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Computational simulation of eccentrically loaded circular thin-walled concrete-filled double steel tubular slender columns

Journal Article


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Abstract


  • The concrete confinement provided by the circular steel tubes improves the performance of circular concretefilled double steel tubular (CFDST) columns, which have increasingly been employed as high-performance

    structural members in tall buildings. This paper presents computational and design models for the simulation

    and design of high strength CFDST slender columns composed of circular thin-walled sections that are eccentrically loaded. The formulation of the computational model is described, which takes into account the influences of concrete confinement, geometric imperfection, second-order, gradual plasticity of steel, and geometric

    and material nonlinearities. The inverse quadratic method is implemented in computational algorithms which

    solve the highly nonlinear equilibrium function of slender CFDST circular columns. The computations are

    compared with experimentally measured results to validate the mathematical modeling procedure developed.

    The behavior of slender circular CFDST columns made of high-strength concrete is investigated by utilizing the

    developed computational model taking into consideration the important material and geometric parameters.

    Proposed are design models that determine the ultimate loads of CFDST slender columns loaded concentrically

    and the axial load-moment strength interaction curves of slender thin-walled CFDST columns under eccentric

    loads. It is shown that the computational simulation method proposed can efficiently and accurately capture the

    experimentally measured behavior of CFDST slender columns. The design models give good strength predictions

    of CFDST columns and can be employed in designing CFDST composite columns.

UOW Authors


  •   Ahmed, Mizan (external author)
  •   Liang, Qing (external author)
  •   Patel, Vipulkumar (external author)
  •   Hadi, Muhammad

Publication Date


  • 2020

Citation


  • Ahmed, M., Liang, Q., Patel, V. & Hadi, M. N. S. (2020). Computational simulation of eccentrically loaded circular thin-walled concrete-filled double steel tubular slender columns. Engineering Structures, 213 110571-1-110571-18.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4917&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3890

Start Page


  • 110571-1

End Page


  • 110571-18

Volume


  • 213

Place Of Publication


  • United Kingdom

Abstract


  • The concrete confinement provided by the circular steel tubes improves the performance of circular concretefilled double steel tubular (CFDST) columns, which have increasingly been employed as high-performance

    structural members in tall buildings. This paper presents computational and design models for the simulation

    and design of high strength CFDST slender columns composed of circular thin-walled sections that are eccentrically loaded. The formulation of the computational model is described, which takes into account the influences of concrete confinement, geometric imperfection, second-order, gradual plasticity of steel, and geometric

    and material nonlinearities. The inverse quadratic method is implemented in computational algorithms which

    solve the highly nonlinear equilibrium function of slender CFDST circular columns. The computations are

    compared with experimentally measured results to validate the mathematical modeling procedure developed.

    The behavior of slender circular CFDST columns made of high-strength concrete is investigated by utilizing the

    developed computational model taking into consideration the important material and geometric parameters.

    Proposed are design models that determine the ultimate loads of CFDST slender columns loaded concentrically

    and the axial load-moment strength interaction curves of slender thin-walled CFDST columns under eccentric

    loads. It is shown that the computational simulation method proposed can efficiently and accurately capture the

    experimentally measured behavior of CFDST slender columns. The design models give good strength predictions

    of CFDST columns and can be employed in designing CFDST composite columns.

UOW Authors


  •   Ahmed, Mizan (external author)
  •   Liang, Qing (external author)
  •   Patel, Vipulkumar (external author)
  •   Hadi, Muhammad

Publication Date


  • 2020

Citation


  • Ahmed, M., Liang, Q., Patel, V. & Hadi, M. N. S. (2020). Computational simulation of eccentrically loaded circular thin-walled concrete-filled double steel tubular slender columns. Engineering Structures, 213 110571-1-110571-18.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4917&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/3890

Start Page


  • 110571-1

End Page


  • 110571-18

Volume


  • 213

Place Of Publication


  • United Kingdom