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A unified formula for calculating bending capacity of solid and hollow concrete-filled steel tubes under normal and elevated temperature

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<mark>Journal publication date</mark>02/2018
<mark>Journal</mark>Journal of Constructional Steel Research
Volume141
Number of pages10
Pages (from-to)216-225
<mark>State</mark>Published
Early online date5/12/17
<mark>Original language</mark>English

Abstract

Bending is one of the most common forms of deformation that may cause failure of a structural member, such as a column, especially when the member is exposed to fire. Fire resistance design is therefore an important factor that must be considered in the design process of modern building structures. Based on the authors' previous work on the unified formulation of axially loaded CFST hollow and solid columns with circular and polygonal sections, a unified formula for calculating the ultimate bending moment of solid and hollow CFST columns at room temperature is proposed first in this paper. The formula is then extended to include elevated temperature using the average temperature method. Finally, a unified formula for both room and elevated temperature are presented. Validations are carried out through comparisons with the results from experimental tests and finite element simulations.

Bibliographic note

This is the author’s version of a work that was accepted for publication in
Journal of Constructional Steel Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Constructional Steel Research, 141, 2018 DOI: 10.1016/j.jcsr.2017.11.017