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Compressive behavior of CFDST columns with external S22053 duplex stainless steel tubes: Experimental and numerical investigation
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DOI：10.1016/j.jcsr.2026.110522.png)
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Abstract
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• Tested were 16 CFDST columns with external duplex stainless steel tubes under compressive loading. • Examined the effects of the hollow ratio and slenderness ratio on ultimate capacity. • Performed FE and parametric studies on CFDST columns with external duplex stainless steel tubes. • Proposed a new formula for predicting the ultimate axial capacity. • Built a dataset of 1862 samples and developed an XGBoost ultimate capacity predictor.
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