Preparation and Conduct of Experimental Research of Reinforced Wooden I-Beams

The purpose of the experimental research, presented in the article is to study the work, determine the load-bearing capacity and the nature of the destruction of composite fiberglass-reinforced wooden beams with OSB wall with solid belts and their comparison. The object of the research is laminated fiberglass-reinforced wooden beams of I-beam cross-section with an OSB wall and solid belts for covering buildings and structures. To achieve this goal, we have made six composite fiberglass-reinforced wooden beams of an I-shaped cross-section with an OSB wall and solid belts. The first two beams were made with single reinforcement at the top and at the bottom, the second and the third beams were made with double reinforcement at the top and at the bottom, the fifth was made with symmetrical single reinforcement and the sixth one–with symmetrical double reinforcement, so as to make it possible to study their operation under static loads. Additionally, six beams with the same parameters but of smaller size were made to compare deflections from loading with one force. To determine physical and mechanical characteristics of pinewood, 9 specimens of a rectangular parallelepiped shape for compression tests and 3 samples of beams for bending tests were made from the same wood simultaneously with the experimental beams. To determine the characteristics of the oriented strand board, 8 samples were tested for compression along and across the fibers, 12 samples were tested for bending along and across the fibers, and the dimensions of the bending samples were increased, as well as 3 samples were tested on other test rigs. Also, tensile tests were performed according to the method of tensile tests of steel reinforcement to determine the tensile strength of fiberglass reinforcement and for this purpose, we prepared 3 samples of the same reinforcement that was used for the manufacture of beams.