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Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete

Journal Article


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Abstract


  • Circular concrete-filled double steel tubular (CFDST) columns in high-rise building structures possess high

    ductility and strength performance owing to the concrete confinement exerted by the external and internal

    circular steel tubes. However, the behavior of circular CFDST short columns that are loaded eccentrically has not

    been investigated either experimentally or numerically. Particularly, numerical studies on the moment-curvature

    responses, strength envelopes, confinement effects and moment distributions in circular CFDST beam-columns

    have not been reported. In this paper, experimental and computational investigations into the structural responses

    of circular CFDST short columns loaded eccentrically are presented. Nineteen short circular CFDST

    columns with various parameters under axial and eccentric loads were tested to failure to measure their

    structural responses. Test results are presented and discussed. A mathematical simulation model underlying the

    method of fiber analysis is proposed that simulates the axial load-moment-curvature relationships as well as the

    strength interaction curves of CFDST beam-columns composed of circular sections. The mathematical modeling

    technique explicitly takes into account the confinement of concrete on the responses of CFDST columns. The

    computational procedure and solution method are given. The accuracy of the computer simulation model is

    evaluated by comparing computations against experimental data. The significance of material and geometric

    properties, concrete confinement and axial load ratio on the responses of moment-curvature and strength envelopes

    of CFDST columns and the moment distributions in concrete and steel components are investigated. The

    mathematical model proposed not only simulates well the experimentally observed responses of CFDST columns

    but also can monitor the moment distributions in the steel and concrete components of such composite columns.

UOW Authors


  •   Ahmed, Mizen (external author)
  •   Liang, Qing Quan (external author)
  •   Patel, Vipulkumar I. (external author)
  •   Hadi, Muhammad

Publication Date


  • 2019

Citation


  • Ahmed, M., Liang, Q. Quan., Patel, V. Ishvarbhai. & Hadi, M. N. S. (2019). Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete. Engineering Structures, 201 109790-1-109790-16.

Scopus Eid


  • 2-s2.0-85073233613

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4339&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3317

Start Page


  • 109790-1

End Page


  • 109790-16

Volume


  • 201

Place Of Publication


  • United Kingdom

Abstract


  • Circular concrete-filled double steel tubular (CFDST) columns in high-rise building structures possess high

    ductility and strength performance owing to the concrete confinement exerted by the external and internal

    circular steel tubes. However, the behavior of circular CFDST short columns that are loaded eccentrically has not

    been investigated either experimentally or numerically. Particularly, numerical studies on the moment-curvature

    responses, strength envelopes, confinement effects and moment distributions in circular CFDST beam-columns

    have not been reported. In this paper, experimental and computational investigations into the structural responses

    of circular CFDST short columns loaded eccentrically are presented. Nineteen short circular CFDST

    columns with various parameters under axial and eccentric loads were tested to failure to measure their

    structural responses. Test results are presented and discussed. A mathematical simulation model underlying the

    method of fiber analysis is proposed that simulates the axial load-moment-curvature relationships as well as the

    strength interaction curves of CFDST beam-columns composed of circular sections. The mathematical modeling

    technique explicitly takes into account the confinement of concrete on the responses of CFDST columns. The

    computational procedure and solution method are given. The accuracy of the computer simulation model is

    evaluated by comparing computations against experimental data. The significance of material and geometric

    properties, concrete confinement and axial load ratio on the responses of moment-curvature and strength envelopes

    of CFDST columns and the moment distributions in concrete and steel components are investigated. The

    mathematical model proposed not only simulates well the experimentally observed responses of CFDST columns

    but also can monitor the moment distributions in the steel and concrete components of such composite columns.

UOW Authors


  •   Ahmed, Mizen (external author)
  •   Liang, Qing Quan (external author)
  •   Patel, Vipulkumar I. (external author)
  •   Hadi, Muhammad

Publication Date


  • 2019

Citation


  • Ahmed, M., Liang, Q. Quan., Patel, V. Ishvarbhai. & Hadi, M. N. S. (2019). Behavior of eccentrically loaded double circular steel tubular short columns filled with concrete. Engineering Structures, 201 109790-1-109790-16.

Scopus Eid


  • 2-s2.0-85073233613

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4339&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3317

Start Page


  • 109790-1

End Page


  • 109790-16

Volume


  • 201

Place Of Publication


  • United Kingdom