What question did this study set out to answer?

This study aims to examine the effects of opening dimensions on the behavior and failure mechanisms of slender reinforced concrete beams.

Experimental Study on Cracking Patterns, Failure Mechanisms, and Revised Classification of Slender RC Beams Containing Elongated Web Openings

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Experimental study reveals how varying opening sizes affect load capacity in slender beams, suggesting revised design practices.

This study aims to examine the effects of opening dimensions on the behavior and failure mechanisms of slender reinforced concrete beams.
Categorized ten beam specimens into two groups based on opening size ratios.
Conducted load testing to determine cracking behavior and ultimate load capacity.
Validated findings through finite element analysis comparing experimental and numerical results.
Beams with small openings achieved ultimate loads of 14–17 kN, exhibiting predictable flexural behavior.
Beams with large openings showed a significant capacity reduction to 6.4–10.5 kN due to complex failure modes.
Loading capacity decreased by up to 60% with the presence of four plastic hinges in large openings.

S et al. (2026) studied this question.

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