Issue 39

A. Lokaj et alii, Frattura ed Integrità Strutturale, 39 (2017) 56-61; DOI: 10.3221/IGF-ESIS.39.07 61 C ONCLUSIONS he test results of bolt connections of squared and round timber with embedded steel plates loaded at different angles to the grain give similar values of resistance, which is higher than the load capacity determined according to the Eurocode 5. It means that the equations for determining the resistance of joints according to Eurocode 5, which were derived for squared timber, can be applied to the joints of round timber. Fracture destruction is principal especially for wood joints with higher density. That fact was confirmed in the static tests. A CKNOWLEDGEMENT his outcome has been achieved with funds of Conceptual development of science, research and innovation assigned to VŠB - Technical University of Ostrava by Ministry of Education Youth and Sports of the Czech Republic in 2016 (No. IP2216611). R EFERENCES [1] Gandelová, L., Horáček, P., Šlezingerová, J., Wood Science (in Czech), Brno, (2009). [2] Eurocode 5- 2004: Design of timber structures - Part 1-1: General – Common rules and rules for buildings. [3] Klajmonová, K., Lokaj, A., Round timber bolted joints with mechanical reinforcement. Advanced Material Research. 838-841 (2014 )629-633, DOI: 10.4028 / [4] Lokaj, A., Klajmonová, K., Round timber bolted joints exposed to static and dynamic loading, Wood Research, 59 (2014) 439-448. DOI: 10.4028/ / [5] Lokaj, A., Vavrušová, K., Contribution to the probabilistic approach of the impact strength of wood. Engineering Mechanics (2011) 363 - 366. [6] Lokaj, A., Klajmonová, K., Carrying capacity of round timber bolted joints with steel plates under static loading. Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series. 12 (2012) 100–105. DOI: 10.2478/v10160-012-0023-5. [7] Johansen, K. W., Theory of timber connections. International Association of Bridge and Structural Engineering, (9) (1949) 249-262. [8] Šmak, M., Straka, B., Development of new types of timber structures based on theoretical analysis and their real behaviour, Wood Research, 59 (2014) 459-470. [9] Malo, K.A., et al., Fatigue tests of dowel joints in timber structures, Part II: Fatigue strength of dowel joints in timber structures. In: Nordic Timber Bridge Project, Nordic Timber Council AB, Stockholm, Sweden (2002). [10] Blass, H. J., Schädle, P., Ductility aspects of reinforced and non-reinforced joints, Engineering Structures, 33 (2011) 3018-3026. [11] Smith, I., et al., Fracture and fatigue in wood. John Wiley  Sons, England, (2013). T T