Proposta de novo elemento estrutural a base de oriented strand lumber

Abstract

The objective of this study was to produce and determine the values of shear stress and deformation in short beams produced with Eucalyptus sp wood tables. and Pinus sp. and core made of blocks produced based on oriented strand lumber panel – OSL from Pinus sp. The objective was also to determine the technological properties of solid wood from Eucalyptus sp. and Pinus sp. and blocks made from oriented strand lumber panel – OSL from Pinus sp. The results provided the understanding that wood from eucalyptus and pine species can be used in the manufacture of glued laminated elements. The OSL block presented apparent density and shear resistance parallel and perpendicular to the fibers superior to those of the wood from which it originated. To determine the shear stress, the beams were subjected to the three-point bending test in accordance with NBR 7190/2022. To capture the deformation, strain gauges were installed on the lower blade of the elements. The glulam beams showed the highest shear strength values. The glulam beams and full-web beams and type ‘I’ beams with eucalyptus wood tables presented the highest resistance values in the study. Type ‘I’ beams with tables of both species as well as full-web beams with eucalyptus wood tables showed the lowest deformations in the study. The eucalyptus wood glulam beams and the full-core beams with pine tables showed the greatest deformations in the study. The 'I' type beams and the full core beams with pine wood tables were those that presented the lowest resistance in the study. In this way, it was possible to infer that the core element influences the element as a whole, providing rigidity, energy storage and force displacement, attesting to the efficiency of the beams produced in this assembly configuration.