 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13653 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8223
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| In English (Mech. Solids): | | 5430 |
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| Wenhui Liu, Laifu Zhang, Yangzhi Zhao, Yuxiang Shen, and Yong Cai, "Advances in Mechanical Behaviour of Cold-Formed Thin-Walled Steel Built-Up Sections," Mech. Solids. 60 (8), 6994-7013 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
8 |
Pages |
6994-7013 |
| DOI |
10.1134/S0025654425606287 |
| Title |
Advances in Mechanical Behaviour of Cold-Formed Thin-Walled Steel Built-Up Sections |
| Author(s) |
Wenhui Liu (School of Civil Engineering, Central South University, Changsha, 410075 China)
Laifu Zhang (School of Civil Engineering, Central South University, Changsha, 410075 China, zlf2926457836@163.com)
Yangzhi Zhao (School of Civil Engineering, Central South University, Changsha, 410075 China)
Yuxiang Shen (School of Civil Engineering, Central South University, Changsha, 410075 China)
Yong Cai (School of Civil Engineering, Central South University, Changsha, 410075 China, 18803314336@163.com) |
| Abstract |
This paper presents a comprehensive review of recent advances in the mechanical behaviour
of cold-formed thin-walled steel (CFTWS) built-up section members. Experimental, theoretical and
numerical milestones for built-up beams and columns are critically examined. The evolution is traced
from early load-capacity validation tests to the integration of the direct strength method (DSM) and
effective-width method (EWM) for coupled local-global buckling. More recently, the focus has shifted
to performance-based investigations covering high-strength steel, stainless steel, multi-material
hybrids and post-fire conditions. A closed test-theory-code loop has thereby been established. Synthesis shows that the built-up effect markedly increases strength and stiffness; nevertheless, interface
slip, shear lag and interactive buckling must be accommodated through calibrated modification factors or curved design surfaces. Future work should develop a unified mechanical model, expand multi-failure-mode databases and create AI-driven optimisation platforms, enabling probability-based
limit-state design and transforming built-up members from empirically tuned systems into computable, optimisable, high-performance structural products. The review furnishes an engineering-ready
design roadmap for green modular and high-rise cold-formed steel (CFS) construction. |
| Keywords |
CFTWS built-up section, Mechanical behaviour, Failure mode, AI-driven optimisation |
| Received |
26 October 2025 | Revised |
23 November 2025 | Accepted |
27 November 2025 |
| Link to Fulltext |
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