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The study aims to evaluate how different interface treatments between two concretes affect the shear strength of composite beams.

March 3, 2026Open Access

Experimental study of concrete composite beams subjected to shear

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The study aims to evaluate how different interface treatments between two concretes affect the shear strength of composite beams.
Tested four reinforced concrete composite beams under two point loads.
Applied various treatments at the interface: smooth surface, rough surface, and additional shear connectors.
Maintained fixed parameters like length, geometry, and reinforcement ratios of the beams.
Three beams were expected to fail due to horizontal shear but failed instead due to vertical shear.
Shear strength was influenced by the interface treatment between the two types of concrete cast at different times.
The actual strengths were lower than those predicted by design codes.

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Experimental study analyzes shear strength in composite beams, indicating interface treatment impacts performance.

García et al. (2018) studied this question.

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