328/ufvbbt.2025.422

Reinforced concrete structures are susceptible to various types of deterioration, leading to the emergence of different pathological manifestations. Through the bibliometric research conducted, it is clear that the need for repair and reinforcement interventions has become constant, either for restoring or increasing the load-bearing capacity of the structure. For reinforced concrete bridges, cyclic loading is the most effective way to simulate the real conditions these structures are exposed to, meaning interventions must be effective for this type of demand. Many materials and techniques have been developed in recent years in the field of reinforced concrete construction, and selecting these involves analyzing various factors. Therefore, it is important that, when performing interventions, inspection and monitoring criteria are established for the structure, defining methodologies for the acceptability of the intervention and assessing the progressive damage in repaired and reinforced structures. In this context, this work evaluates the strengthening of reinforced concrete beams using BFRP (Basalt Fiber Reinforced Polymers), subjected to cyclic loading through an experimental program, examining the deterioration evolution of the samples over cycles, the strength behavior, the increase in load-bearing capacity, and the application of non-destructive testing as quality control techniques for the intervention and for the recovery level and damage progression during the test. Based on the analyses and results, it was observed that the use of BFRP led to an increase in the load capacity of the samples, also demonstrating good efficiency when subjected to fatigue loading, as the same recovery level was achieved for different levels of fatigue and also for monotonic loading. Furthermore, non- destructive tests proved to be effective methodologies for verifying and controlling the damage during the tests. Keywords: Fatigue. Repair material. Retrofitting. Structural reinforcement. Damage.