Journal
THIN-WALLED STRUCTURES
Volume 98, Issue -, Pages 443-453Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.tws.2015.10.018
Keywords
Stirrup confinement; Square concrete-filled steel tubular stub column; Experimental study; Confinement effect; Ultimate load-bearing capacity; Ductility
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Funding
- National Key Technology RD Program [2011BAJ09B02]
- Program for the National Natural Science Foundation of China [51578548]
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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. (C) 2015 Published by Elsevier Ltd.
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