Issue 75

P. Grubits et alii, Fracture and Structural Integrity, 75 (2026) 124-156; DOI: 10.3221/IGF-ESIS.75.10

Elasto-plastic truss optimization under geometric nonlinearity using a genetic algorithm

Péter Grubits Department of Structural and Geotechnical Engineering, Széchenyi István University, Gy ő r, Hungary grubits.peter@sze.hu, https://orcid.org/0009-0002-0451-0959 Pálma Porrogi Department of Theorethical Health Sciences, Széchenyi István University, Gy ő r, Hungary Centre of Translational Medicine, Semmelweis University, Hungary porrogi.palma@sze.hu, https://orcid.org/0009-0004-6554-0304 Majid Movahedi Rad Department of Structural and Geotechnical Engineering, Széchenyi István University, Gy ő r, Hungary majidmr@sze.hu, https://orcid.org/0000-0002-8393-724X

Citation: Grubits, P., Porrogi, P., Movahedi Rad, M., Elasto-plastic truss optimization under geometric nonlinearity Using a genetic algorithm, Fracture and Structural Integrity, 75 (2026) 124-156.

Received: 09.09.2025 Accepted: 06.10.2025 Published: 21.10.2025 Issue: 01.2026

Copyright: © 2026 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

K EYWORDS . Structural optimization, steel trusses, elasto-plastic analysis, geometric nonlinearity, finite element method, genetic algorithm.

I NTRODUCTION teel trusses are widely used in various structural applications owing to their numerous advantages, particularly their excellent strength-to-weight ratio and structural flexibility. The most common applications include bridges, roofs, and transmission towers, where proper design is essential to ensure safety and reliability. However, under unexpectedly excessive loads—such as extreme weather conditions [1] or seismic events [2]—trusses may experience significant stress S

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