ABSTRACT

Materials from renewable sources have been increasingly used in construction to assist in sustainable development. Therefore, the use of timber becomes an environmentally advantageous solution, especially if used for long-term purposes, such as in structures. In this sense, this study aimed to evaluate the performance of glued-laminated timber frames reinforced in their main connections. The structures were made using timber from the Araucaria angustifolia species and polyurethane adhesive based on vegetable oils. The frames, on a reduced scale, had a pillar height and free span of 2 m and were reinforced in the connections between the roof beams and pillars. The rupture strength values of the structures averaged 38.02 kN, approximately 5.47 times the design load, and represented a 32% increase in strength compared to non-reinforced structures. The displacements did not reach the normative limit for the design load and presented a linear behavior for strengths higher than three times those of the design. The structures presented satisfactory structural behavior and had an improvement in resistance and rigidity caused by the addition of reinforcements.

timber structures; adhesives; mechanical performance; Araucaria angustifolia