Lateral Torsional Buckling Capacity Assessment of Cellular Steel Beams
Publication: Practice Periodical on Structural Design and Construction
Volume 28, Issue 1
Abstract
A cellular beam is a widened I-profile section with circular web openings. This type of perforated-web beam has been used immensely throughout the world during the last two decades. Lateral torsional buckling is one of the steel beam’s limit state designs. This study aims to investigate the behavior of cellular beams against lateral torsional buckling. A validated numerical model was employed in a sort of parametric study. The examined parameters are applied load configurations and the geometrical ratios of flange width-to-thickness, web height-to-thickness, openings’ spacing-to-diameter, beam’s span-to-depth, and opening’s diameter to beam-depth. Based on the results of the parametric study, a lower-bound design formula for predicting the lateral torsional buckling moment resistance of simply supported cellular beams was proposed. The suggested design formula can predict, with an acceptable degree of accuracy, the lateral torsional bending strength of simply supported cellular beams being subjected to various types of destabilizing loads.
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Data Availability Statement
All data are provided in full in the “Parametric Study” section of this paper.
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© 2022 American Society of Civil Engineers.
History
Received: May 3, 2022
Accepted: Sep 11, 2022
Published online: Nov 21, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 21, 2023
ASCE Technical Topics:
- Analysis (by type)
- Beams
- Buckling
- Continuum mechanics
- Design (by type)
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Forces (type)
- Load factors
- Mathematics
- Models (by type)
- Numerical analysis
- Numerical models
- Parameters (statistics)
- Solid mechanics
- Statistics
- Steel beams
- Structural design
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Torsion
- Web beams
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