Numerical Study of Bearing Strength of Infilled Concrete in Large Diameter CFST Column Reinforced by Shear Stoppers

Ensuring an adequate bond between the steel tube and infilled concrete interface plays an essential role in achieving composite action for concrete-filled steel tubular (CFST) columns. Thus, this study proposes a new type of large diameter CFST column where the steel tube is reinforced by shear stop...

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Bibliographic Details
Published in:Designs 2024-01, Vol.8 (1), p.9
Main Authors: Pham, My, Dinh, Ngoc-Hieu, Dang, Cong-Thuat, Truong, Hoai-Chinh
Format: Article
Language:English
Subjects:
Bearing strength
Carbon steel
CFST column
Compressive strength
Concrete
Concrete columns
Concrete properties
Connectors
Construction
Diameters
Dynamic testing
Finite element method
infilled concrete
Methods
Reinforcing steels
Shear
shear stopper
shear stud
slip
Stainless steel
Steel tubes
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Summary:Ensuring an adequate bond between the steel tube and infilled concrete interface plays an essential role in achieving composite action for concrete-filled steel tubular (CFST) columns. Thus, this study proposes a new type of large diameter CFST column where the steel tube is reinforced by shear stoppers. The bearing strength of the infilled concrete is the decisive factor in evaluating the overall working efficiency between infilled concrete and steel tube. In this paper, we use nonlinear finite element analysis (NFEA) to investigate the bearing strength of the infilled concrete concerning the ratio of the steel tube’s diameter to its thickness (D/t), the number of shear stoppers N, the height of the shear stopper hb, and the concrete compressive strength (CCS) fc′. Our results show that the influencing factors on the bearing strength of the infilled concrete were arranged in descending order as follows: the number of shear stoppers, the height of shear stopper, the CCS, and the D/t ratio. We also analyze and highlight some significant parameters related to the bearing strength of infilled concrete.
ISSN:2411-9660
2411-9660
DOI:10.3390/designs8010009