PSI - Issue 78

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ScienceDirect

Procedia Structural Integrity 78 (2026) 253–260

© 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 XX ANIDIS Conference organizers Keywords: Type your keywords here, separated by semicolons ; This paper presents the experimental results of mechanical test on fully threaded inclined screws when combined with different types of hardwood. Push-out specimens with symmetrical configuration were realized using glulam beams and boards made of three different species of Italian hardwood such beech, chestnut and beech-silver fir which constituted respectively the central and side members of the samples. Short term tested under quasi-static monotonic loading were carried out according to EN 26891. The main aim was to define the fasteners’ stiffness, strength, static ductility and failure modes and so, to assess their goodness for the timber-to-timber composite (TTC) floor use. Outcomes are presented and discussed. Screws in hybrid beech-silver fir demonstrated significantly higher ultimate load, stiffness, and yield force than those in homogeneous beech and chestnut. 1. Introduction In recent years, timber has gained widespread acceptance as a structural material, owing to its well-established mechanical properties, environmental sustainability, high prefabrication potential, which enables reductions in both cost and construction time, and its low self-weight compared to masonry and concrete, which significantly reduces seismic demand (Tomei et al., 2023) Despite their advantages, structural timber use is still concentrated on a narrow range of softwood species, mainly fir and spruce, which dominate engineered wood product (EWP) production. Many hardwoods remain underexploited, XX ANIDIS Conference Push-out tests on timber-to-timber composite systems made of hardwood Martina Sciomenta a, *, Gloria Rosone a , Pasqualino Gualtieri a , Alfredo Peditto a a University of L’Aquila, Department of Civil, Construction-Architecture & Environmental Engineering, Piazzale E.Pontieri 1, (Monteluco di Roio) L’Aquila 67100, Italy Abstract

* Corresponding author. Tel.: 0862 434330; E-mail address: martina.sciomenta@univaq.it

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 XX ANIDIS Conference organizers 10.1016/j.prostr.2025.12.033