PSI - Issue 59

Valentin Aleksiievets et al. / Procedia Structural Integrity 59 (2024) 710–717 Valentin Aleksiievets et al. / Structural Integrity Procedia 00 (2019) 000 – 000

716

7

Experimental research with theoretical and normative document methodology (DBN B.2.6-161: 2017, Eurocode 5: 2004) (Table 2) shall be compared. Table 2. Comparison of experimental research with theoretical (formula 7) and normative document methodology (DBN B.2.6-161: 2017, Eurocode 5: 2004). Connection Code a, mm c, mm d, mm E 0 , kH/mm β R k,exp , kH R k,theor , kH δ, % R Ecode , kH δ, % 1 35 35 4.5 5.718 -0.565 1.688 1.533 9.2 1.732 -2.6 2 35 40 4.5 4.937 -0.513 1.744 1.628 6.7 1.732 0.7 3 35 42.5 4.5 4.705 -0.497 1.800 1.658 7.9 1.732 3.8 4 35 45 4.5 4.475 -0.485 1.813 1.676 7.6 1.732 4.5 5 35 47.5 4.5 4.263 -0.474 1.818 1.691 7.0 1.732 4.7 6 35 50 4.5 3.792 -0.469 1.819 1.664 8.5 1.732 4.7 7 40 30 5.5 6.249 -0.607 1.480 1.456 1.6 1.897 -28.2 8 30 30 5.5 6.388 -0.621 1.520 1.430 5.9 1.886 -24.1 9 25 30 5.5 6.400 -0.634 1.440 1.404 2.5 1.770 -22.9 10 20 30 5.5 6.471 -0.672 1.360 1.335 1.8 1.681 -23.6 11 15 30 5.5 6.615 -0.728 1.330 1.244 6.5 1.632 -22.7 12 10 30 5.5 6.835 -0.795 1.270 1.165 8.3 1.265 0.4 13 37 37 4.0 3.805 -0.619 1.438 1.333 7.3 1.636 -13.8 14 37 37 5.0 4.566 -0.436 2.008 1.833 8.7 1.974 1.7 15 37 37 5.5 6.018 -0.390 2.340 2.114 9.7 2.180 6.8 It is established that formula (7) provides better convergence with experimental values than the methodology in current regulatory documents (DBN B.2.6-161: 2017, Eurocode 5: 2004). 5. Conclusions A methodology for experimental studies of nail connections with different thicknesses of outer and middle elements under the action of single short-term loads is presented. Based on experimental studies, the load-bearing capacity of such elements has been established. Deformation diagrams of nail connections of wooden elements under the action of single static loads are constructed. The nature of nail connection failure is described. The optimal nail connections of wooden elements with different thicknesses of the outer and middle elements have been identified. A methodology for determining the bearing capacity of nail connections that shows good convergence with experimental values is proposed. References Babich, Y, Filipchuk, S, Karavan, V., Sobczak-Piastka, J., 2019. Research of basic mechanical and deformative properties of high-strength fast hardening concretes. AIP Conference Proceedings 2077, 020003. Bosak, A., Matushkin, D., Dubovyk, V., Homon, S., Kulakovskyi, L., 2021. Determination of the concepts of building a solar power forecasting model. Scientific Horizons 24(10), 9-16 . Bojok, О. , Vintoniv, І. , 1992. Wood science with the basics of forest commodity science. Kyiv: Publishing by Scientific thought. Da Silva, A., Kyriakides, S., 2007. Compressive response and failure of balsa wood. International Journal of Solids and Structures 44 (25-26), 8685-8717. DBN B.2.6-161, 2017. Constructions of houses and buildings. Wooden constructions. Main provisions. Kyiv: Ukrarchbudinform. 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. DSTU 3129: 2015. (2016). Wood. Methods of sampling and general requirements for physical and mechanical tests of small defect-free samples. Dvorkin, L., Bordiuzhenko, O., Zhitkovsky, V., Gomon, S., Homon, S. (2021). Mechanical properties and design of concrete with hybrid steel