A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression

Yu, Min and Zha, Xiaoxiong and Ye, Jianqiao and Li, Yuting (2013) A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression. Engineering Structures, 49. pp. 1-10. ISSN 0141-0296

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Current design practice of concrete-filled steel tube (CFST) columns uses different formulas for different section profiles to predict the axial load bearing capacity. It has always been a challenge and practically important issue for researchers and design engineers who want to find a unified formula that can be used in the design of the columns with various sections, including solid, hollow, circular and polygonal sections. This has been driven by modern design requirements for continuous optimization of structures in terms of not only the use of materials, but also the topology of structural components. This paper extends the authors’ previous work [1] on a unified formulation of the axial load bearing capacity for circular hollow and solid CFST columns to, now, including hollow and solid CFST columns with regular polygonal sections. This is done by taking a circular section as a special case of a polygonal one. Finally, a unified formula is proposed for calculating the axial load bearing capacity of solid and hollow CFST columns with either circular or polygonal sections. In addition, laboratory tests on hollow circular and square CFST long columns are reported. These results are useful addition to the very limited open literature on testing these columns, and are also as a part of the validation process of the proposed analytical formulas.

Item Type:
Journal Article
Journal or Publication Title:
Engineering Structures
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The final, definitive version of this article has been published in the Journal, Engineering Structures 49, 2013, © ELSEVIER.
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Deposited On:
19 Oct 2012 09:54
Last Modified:
21 Nov 2022 23:00