Title: Theory for the Combined Action of Bending Moment and Shear in Reinforced and Prestressed Concrete Beams REINFORCED AND PRESTRESSED CONCRETE BEAMS

Author(s): Mogens Lorentsen

Publication: Journal Proceedings

Volume: 62

Issue: 4

Appears on pages(s): 403-420

Keywords: beam, cracking, prestressed concrete, reinforced concrete, research, shear strength, theory

DOI: 10.14359/7701

Date: 4/1/1965

Abstract:
The influence of bond on the strength of reinforced and prestressed concrete beams is described. Test results described in the paper show that the presence of bond may induce shear failure. On the basis of this observation a theory for predicting the shear strength of concrete beams, is introduced. According to the theory the shear is carried partly by beam action, partly by arch action. It is shown, that the shear strength of beams without web reinforcement may be expressed as junction of the strength of the crack lamellas, the shear span, and the flexural cracking moment.