Techno Press

Steel and Composite Structures   Volume 24, Number 3, June30 2017, pages 309-322
Composite action of notched circular CFT stub columns under axial compression
Fa-xing Ding, Bing Wen, Xue-mei Liu and Hai-bo Wang

Abstract     [Full Text]
    This paper conducted both numerical and theoretical studies to investigate the composite action of notched circular concrete-filled steel tubular (CFT) stub columns under axial compression and established a theoretical method to predict their ultimate bearing capacity. 3D finite element (FE) analysis was conducted to simulate the composite action and the results were in good agreement with experimental results on circular CFT stub columns with differently oriented notches in steel tubes. Parametric study was conducted to understand the effects of different parameters on the mechanical behavior of circular CFT stub columns and also the composite action between the steel tube and the core concrete. Based on the results, a theoretical formula was proposed to calculate the ultimate bearing capacity of notched CFT stub columns under compression with consideration of the composite action between the steel tube and the core concrete.
Key Words
    circular concrete-filled steel tubular columns; notch; finite element analysis; ultimate bearing capacity; composite action
(1) Fa-xing Ding, Bing Wen, Hai-bo Wang:
School of Civil Engineering, Central South University, Changsha, Hunan Province, 410075, P.R. China;
(2) Xue-mei Liu:
School of Civil Engineering and Built Environment, Queensland University of Technology, Brisbane, QLD 4001, Australia.

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