Abstract
ABSTRACT This study aimed to present a solution in glued laminated timber to replace frame structures built in reinforced concrete and metallic structure, which are common in agricultural buildings in western Parana such as those destined to laying poultry house building by agricultural cooperatives. Structural behavior of frames build from Araucaria angustifolia glued boards and vegetable oil-based polyurethane adhesive was evaluated. Tests were carried out to characterize wood and adhesive to obtain verification/sizing parameters. Initially, a full-scale structural project was conducted to meet standard laying poultry house specifications. Afterwards, five units of straight three-articulated frames on a 1:2.5 reduced scale were designed, built, and subjected to strength tests until breaking. They were built with a 2-meter free span and a 15° slope, suitable for using metal roof tiles. The average for structure ultimate strength was 4.14 times the design load. Structures had satisfactory mechanical performance and displacements lower than those recommended by NBR 7190 (1997) standard (ABNT). Therefore, building glued frames with Parana pine boards and vegetable oil-based glue is technically feasible.
Highlights
Construction has wide participation among economic activities using natural resources
After technological improvement combined with industrialization process, wood began to be benefited so that its shortcomings would be mitigated and its qualities enhanced. In this context, glued laminated timber (GLT) has arisen, which is a wood product formed by wooden boards glued together with different types of adhesives (Segundinho et al, 2017; Terezo et al, 2019)
The main materials used in the experiment were Araucaria angustifolia wood from reforestation, aged 30 years, and a commercial bi-component vegetable oil-based adhesive named Kehlfix-duo
Summary
Construction has wide participation among economic activities using natural resources. Concrete, and wood are some of the most used materials. Wood stands out as being a resource with the lowest carbon emission and artificial energy consumption (Silva et al, 2015; Techio et al, 2016; Paiva Filho et al, 2018). After technological improvement combined with industrialization process, wood began to be benefited so that its shortcomings would be mitigated and its qualities enhanced. In this context, glued laminated timber (GLT) has arisen, which is a wood product formed by wooden boards glued together with different types of adhesives (Segundinho et al, 2017; Terezo et al, 2019)
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