Ultimate Shear Resistance of Partially Prestressed Reinforced Concrete I-Beams


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Title: Ultimate Shear Resistance of Partially Prestressed Reinforced Concrete I-Beams

Author(s): Bent S. Lyngberg

Publication: Journal Proceedings

Volume: 73

Issue: 4

Appears on pages(s): 214-222

Keywords: beams (supports); compressive strength: cracking (fracturing) ; deflection: failure: failure mechanisms:l-beams: partial prestressing; plastic analysis: prestressed concrete: prestressing; prestressing steels: reinforced concrete:reinforcing steels.

Date: 4/1/1976

A series of nine partially prestressed reinforced concrete beams was tested to investigate the effect of prestress upon the upper limit of the shear strength, associated with inclined compressive failure of the web. The cross section, web reinforcement, flexural ultimate moment, and shear span were held constant, The numbers of prestressing tendons and amounts of flexural nonprestressed steel were varied. The results showed that the failure load was not influenced by the presence of prestress and is accurately predicted using a perfectly rigid plastic model.


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