City Research Online

Abstract

Although the use of high-strength steel in cellular beams enhances both structural performance and sustainability, it remains largely unexplored in current literature. Residual stresses and geometric imperfections, inherent to the manufacturing process, significantly influence the global stability of steel cellular beams. However, to date, no studies have investigated residual stresses in high-strength steel cellular beams. This paper presents a sensitivity analysis of the effects of residual stresses and geometric imperfections on the structural behavior of high-strength steel cellular beams. The first stage of the research involved validating numerical models developed in ABAQUS against experimental tests on high-strength steel solid-webbed beams and common steel cellular beams. An initial parametric study was conducted to assess the influence of six different residual stress models and two amplitudes of initial geometric imperfections on the stability of common steel cellular beams and high-strength steel solid-webbed beams. Subsequently, a sensitivity analysis was performed to evaluate the effect of high-strength steels on behavior of cellular beams. The study examined the impact of geometric and material imperfections on finite element models subjected to lateral-torsional buckling. The results indicated that residual stresses have a lesser impact on the buckling resistance of high-strength steel cellular beams. Conversely, larger initial geometric imperfections tend to produce conservative results, leading to lower ultimate load capacities. Furthermore, a residual stress model accounting for the manufacturing process of common steel cellular beams can be effectively used to describe the residual stresses in high-strength steel cellular beams.

Publication Type:	Article
Additional Information:	© 2025. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords:	High-strength steel; Cellular beam; Residual stress; Initial geometric imperfection; Lateral-torsional buckling; Finite element analysis.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
Departments:	School of Science & Technology School of Science & Technology > Department of Engineering
SWORD Depositor:	Symplectic Administrator

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