The stress-strain behavior of joint components in the surrounding of oak dowels

0509933 - ÚTAM 2020 RIV US eng A - Abstrakt
Milch, J. - Suchomelová, P. - Hasníková, Hana - Hataj, M. - Brabec, M. - Kunecký, Jiří
The stress-strain behavior of joint components in the surrounding of oak dowels.
Proceedings of the 62nd International Convention of Society of Wood Science and Technology. Monona: Society of Wood Science and Technology, 2019. s. 320-321. ISBN 978-0-9817876-9-5.
[International Convention of Society of Wood Science and Technology /62./. 20.10.2019-25.10.2019, Tenaya Lodge]
Grant CEP: GA TA ČR(CZ) TJ01000412
Institucionální podpora: RVO:68378297
Klíčová slova: wood * dowel * capacity * grain orientation * construction
Obor OECD: Construction engineering, Municipal and structural engineering

The timber structures cannot do without traditional all-wooden joints, especially, when historically valuable constructions are being reconstructed. The connections are usually the masterpieces that testify to the high carpentry skills and knowledges of the overall mechanical behavior. The mutual position of joint components is most commonly fixed by means of wooden dowels. However, the know-how for designing of these traditional joints remained only in the carpentry masters' mind and they were forwarded by long-term experiences to following generations. Therefore, the authors deal with the mechanical behavior of oak dowels within a comprehensive project granted by Technology agency of Czech Republic. This study addresses issue of missing available information about deformations experienced by joint components in the surrounding of oak dowels. The timber joint components made from Norway spruce (Picea Abies L. Karst.) were connected using cylindrical wooden dowels with diameter of 20, 24 and 30 mm made from English oak (Quercus robur L.). The mechanical force acting in double-shear mode was applied as a tensile loading parallel, resp. as a compressive loading parallel, perpendicular and at 45o to timber grain direction within the joint components. The experiments were done on full-scale specimens meeting the requirements listed in European standard EN 383. A statistically appropriate number of specimens (almost 300) were tested. The results characterize the timber embedment strength and joints load-bearing capacity, which are necessary for designing of structures according to the limit states theory.
Trvalý link: http://hdl.handle.net/11104/0307863