2026-05-05T23:03:49Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/786162025-10-14T19:00:59Zcom_10324_1167com_10324_931com_10324_894col_10324_1238

Structural behaviour of demountable tubular column-to-base plate joints with welded studs García García, Ismael López-Colina Pérez, Carlos Serrano López, Miguel Ángel López Gayarre, Fernando Lorenzana Ibán, Antolín Demountable joints play a key role in enabling structural reuse and sustainable construction. By reducing ma- terial waste and facilitating future adaptability, they contribute to more resource-efficient building lifecycles. This study presents a novel demountable column-to-base plate joint for tubular steel structures, designed to enable disassembly and structural reuse in alignment with circular economy principles. The proposed connec- tion, composed of four angle cleats and welded studs, is evaluated through full-scale testing and validated finite element modelling. A validated numerical model was first developed using data from eight experimentally tested joints, achieving good agreement with measured rotational stiffness, with a mean absolute percentage error of 1.87 %. This model was then used to simulate an extended set of 23 configurations to investigate the influence of geometric parameters. Results reveal that wall thickness exerts a structural effect beyond its contribution to the moment of inertia, which may be attributed to local deformation mechanisms or elastic instabilities influencing joint stiffness in slender tubular profiles. When stiffness values are properly scaled, they collapse onto a single trend governed by the slenderness ratio, enabling the derivation of a generalized stiffness decay law for geometrically similar tubular joints. A refined component-based analytical model was also developed, capturing the observed trends and providing conservative estimates with acceptable accuracy. Compared to Eurocode formulations, which exhibit limited predictive capability for this joint typology, the proposed models offer a reliable and practical design tool for demountable tubular steel connections 2025-10-14T11:25:32Z 2025-10-14T11:25:32Z 2025-10-14T11:25:32Z 2025 info:eu-repo/semantics/article Journal of Constructional Steel Research, 2025, vol. 235, p. 109867 0143-974X https://uvadoc.uva.es/handle/10324/78616 10.1016/j.jcsr.2025.109867 109867 Journal of Constructional Steel Research 235 eng https://www.sciencedirect.com/science/article/pii/S0143974X25005450 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2025 The Author(s) Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier