Skip to main content
placeholder image

Fiber element simulation of interaction behavior of local and global buckling in axially loaded rectangular concrete-filled steel tubular slender columns under fire exposure

Journal Article


Download full-text (Open Access)

Abstract


  • Slender rectangular thin-walled concrete-filled steel tubular (CFST) columns in composite building structures

    exposed to fire may experience the interaction of local and global buckling. Numerical investigations on the

    interaction buckling responses of such columns under fire exposure have been rarely reported. This paper describes

    a fiber-based computational model for the prediction of the fire-resistance and interaction responses of

    local and global buckling of concentrically-loaded slender CFST columns made of rectangular sections exposed to

    fire. The thermal analysis is undertaken to calculate the distribution of temperatures in the column cross-section

    considering the effects of the air gap between concrete and steel, exposure surface emissivity as well as moisture

    content in concrete. The local and post-local buckling models proposed previously for steel tube walls at elevated

    temperatures are incorporated in the inelastic analysis of cross-sections to model the progressive post-local

    buckling. The global buckling analysis of slender CFST columns exposed to fire accounts for the effects of material

    and geometric nonlinearities as well as local buckling. Efficient computational procedure and solution

    algorithms are developed to solve the nonlinear equilibrium dynamic functions of loaded slender CFST columns

    exposed to fire. Independent experimental and numerical results on slender CFST columns are utilized to validate

    the computational model. The interaction behavior of local and global buckling and fire-resistance of

    slender rectangular CFST columns are investigated. It is shown that the developed computational model provides

    a reasonably accurate and efficient method for the prediction of the interaction buckling responses as well as the

    fire-resistance of slender CFST columns subjected to axial loading and fire.

UOW Authors


  •   Kamil, Ghanim Mohammed (external author)
  •   Liang, Qing Quan (external author)
  •   Hadi, Muhammad

Publication Date


  • 2019

Citation


  • Kamil, G. Mohammed., Liang, Q. Quan. & Hadi, M. N. S. (2019). Fiber element simulation of interaction behavior of local and global buckling in axially loaded rectangular concrete-filled steel tubular slender columns under fire exposure. Thin-Walled Structures, 145 106403-1-106403-15.

Scopus Eid


  • 2-s2.0-85072283763

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4177&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3158

Start Page


  • 106403-1

End Page


  • 106403-15

Volume


  • 145

Place Of Publication


  • United Kingdom

Abstract


  • Slender rectangular thin-walled concrete-filled steel tubular (CFST) columns in composite building structures

    exposed to fire may experience the interaction of local and global buckling. Numerical investigations on the

    interaction buckling responses of such columns under fire exposure have been rarely reported. This paper describes

    a fiber-based computational model for the prediction of the fire-resistance and interaction responses of

    local and global buckling of concentrically-loaded slender CFST columns made of rectangular sections exposed to

    fire. The thermal analysis is undertaken to calculate the distribution of temperatures in the column cross-section

    considering the effects of the air gap between concrete and steel, exposure surface emissivity as well as moisture

    content in concrete. The local and post-local buckling models proposed previously for steel tube walls at elevated

    temperatures are incorporated in the inelastic analysis of cross-sections to model the progressive post-local

    buckling. The global buckling analysis of slender CFST columns exposed to fire accounts for the effects of material

    and geometric nonlinearities as well as local buckling. Efficient computational procedure and solution

    algorithms are developed to solve the nonlinear equilibrium dynamic functions of loaded slender CFST columns

    exposed to fire. Independent experimental and numerical results on slender CFST columns are utilized to validate

    the computational model. The interaction behavior of local and global buckling and fire-resistance of

    slender rectangular CFST columns are investigated. It is shown that the developed computational model provides

    a reasonably accurate and efficient method for the prediction of the interaction buckling responses as well as the

    fire-resistance of slender CFST columns subjected to axial loading and fire.

UOW Authors


  •   Kamil, Ghanim Mohammed (external author)
  •   Liang, Qing Quan (external author)
  •   Hadi, Muhammad

Publication Date


  • 2019

Citation


  • Kamil, G. Mohammed., Liang, Q. Quan. & Hadi, M. N. S. (2019). Fiber element simulation of interaction behavior of local and global buckling in axially loaded rectangular concrete-filled steel tubular slender columns under fire exposure. Thin-Walled Structures, 145 106403-1-106403-15.

Scopus Eid


  • 2-s2.0-85072283763

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4177&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3158

Start Page


  • 106403-1

End Page


  • 106403-15

Volume


  • 145

Place Of Publication


  • United Kingdom