Abstract
In this work, eight prestressed reinforced self-compacting concrete (SCC) beams were tested in order to investigate the shear stresses transfer mechanism, the shear failure mode and the shear performance of prestressed SCC beams without stirrups. The principal parameters included concrete compressive strength, longitudinal tensile reinforcement ratio ρ l and prestressing force. The results indicated that the shear resistance corresponding to the first flexure-shear crack increases with the amount of longitudinal tensile reinforcement and the prestressing force. The ultimate shear resistance V u increases with the increase of the concrete compressive strength. V u increases also with ρ l and the prestressing force. The failure mode of the tested beams is similar to a reinforced normal concrete beams without stirrups, namely diagonal compression failure. The diagonal crack location was analyzed in this work and the values obtained are acceptable in comparison with the test data. The shear transfer mechanism can be explained by an arch system. The predictions provided by ACI and Eurocode were compared with those obtained by the experimental test.
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Acknowledgments
The authors wish to thank greatly the Région Champagne-Ardenne, which supported the project entitled “Développement et Optimisation du Nouveau Béton Autoplaçant”. The authors are especially grateful to Patrick Jupillat and Jean-Marc Lointier, technicians of the civil engineering laboratory of the Université de Reims Champagne-Ardenne.
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Shen, J., Yurtdas, I., Diagana, C. et al. Experimental investigation on the shear performance of prestressed self-compacting concrete beams without stirrups. Mater Struct 48, 1291–1302 (2015). https://doi.org/10.1617/s11527-013-0234-y
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DOI: https://doi.org/10.1617/s11527-013-0234-y