Nonlinear analysis and behavior of concrete-filled steel tubular beam-columns

Paper

Liang, Q. Q. and Hadi, M. N. S.. 2008. "Nonlinear analysis and behavior of concrete-filled steel tubular beam-columns." Xie, Yi Min and Patnaikuni, Indubhushan (ed.) ISEC 4: Innovations in Structural Engineering and Construction. Melbourne, Australia 26 - 28 Sep 2007 London, United Kingdom.
Paper/Presentation Title

Nonlinear analysis and behavior of concrete-filled steel tubular beam-columns

Presentation TypePaper
AuthorsLiang, Q. Q. (Author) and Hadi, M. N. S. (Author)
EditorsXie, Yi Min and Patnaikuni, Indubhushan
Journal or Proceedings TitleProceedings of the 4th International Structural Engineering and Construction Conference (ISEC 4)
Journal Citation1, pp. 777-782
Number of Pages6
Year2008
Place of PublicationLondon, United Kingdom
ISBN9780415457552
Web Address (URL) of Paperhttp://materialsaustralia.com.au/ISEC-4/Default.htm
Conference/EventISEC 4: Innovations in Structural Engineering and Construction
Event Details
ISEC 4: Innovations in Structural Engineering and Construction
Event Date
26 to end of 28 Sep 2007
Event Location
Melbourne, Australia
Abstract

This paper presents a nonlinear fiber element analysis method for predicting the behavior of short concrete-filled steel tubular (CFST) beam-columns under axial load and biaxial bending. Nonlinear constitutive models for confined concrete and structural steel are considered in the fiber element analysis. Efficient secant algorithms are developed to iterate the depth and orientation of the neutral axis within a composite section to satisfy equilibrium conditions. The accuracy of the fiber element method is established by comparisons with existing solutions. The fiber element analysis program developed is employed to study the effects of steel ratios and concrete strengths on axial load-bending moment interaction curves for CFST beam-columns. The proposed fiber element analysis technique is shown to be efficient and can be used directly in the design of CFST beam-columns.

Keywordsbeam-columns; biaxial bending; concrete-filled steel tubular columns; composite columns; fiber element analysis; nonlinear analysis; strength
ANZSRC Field of Research 2020401699. Materials engineering not elsewhere classified
400505. Construction materials
400510. Structural engineering
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Byline AffiliationsDepartment of Agricultural, Civil and Environmental Engineering
University of Wollongong
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