PSI - Issue 81

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ScienceDirect

Procedia Structural Integrity 81 (2026) 499–503

VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Work of solid wooden beams under prolonged moisture Mykola Roshchuk a , Sviatoslav Homon a, *, Petro Gomon a , Svyatoslav Gomon a , Nataliia Ilchuk b ,

Dmytro Husachuk b , Dmytro Y. Kysliuk b , Inna Parfentyeva b a National University of Water and Environmental Engineering, Soborna 11, 33000 Rivne, Ukraine b Lutsk National Technical University, Lvivska 75, 43018 Lutsk, Ukraine

© 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers Keywords: wood, beam, bearing capacity, load, fresh and marine environment, bending, stress-strain state, long-term moisture. Abstract The methodology of experimental studies of pine and spruce wooden beams of solid section under prolonged wetting in fresh and marine environments under short-term loads is presented. Experimental studies were conducted under the following operating conditions. Based on the results obtained, averaged values of the bearing capacity were determined. The features of the work and the nature of the destruction of bending elements after prolonged wetting are presented. It is established that the influence of fresh and marine water environments significantly worsens the bearing capacity of beams of solid section. 1. Introduction The use of timber, as well as timber elements and structures, in construction is a relevant direction of contemporary research (Shams Huq et al. (2025); Gomon et al. (2023); Zakic (1974); Pavluk et al. (2024); Patton-Mallory and Cramer (1987); Sobczak Piastka et al. (2023)). As a natural material, timber combines sufficient strength, low weight, and ease of processing (Homon et al. (2024); Gong et al. (2019); Datsiuk et al. (2024); Horbachova et al. (2023); Aleksiievets et al. (2024)). Owing to advances in timber processing and protection technologies, the possibilities for its application have significantly expanded (Homon et al. (2024); Moya and Bano (2017); Sinha et al. (2012); Heitner et al. (2010); Gomon et al. (2022)). Timber elements and structures contribute to reducing material consumption and energy demand during the construction of buildings and structures (Ivaniuk et al. (2025); Pavluk et al. (2025); Gomon et al. (2024)). An important advantage of timber is its environmental friendliness and renewability, which aligns with the principles of sustainable development. At the same time, the efficient use of timber requires a thorough investigation of its physical and mechanical properties (Homon et al. (2025)). Particular attention should be paid to the influence of material moisture content on its behavior under load (Huang et al. (2006); Matviiuk et al. (2025); Fojtik (2019); Homon et al. (2023); Crossman et al. (2024); Janiak et al. (2023)). Since timber-based materials, elements, and structures are exposed to freshwater (Gerhards (1982); Roshchuk et al. (2024); Thygesen et al. (2010); Evans and Banks (1988)) and marine (Cragg (1996); Stamm (1934); Kirker et al. (2020); Roman et al. (2023); Johnson et al. (1992); Klüppel and Mai ( 2018)) environments, particularly when used as load-bearing components of structures (bridges, bridge crossings, bank-protection structures, marine piers). The

* Corresponding author. Tel.: +38-067-915-86-50; fax: +0-000-000-0000 . E-mail address: slavagomon@ukr.net

2452-3216 © 2026 The Authors. Copy from the contract: 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 DMDP 2025 organizers 10.1016/j.prostr.2026.03.085