20.500.12556/DiRROS-15796 Brittle failure of laterally loaded self-tapping screw connections for cross-laminated timber structures The performance of structural timber connections is of utmost importance since they control the global response of the building. A ductile failure mechanism on the global scale is desirable, especially in the design of structures in seismic areas, where dissipative components in which ductile failure modes need to be ensured are considered. Therefore, the knowledge of possible brittle failure modes of connections is crucial. The paper investigates the brittle failures of laterally loaded dowel-type connections in cross-laminated timber subjected to tensile load in a lap joint configuration through experimental investigations and analytical estimations. A set of 13 different test series has been performed with fully threaded self-tapping screws of 8 mm diameter and different lengths (40 to 100 mm) in cross-laminated timber composed of 3 or 5 layers (layer thickness range from 20 to 40 mm), giving rise to the activation of different brittle failure modes at different depths. Plug shear was among the most typically observed failure modes. A previously proposed model for the brittle capacity was applied to the tested connections at the characteristic level. As shown by the performed statistical analysis, the existing model is not reliable and mainly unconservative. A very low performance is observed (CCC = 0.299), but with a good correlation (c = 0.750) for the tests in the parallel direction. Further research work is required to improve the current model predictions and to gain a better understanding of the underlying resisting mechanisms. cross-laminated timber dowel type fasteners connections brittle failure experimental investigations self tapping screws open access križno lepljen les spoji s paličastimi veznimi sredstvi krhke porušitve eksperimentalni preskusi vijaki odprti dostop true false true Elsevier Angleški jezik Slovenski jezik © 2022 The Author(s). Published by Elsevier Ltd. Neznano 2022-11-17 12:53:32 2023-05-31 08:49:20 2023-06-15 09:51:54 0000-00-00 00:00:00 2022 0 0 Nasl. z nasl. zaslona; Opis vira z dne 30. 6. 2022; Št. članka: 114556; str. 1-11 Vol. 266 Sep. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-06-20 624 1873-7323 10.1016/j.engstruct.2022.114556 113322755 https://www.sciencedirect.com/science/article/pii/S0141029622006629 1 1af92f11-6666-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20896 RAZ_Azinovic_Boris_2022.pdf RAZ_Azinovic_Boris_2022.pdf 1 3E0FE9779C97A7E3BC501EC6F8123EB4 08fcca9d02e55ba6145965cfc1a193ecfe005bf5f71b1aa8e8e717f68f9c254d 5edeb57d-76fa-11ed-8925-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21024 Zavod za gradbeništvo Slovenije 0 0 0