Sustainable Constructions: reducing deflections in timber beams by strengthening with composite materials
DOI:
https://doi.org/10.46421/enarc.v9i1.6507Keywords:
Carbon fiber reinforced plastic, Glass fiber reinforced plastic, Low-carbon material, creep, cold flowAbstract
Wood is a renewable construction material that presents excellent mechanical strength and low specific weight, leading to a high resistance index, superior to concrete and steel. Its production generates low environmental impact and consumes little energy, being a low-carbon material. However, wood is susceptible to creep, an important behavior to understand in structures subjected to long-term loads. This article experimentally evaluates the deflections and the effect of creep in pinus and maçaranduba wood beams strengthened by carbon fiber and fiberglass composites. The results demonstrated the effectiveness of the strengthening in reducing deflections. Although the strengthened beams present increases in the creep coefficients over time, exhibiting higher values, this behavior does not necessarily mean worse viscoelastic performance, but rather that the parameter is sensitive to very significant initial reductions in deflection.
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