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This study aims to explore the impact of L- and U-shaped steel shear keys on the mechanical performance of 3D-printed concrete composite beams.

Mechanical Performance of 3D-Printed Concrete Composite Beams Enhanced with Shear Keys

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Randomized trial demonstrates improved load capacity in composite beams using shear keys, suggesting better structural integration.

This study aims to explore the impact of L- and U-shaped steel shear keys on the mechanical performance of 3D-printed concrete composite beams.
Introduced L- and U-shaped steel shear keys to 3D-printed concrete beams
Conducted experiments measuring ultimate load capacity, deflection, and crack width
Compared beams with and without shear keys
U-shaped shear keys increased ultimate load capacity by 8.8% (p<0.05)
Maximum deflection was reduced by 22.6%
Maximum crack width decreased by 34.4%

Ma et al. (2026) studied this question.

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