PSI - Issue 73

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect

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ScienceDirect

Procedia Structural Integrity 73 (2025) 38–44

23rd International Conference on Modelling in Mechanics 2025 Timber Semirigid Frame Connection with Improved Deformation Capacity and Ductility Marek Johanides 1* , Antonin Lokaj 2* 1 Department Centre of Building Experiments, Faculty of Civil Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic marek.johanides@vsb.cz 2 Department of Structures, Faculty of Civil Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic; antonin.lokaj@vsb.cz Abstract The present study addresses the innovation and improvement of the design solution for a frame connection using two selected types of fasteners. All specimens were fabricated from glued laminated timber. The connection methods included dowel-type mechanical fasteners (a combination of bolts and dowels) and fully threaded screws. The primary aim of the research was to replace the traditional solution—commonly used dowel-type fasteners—with a more modern, faster, and more efficient alternative in order to enhance the load-bearing capacity, ductility, and deformation performance of this type of frame connection. This study also sought to provide a detailed evaluation of the mechanical properties of the glued laminated timber and fasteners used, to enable a comprehensive assessment of the proposed design solution. For the experimental program, the selected frame connection consisted of two struts and a cross-member. Dowel-type mechanical fasteners and combinations of bolts and dowels were applied; however, in addition to these commonly used solutions, fully threaded screws were also implemented. The article describes the use of static destructive testing to determine the ductility of the connection, considering different variations in the reinforcement of individual segments of the connection system. In the first variation, the frame components were not reinforced. In the second, the cross member was reinforced with two fully threaded screws. In the third, both the webs and the cross-member were reinforced with two fully threaded screws. The ductility values obtained from these variations were compared with one another, following the procedure prescribed by the currently valid standard. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organizers © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the event organizers

* Corresponding author. Tel.: +421 910 274 858; E-mail address: marek.johanides@vsb.cz

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of 23rd International Conference on Modelling in Mechanics 2025 organizers

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the event organizers 10.1016/j.prostr.2025.10.007