Comparative study of square stirrup-confined concrete-filled steel tubular stub columns under axial loading

Fa-xing Ding, De-ren Lu, Y. Bai, Qi-shi Zhou, Ming Ni, Zhi-wu Yu, Guo-shuai Jiang

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44 Citations (Scopus)

Abstract

This paper presents a comparative study and a 3D finite element (FE) model of square stirrup-confined concrete-filled steel tubular (stirrup-confined CFT) stub columns. The FE results agreed well with the experimental results. The results indicated that: (1) The ultimate load-bearing capacity of CFT stub columns with internal studs was no improvement; (2) All three forms of stirrup confinement effectively reduced local bucking of the steel tube, and the cross ties was optimal, followed by spiral stirrups; (3) With the same overall steel ratio, the behavior of the square stirrup-confined CFT stub columns was considerably higher than in the square CFT stub columns.
Original languageEnglish
Pages (from-to)443-453
Number of pages11
JournalThin-Walled Structures
Volume98
DOIs
Publication statusPublished - 2016

Keywords

  • Stirrup confinement
  • Square concrete-filled steel tubular stub
  • column
  • Experimental study
  • Confinement effect
  • Ultimate load-bearing capacity
  • Ductility

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