Projeto de lajes maciças de concreto com barras não metálicas
Abstract
Reinforced concrete slabs are very common elements across the various types
of constructions. In general, their reinforcement is made up of steel bars, which
posses high tensile strength, compensating for concrete’s deficiency in resisting
such force. However, this material also has some desavantages, with its
susceptibility to corrosion and high self-weight being two of the most prominent.
Consequently, alternative materials are increasingly gaining traction in the
market, which aimes for improved performance with reduced resource
expenditure. In this context, glass fiber reinforced polymer (GFRP) bars have
been under study as substitutes for steel reinforcement in concrete slabs due to
their advantages such as low self-weight, high corrosion resistence, and
versatility in geometry and machanical properties. Therefore, this work undertook
the stuctural analysis of concrete slabs reinforced with GFRP bars. To achive this,
slab modulations with different values of fck, spans, and environmental
aggressiveness class were created. Based on these modulations, their
dimensions were carried out, making it possible to compare the weight of
reinforcement and concrete consumption between slabs reinforced with GFRP
and conventional steel, aiming to analyze the possible reduction in the use of
resources and the viability of this new material in the current market. As a result,
it was found that slabs reinforced with fiberglass bars have similar values to slabs
reinforced with steel, especially for smaller spans, which shows that they are a
promising alternative for structural design.
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