Testing, simulation and design of built-up cold-formed steel-lightweight concrete (CFS-LWC) composite beams subjected to elevated temperatures
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Cold-formed steel (CFS) products are lightweight, structurally efficient and highly versatile, making them suitable for a wide range of construction applications. Although studies have been performed to analyse the flexural behaviour of CFS composite beams at room temperature, their performance at elevated temperatures has yet to be investigated; this is, therefore, the focus of the present study. Through experiments, the structural fire performance of innovative built-up CFS-lightweight concrete (LWC) composite beams is examined. Two full-scale fire tests on simply-supported CFS-LWC composite beams are presented. The test setup, test procedure and obtained results, including the temperature evolution, fire resistance time and failure modes, are described. A numerical modelling study is also presented through which additional insights into the observed structural behaviour are gained. Comparisons between the experimental results and those determined according to EN 1994–1–2 design provision are presented. The results showed that, despite the studied CFS-LWC composite sections being beyond the scope of the code, good predictions of fire resistance were obtained.
Date Issued
2025-08-01
Date Acceptance
2025-03-19
Citation
Thin Walled Structures, 2025, 213
ISSN
0263-8231
Publisher
Elsevier
Journal / Book Title
Thin Walled Structures
Volume
213
Copyright Statement
© 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Identifier
10.1016/j.tws.2025.113212
Publication Status
Published
Article Number
113212
Date Publish Online
2025-03-24