Análise da viabilidade técnica do reforço de estrutura de concreto armado empregando polímeros reforçados com fibras de carbono

Abstract

The primordiality of structural rehabilitation has become increasingly frequent. The usage of concrete did not foresee the appearance of premature degradation in improvements and works of art. Change of usage of the building, increase of the initial load and lack of periodic maintenance are listed among the main responsible for this. Aiming to solve this, the structures of such buildings must be reinforced in order to meet its new demands. In this context, the advent of composite materials reinforced with carbon fibers contributed considerably to this. Besides its high strength and stiffness characteristics, CFRP materials stand out even compared to steel properties on these requirements. Based on this, this work aims to analyze the technical feasibility of structural reinforcement with carbon fibers in a building that has undergone changes in its usage. The dimensioning of the existing structure proceeded to dimensioning the altered structure and the applied reinforcement. In order to allow a broad analysis of the desired experimental evidence, software specific to this application area and use of this material were used. Based on the results obtained, beams and slabs analyzed achieved a satisfactory performance after the application of CFRP reinforcement. The columns, due to its high compression strength did not need reinforcements. It was found that it is essential to have enough compressed concrete to support the increase in load. [resumo fornecido pelo autor]