PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 1649–1656

© 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: numerical analysis, lattice structure, structural assessment, optimization Abstract This work presents the structural design, using OpenSees modeling, of a laminated wood space frame roof inspired by the wings of a seagull in flight. The geometry is based on a hyperbolic paraboloid, a double-curved ruled surface that combines structural lightness with architectural impact. Geometric analysis confirms its ruled nature, allowing construction with straight linear elements. The OpenSees model discretizes the surface into a regular nodal grid with elastic beam-column elements. Main nodes are supported by perimeter columns, and curvature is achieved by varying nodal heights. Static analysis evaluates displacements and internal forces under loads, demonstrating effective stress distribution and stability. The integration of mathematical form, structural efficiency, and natural inspiration makes this roof a remarkable example of synergy between engineering and architecture. 1. Introduction Contemporary structural design is increasingly confronted with the need to combine technical efficiency, sustainability and architectural value. In this context, lattice roofs represent a particularly interesting solution, thanks to their ability to cover large spans with lightness and formal versatility. This work focuses on the modelling and analysis of a large-scale reticular roof, inspired by the shape of a seagull's wings in flight, a symbol of elegance and XX ANIDIS Conference Geometric modelling of a lattice structure for large roofs with OpenSees Mauro Mazzei* *National Research Council, Istituto di Analisi dei Sistemi ed Informatica, LabGeoInf, Via dei Taurini, 19, I-00185, Rome, Italy

* Corresponding author. Tel.: +390649937124; fax: +0-000-000-0000 . E-mail address: mauro.mazzei@iasi.cnr.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.2025.12.210