DOI QR코드

DOI QR Code

Inelastic analysis for the post-collapse behavior of concrete encased steel composite columns under axial compression

Ky, V.S.;Tangaramvong, S.;Thepchatri, T.

  • 투고 : 2015.01.26
  • 심사 : 2015.05.04
  • 발행 : 2015.11.25

초록

This paper proposes a simple inelastic analysis approach to efficiently map out the complete nonlinear post-collapse (strain-softening) response and the maximum load capacity of axially loaded concrete encased steel composite columns (stub and slender). The scheme simultaneously incorporates the influences of difficult instabilizing phenomena such as concrete confinement, initial geometric imperfection, geometric nonlinearity, buckling of reinforcement bars and local buckling of structural steel, on the overall behavior of the composite columns. The proposed numerical method adopts fiber element discretization and an iterative M${\ddot{u}}$ller's algorithm with an additional adaptive technique that robustly yields solution convergence. The accuracy of the proposed analysis scheme is validated through comparisons with various available experimental benchmarks. Finally, a parametric study of various key parameters on the overall behaviors of the composite columns is conducted.

키워드

composite column;concrete confinement;concrete encased steel;geometry nonlinearity;inelastic analysis;post-buckling;strain-softening

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피인용 문헌

  1. Nonlinear analysis of biaxially loaded rectangular concrete-filled stainless steel tubular slender beam-columns vol.140, 2017, https://doi.org/10.12989/scs.2015.19.5.1237
  2. Stress-transfer in concrete encased and filled tube square columns employed in top-down construction vol.22, pp.1, 2016, https://doi.org/10.12989/scs.2015.19.5.1237