20.500.12556/RUL-188001 Preiskave dvostrižnih lesenih spojev z uporabo bukovih moznikov diplomsko delo Investigation of Double-Shear Timber Joints Using Beech Dowels Diplomska naloga obravnava mehansko obnašanje dvostrižnih lesenih spojev z bukovimi mozniki. Eksperimentalno so bili preizkušeni spoji iz smrekovih in bukovih elementov, povezani s kupljenimi in lastno izdelanimi mozniki premera 12 mm. Preizkusi so bili izvedeni pri obremenjevanju vzporedno in pravokotno na vlakna zunanjih-bočnih elementov. Na podlagi krivulj sila–pomik so bili določeni največja sila, togost spoja in pomik pri največji sili, rezultati pa so bili dopolnjeni z meritvami vlažnosti in gostote lesa. Povezave med največjo silo, togostjo in gostoto so bile ovrednotene s Pearsonovim korelacijskim koeficientom. Nosilnost spojev je bila izračunana po določilih končnega osnutka 2. generacije Evrokoda 5 (2G EC5) z različnimi kombinacijami eksperimentalno in računsko določenih vrednosti vtisne trdnosti ter upogibne odpornosti moznikov. Primerjava je pokazala, da 2G EC5 pri določitvi vtisne trdnosti in upogibne odpornosti podaja konservativnejše vrednosti od eksperimentalnih, zato so bile tudi računsko določene nosilnosti nižje od eksperimentalnih in s tem na varni strani. Vizualni pregled prerezanih preizkušancev je pokazal predvsem način porušitve z nastankom štirih značilnih lomnih mest v mozniku. Rezultati potrjujejo uporabnost bukovih moznikov v lesenih spojih, hkrati pa kažejo na potrebo po nadaljnjih raziskavah večjih vzorcev in natančnejšem ovrednotenju porušnih mehanizmov. The diploma thesis investigates the mechanical behaviour of double-shear timber joints with beech dowels. Joints made of spruce and beech members were experimentally tested using commercially available and custom-made dowels with a diameter of 12 mm. The tests were carried out under loading both parallel and perpendicular to the grain of the outer members. Based on the force–displacement curves, the maximum load, joint stiffness and displacement at maximum load were determined. The results were supplemented by measurements of wood moisture content and density. The relationships between maximum load, stiffness and density were evaluated using Pearson’s correlation coefficient. The analytical load-carrying capacity of the joints was calculated according to the provisions of the final draft of the 2. generation of Eurocode 5 (2G EC5) using different combinations of experimentally and analytically determined values of embedment strength and dowel bending resistance. The comparison showed that 2G EC5 provides more conservative values for embedment strength and bending resistance than those obtained experimentally, resulting in analytically determined load-carrying capacities that were lower than the experimental values and therefore on the safe side. Visual inspection of a sectioned specimen revealed a failure mode characterised by the formation of four distinct fracture points in the dowel. The results confirm the applicability of beech dowels in timber joints, while also indicating the need for further research involving larger sample sizes and a more detailed evaluation of failure mechanisms. diplomske naloge leseni mozničeni spoji bukovi mozniki dvostrižni spoji nosilnost spojev Evrokod 5 graduation thesis timber dowel connections beech dowels double-shear connections connection loadcarrying capacity Eurocode 5 true false false [J. Vulić] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-17 08:46:28 2026-09-17 08:46:33 2026-09-22 11:47:54 0000-00-00 00:00:00 2026 0 Ljubljana 2026 Ljubljana 1 spletni vir (1 datoteka PDF (XI, 44 str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 624.011.1:674.028:620.1(043.2) 182409 291983875 23149.pdf 23149.pdf 1 11127C59655890BCA19E1C6CBDB550E9 f73598e409f512c49ba83bf6f0ffc1febeafe0a581e1b9c2a04de5d6fafd866c 7b51433c-b263-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=247852 Fakulteta za gradbeništvo in geodezijo 0 0 0