What question did this study set out to answer?

The aim is to evaluate how the location and number of circular web openings in steel-concrete composite beams affect their structural behavior under loading.

July 2, 2026Journal of Composites ScienceOpen Access

Experimental Investigation of the Structural Behavior of Steel–Concrete Composite Beams with Circular Web Openings

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The aim is to evaluate how the location and number of circular web openings in steel-concrete composite beams affect their structural behavior under loading.
Tested six simply supported beam specimens including five with circular web openings and one reference beam without openings.
Kept beam dimensions, material properties, reinforcement details, shear connector arrangement, and loading conditions constant.
Investigated the effects of opening location in critical zones: shear zone, bending zone, and under load points.
Openings in the shear zone showed only a 2.13% reduction in ultimate load capacity, indicating optimal performance.
Openings in the bending zone or under load points resulted in reductions of 9.62% to 11.70% in load capacity.
Findings confirm that opening location is more critical than the number of openings for structural performance.

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Implication

Experimental investigation reveals opening location impacts structural performance in composite beams, suggesting design improvements.

Cite This Study

Shnain et al. (2026) studied this question.

synapsesocial.com/papers/6a45ffa29ed134303130ff1f https://doi.org/10.3390/jcs10070346

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Experimental Investigation of the Structural Behavior of Steel–Concrete Composite Beams with Circular Web Openings

Key Points

Discussion

Implication

Cite This Study

Experimental Investigation of the Structural Behavior of Steel–Concrete Composite Beams with Circular Web Openings

Key Points

Discussion

Implication

Cite This Study

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