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This study investigated the axial compression capacity of steel reinforced concrete (SRC) stub columns with unsymmetrical steel sections (USSs). Axial compression tests were conducted on four SRC stub columns with USSs, and internal force analyses were conducted on a total of 22 finite element models. The failure modes, load-displacement curves, and internal forces were used to analyze the mechanical behavior and bearing capacity of the columns under axial compression. Furthermore, the variables that influence the axial compression capacity comprising different width-to-thickness ratios of the steel flange, area ratio of the steel section to the confined concrete, web eccentricities, and steel eccentricities were investigated in a parametric analysis. The results showed that compared to SRC stub columns with symmetrical steel sections (SSSs), the columns with USSs showed slightly flexural failure. Steel eccentricity was the main factor that affected the axial compression capacity of SRC stub columns with USSs. An equation was proposed for calculating axial compression capacity of an SRC stub column with a USS considering steel eccentricity. The results calculated by the proposed formula showed better agreement with the experimental value than that calculated by the codes, and the formula is applicable to SRC stub columns with SSSs as well.
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PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS
ISSN: 0965-0911
Year: 2024
Issue: 1
Volume: 178
Page: 3-14
1 . 2 0 0
JCR@2023
CAS Journal Grade:4
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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