Shear design of prestressed and reinforced concrete beams Available to Purchase

There is much research relating to shear strength of reinforced and prestressed concrete beams. However, some current shear design provisions are still too complex to be easily understood by engineers, with a different equation for each particular situation. Other formulations are too simple and present a large scatter when compared with the experimental results, owing to the difficulties to account, in a single empirical or analytical formulation, for the large amount of parameters that govern the shear failure. With the aim of solving these problems, a tension shear design procedure for reinforced concrete members was previously developed by the authors. The current paper presents the extension of this method to prestressed concrete beams. For beams with web reinforcement, the procedure is based on a truss model with variable angle of inclination of the struts plus a concrete contribution. The angle is obtained by compatibility, based on the modified compression field theory, and it is able to predict the interaction with axial loads and bending moments. For beams without stirrups, the method is based on the model code procedure, taking into account the results of an artificial neural network that is developed. Finally, different databases, most of them published by other authors after the development of this method, are used to test satisfactorily the ability of this proposal.