This study aimed to investigate the static performance of notched hexagonal concrete-filled steel tube (CFST) stub columns\nthrough axial loading. Notch length, notch location, and notch direction in 14 CFST stub columns were experimentally studied.\nStress process, failure mechanism, and ultimate strength in the notched CFST columns were analyzed. Results show that notches\nin steel tubes can weaken the restraining effect of steel pipes on core concrete and induce a decrease in the ultimate strength of\nspecimens. The failure mode of components is greatly affected by notch orientation. The notch is closed under axial compression\nin the horizontally notched specimen, and the slotting indicates outward buckling in the vertically notched specimen. Based on the\ntest results, a method for calculating the ultimate strength of notched hexagonal CFST columns was established. This research\nencourages the extensive application of these structures in civil engineering.
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