New model for prediction of ultimate load of prestressed RC deep beams

Abstract

Few relations were presented in the literature for computing the shear strength of prestressed concrete deep beams. However, these relations have shortcomings to predict the ultimate load of such members. In this study, a new simple model based on Strut-and-Tie Model (STM) was put forwarded to obtain the ultimate load of prestressed reinforced concrete deep beams and seven specimens were tested experimentally. The effects of prestressing were considered by using an equivalent load and added members of the truss in the proposed model. This model can control the flexural, bearing and shear modes of failure. In order to verify the suggested model, the results were compared with experimental data. The accuracy of the proposed model was shown by the comparison of results.