PSI - Issue 81

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 81 (2026) 539–546

© 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 review under responsibility of DMDP 2025 organizers Keywords: Perforated steel beams; Stress-strain state; Finite element method; Double-pitched beams; Arched beams; Haunch. 1. Introduction In large-span single-story buildings, the primary load-bearing elements of the roof are beams. These structural elements typically carry loads from self-weight, roof weight, and snow cover. Additional loads may include the weight of engineering utilities, sanitary and technological equipment (such as ventilation systems or solar panels), and less commonly, the operation of light suspended cranes. Since the loads on roof beams are significantly lower than those on floor beams, this makes it possible to construct large-span spaces without additional columns or supports. Currently, one of the most popular methods for covering buildings with spans of 24 meters or more is the use of metal trusses. Such structures are fabricated from rolled profiles, most often cold-formed welded square or circular hollow tubes, and less frequently from angles, channels, or I-sections. The advantages of metal trusses include relatively simple design, which does not require complex specialized software, and high strength and stiffness characteristics relative to their weight. However, the disadvantages of these structures are the high labor intensity during fabrication and their considerable height, which reduces the usable volume of the building. Abstract The paper presents the results of numerical modeling of steel perforated beams with horizontal arrangement, double-pitched, and arched configuration with a span of 24 m, using the finite element method (FEM) implemented in the ANSYS software environment. The stress-strain state of the beams was analyzed for configurations both without and with stiffening gussets (haunches) located in the eaves and apex joints. Quantitative evaluations of deflections, equivalent (von Mises) stresses in the beam flanges, and stress around perforation openings were obtained. It was established that double-pitched and arched beams exhibit smaller deflections and a more uniform stress distribution compared to horizontal beams. The study demonstrates that the incorporation of haunches reduces the maximum deflections by up to 35% and local stresses around perforations by up to 80%. VIII International Conference “In - service Damage of Materials: Diagnostics and Prediction“ (DMDP 2025) Investigation of the Stress-Strain State of Double-Pitched and Arched Perforated Beams Mykola Pidgurskyi a , Ivan Pidgurskyi a, *, Denys Bykiv a , Nazarii Bykiv a , Igor Okipnyi a , Andriy Mushak b a Ternopil Ivan Puluj National Technical University, 56 Ruska St., Ternopil 46001, Ukraine b West Ukrainian National University, 11 Lvivska St., Ternopil 46009, Ukraine

* Corresponding author. Tel.: +38(066) 837 27 31. E-mail address: ipidhurskyy@gmail.com

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.2026.03.092