City Research Online

Abstract

Steel beams with elliptically-based web openings have shown higher global shear resistance and increased flexural stiffness compared to those with circular web openings. However, the structural behaviour of steel-concrete composite beams with elliptically-based web openings has yet to be explored. This paper aims to investigate the web-post buckling resistance of steel-concrete composite beams with elliptically-based web openings since this failure mode has become more critical than the Vierendeel mechanism is such perforated beams. A high-fidelity finite element model was developed and a parametric study with 270 models was conducted based on key geometric parameters and various loading conditions. The influence of the geometric parameters of the elliptically-based web opening was examined, and the resistances were presented on bare steel (non-composite) perforated beams in line with previous findings. A previously developed model for predicting the web-post buckling resistance was assessed. The use of the buckling curve 'c', as specified by SCI P355 (2011), provided more effective this study showed that buckling curve ‘a’ offers better accuracy for calculating the web-post buckling resistance in composite beams with elliptically-based web openings.

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:	Composite beams; Elliptically-based web openings; Web-post buckling; Finite element analysis; Eurocode
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
Departments:	School of Science & Technology School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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