Shear Strength of Large Beams

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Abstract
This paper considers the problem of the effect of absolute size on the shear strength of reinforced concrete beams. The results of previous tests are compared and a brief description is given of the way in which beams carry shear force, which is consistent with recent data. Tests on a series of 15 beams in which true scale models were used, with a depth range of 150-1000 mm (6-40 in.) are described. The test results indicate that, when beams are modeled correctly, the effect of absolute size is small. In practice it may not always be possible to design beams of the type in which the size effect is insignificant. For these cases, design advice is given.

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