Assessment of diagonal-tension failure load in reinforced concrete beams without stirrups through the study of size effect
DOI:
https://doi.org/10.3989/ic.14.092Keywords:
Reinforced concrete, diagonal-tension failure, size effect, concrete shearAbstract
This paper proposes an expression to evaluate the load causing diagonal-tension failure of reinforced concrete beams without stirrups. The study is based on experimental tests results and basic concepts of Fracture Mechanics. It is observed that longitudinal reinforced bars modify the trend in size effect as compared to the one shown by un-reinforced notched beams. To quantify this effect, a theoretical model is established and validated against tests of reinforced concrete beams. From the proposed model, an expression is developed to determine the diagonal-tension strength in beams without stirrups. To facilitate the application in structural design, a series of simplifications has been done, so that the final expression is based on the parameters conventionally used in the design of concrete structures.
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