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Title |
Influence Factors of Maximum Shear Strength Limit of Reinforced Concrete Deep Beams
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DOI |
https://doi.org/10.4334/JKCI.2024.36.4.375 |
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Keywords |
깊은보, 최대 강도 제한, 전단강도, 스트럿-타이 모델, 영향 요소
deep beams, maximum strength limit, shear strength, strut and tie model, influence factors |
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Abstract |
Structural design codes specify the strength limits for RC deep beams. To reasonably limit the maximum strength, the factors affecting strength must first be identified. The maximum strength limits in the KDS 140 20 00 and ACI 318-19 codes proportional to the square root of the compressive strength of concrete, but they do not account for the effects of shear span-to-depth ratio and size effect. Therefore, for deep beams with short spans or using high-strength concrete, the strength is limited by the maximum strength, which may result in uneconomical design. In this study, the test results of 705 RC deep beams with various variables were analyzed to evaluate the factors affecting the maximum strength limit. The analysis shows that the maximum strength limit of deep beams should be proportional to the compressive strength of concrete and should reflect the influence of shear span-to-depth ratio.
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