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• W4319781427 endingPage "115706" @default.
• W4319781427 startingPage "115706" @default.
• W4319781427 abstract "In this study, eight specimens with the sectional widths (B) of 200–1000 mm and the width-to-steel tube thickness ratios (B/t) of 40 and 50 were tested to failure under axial compression to investigate the size effects of square concrete-filled steel tubular (CFST) short columns, specifically those on the failure mode, composite elastic modulus, peak axial strain, peak axial stress, ductility index, strength index, and stress development. The test results indicate that the peak axial stress, ductility index, and strength index decrease with the increasing specimen size, while the failure mode and composite elastic modulus maintain relatively steady. Under the peak axial load, the longitudinal to yield stress ratio of steel tubes increases with the increasing specimen size, while the trend of transverse to yield stress ratio is opposite. The size effect on the transverse stress in the steel tube reduces the tube confinement effect, thus degrades the compressive strength of the core concrete. Compared to the test results, both the EC4 and the GB50936 codes are unconservative in predicting the strength of large square CFST columns. Therefore, a model considering the ratio of width to thickness (B/t) and specimen size is proposed to evaluate the axial bearing capacity of square CFST short columns." @default.
• W4319781427 created "2023-02-11" @default.
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• W4319781427 date "2023-04-01" @default.
• W4319781427 modified "2023-10-14" @default.
• W4319781427 title "Experimental assessment on the size effects of square concrete-filled steel tubular columns under axial compression" @default.
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• W4319781427 doi "https://doi.org/10.1016/j.engstruct.2023.115706" @default.
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