PSI - Issue 36

Svyatoslav S. Gomon et al. / Procedia Structural Integrity 36 (2022) 217–222 Gomon S. et al./ Structural Integrity Procedia 00 (2021) 000 – 000

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Table. Fracture loads of the studied glued wood beams. Sample name

Destructive torque M, kN · m

GB-A GB-B

23.85 22.05 22.95 26.55 29.25 31.95 33.75

GRB-12C GRB-12A GRB-12B GRB-16A GRB-16B

4. Conclusions 1. The values of relative deformations of different wood layers, as well as steel and composite reinforcement in the compressed and stretched zones of reinforced and non-reinforced glued beams at different load levels are determined. 2. Before the loss of strength in non-reinforced glued wood beams, the formation of folds in the compressed zone was observed, and the fracture was accompanied by a significant fracture of the lower boards. The nature of the fracture of the combined reinforced beams was noticeably different. All of them fractured by forming one significant longitudinal crack, which began at one end and ran approximately along the boundary of the compressed and stretched areas along the neutral line for more than half the span of the beams. During this, no folding or breaking of the bottom board in the reinforced samples was observed. 3. Due to the combined reinforcement it was possible to increase the strength of glued wood bending elements by 53%. References Anshari, B., Guan, Z. W., Wang, Q. Y., 2017. Modelling of Glulam beams pre-stressed by compressed wood. Composite Structures 165, 160 – 170. Betts, S.C., Miller, T. H., Cupta, B., 2010. Location of the neutral axis in wood beams: A preliminary study. Material Science and Engineering 5, 173-180. Gomon, S., Pavluk, A., 2017. Study on working peculiarities of glue laminated beams under conditions of slanting bending. Underwater technologies 7, 42-48. Gomon, S., Pavluk, A., Gomon, P., Sobczak-Piastka, J., 2019. Complete deflections of glued beams in the conditions of oblique bend for the effects of low cycle loads. AIP Conference Proceedings 2077, 020021. Gomon, S. S., Polishchuk, M., Homon, S., Gomon, P., Vereshko, O., Melnyk, Yu., Boyarska, I., 2020. Rigidness of combined reinforced glued wood beams. AD ALTA: Journal of Interdisciplinary Research 11(1), 131-133. De la Rosa García, P., Escamilla, A.C., González García, M.N., 2013. Bending reinforcement of wood beams with composite carbon fiber and basalt fiber materials. Composites Part B: Engineering 55, 528-536. Donadon, B.F., Mascia, N.T., Vilela, R., Trautwein, L.M., 2020. Experimental investigation of Glued-Laminated wood beams with Vectran-FRP reinforcement. Engineering Structures 202, 109818. EN 380: 2008. Wood is constructional. General guidelines for static load test methods. Eurocode 5: 1995. Design of wood structures. Part 1.1. General rules and rules for buildings. Patent № 135229 UA, MPK E04S 3/12 (2006.01). Roshchina, S., Lukin, M., Lisyatnikov, M., Koscheev, A., 2018. The phenomenon for the wood creep in the reinforced glued wooden structures. MATEC Web of Conferences 245, 03020. Sobczak-Piastka, J., Gomon, S.S., Polishchuk, M., Homon, S., Gomon, P., Karavan, V., 2020. Deformability of glued laminated beams with combined reinforcement. Buildings 10(5), 92. Soriano J., Pellis, B.P., Mascia, N.T., 2016. Mechanical performance of glued-laminated wood beams symmetrically reinforced with steel bars. Composite Structures, 150, 200-207. SP 64.13330, 2011. Wood structures. Updated edition of SNiP II-25-80. 92p. Subramanian, N., 2010. Sustainability of RCC structures using basalt composite rebars. The Master Builder 12(9), 156-164. Vahedian, A., Shrestha, R., Crews, K., 2019. Experimental and analytical investigation on CFRP strengthened glulam laminated wood beams: full-scale experiments. Composites Part B: Engineering 164, 377 – 389. Wdowiak-Postulak, A., 2020. Natural fibre as reinforcement for vintage wood. Materials 13(21), 4799.