Vol. 20, No. 3, pp. 232-240 (2024)
STUDY ON THE ULTIMATE SHEAR PERFORMANCE OF CONCRET-
FILLED STEEL TUBULAR COMPOSITE COLUMNS
Jian-Gang Wei 1, 2, Jin-Peng Han 1, Zhi-Tao Xie 1, Yan Yang 1 and Wei Zhang 2, 3, *
1 College of Civil Engineering of Fuzhou University, No. 2, Wulongjiang Avenue, Minhou County, Fuzhou, Fujian, China.
2 School of Civil Engineer, Fujian University of Technology, No. 33, Xuefu South Road, Minhou County,
Fuzhou, Fujian, China.
3 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences Prosecká 809/76,
19000 Prague 9, Czech Republic.
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 9 July 2023; Revised:17 February 2024; Accepted: 20 February 2024
DOI:10.18057/IJASC.2024.20.3.3
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ABSTRACT
The shear performance of three concrete-filled steel tubular (CFST) composite columns was investigated via single-point shear tests, considering shear-span ratios of 0.75, 1, and 1.5. The findings indicated that the failure mode of the CFST composite column transitioned from oblique compression shear failure to localized shear failure in the joint areas as shear-span ratio decreased. An extended analysis of the parameters was carried out utilizing the ABAQUS finite element model. The analysis indicates that the ultimate shear resistance capability of steel-concrete composite columns increases with the rise in the strength of the batten concrete, the batten concrete thickness-to-span ratio, and the outer diameter of column limbs. However, it decreases with an increase in shear-span ratio. The accuracy of the calculation methods for existing similar structures was assessed, and based on the force transmission mechanism of CFST composite columns, theoretical and simplified calculation methods were proposed that meet engineering precision requirements. Consequently, this method offers a valuable theoretical reference for engineering applications.
KEYWORDS
Concrete-filled steel tube, Composite column, Shear-span ratio, Shear capability, Calculation method
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