Parametric Study of Concrete Filled Fabricated Steel Box Composite Column

DOI

10.2991/978-94-6463-672-7_20How to use a DOI?

Keywords

Ultimate strength; Steel box section; B/t ratio; L/B ratio; Parametric study

Abstract

Concrete-filled fabricated steel box composite columns, particularly concrete-filled box sections, are crucial in modern structural engineering due to their high load-carrying capacity, stiffness, and ductility. However, full-scale testing of composite columns is often impractical due to high costs and lack of test facilities, making computer-aided modeling an essential alternative. While extensive research has been conducted on composite columns, a comprehensive understanding of how multiple design parameters such as the B/t ratio, L/B ratio, and material strengths, together affect axial load-bearing capacity and overall buckling behavior. Moreover, limited studies exist comparing different international design codes’ predictions of composite column behavior. This study addresses these gaps by conducting parametric analyses to evaluate the impact of plate thickness (B/t), high-to-width ratio (L/B), concrete and steel strength on load-bearing capacity and stability of composite columns. The geometry of the parametric columns was square, with sizes ranging from 300mm to 600mm, commonly used in civil engineering structures. Steel strength values of 250MPa, 345MPa, 415MPa, and 500MPa, and concrete strengths of 21MPa, 28MPa, 35MPa, and 41MPa were considered. The modulus of elasticity of steel was consider 200GPa and poison’s ratio taken 0.3. Concrete modulus of elasticity was calculating from the relation of 4700√f’c and poison’s ratio taken 0.2. The effects of B/t ratio were examined by changing the steel plate thickness, while L/B ratios were studied by altering column lengths from 3m to 6m. Finite element analysis using ANSYS Workbench was conducted to numerically verify analytical strength values derived from ACI, AISC, and EC4 design codes. A displacement-based axial compressive load was applied to evaluate the ultimate strength, ductile behavior, and failure modes of the columns. Results indicated that increasing steel and concrete strength, as well as plate thickness, significantly enhances axial capacity, while increasing L/B ratios reduced buckling capacity. The AISC code was found to be more conservative than other design codes. These findings contribute to the development of stronger, more efficient composite column designs for various engineering applications.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - A. K. M. Ruhul Amin
AU  - Md. Khasro Miah
AU  - Md. Mozammel Hoque
PY  - 2025
DA  - 2025/04/04
TI  - Parametric Study of Concrete Filled Fabricated Steel Box Composite Column
BT  - Proceedings of the 1st International Conference on Recent Innovation in Civil Engineering and Architecture for Sustainable Development (IICASD-2024)
PB  - Atlantis Press
SP  - 245
EP  - 259
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-672-7_20
DO  - 10.2991/978-94-6463-672-7_20
ID  - Amin2025
ER  -