Research Article
Dec 1974
Shear Strength of Post-Tensioned Daps in Prestressed Concrete Beams
Publication: Journal of the Structural Division
Volume 100, Issue 12
Abstract
In prestressed concrete beams with dapped ends, inclined shear cracks appear frequently at early stages of loading. A theoretical solution based on elasticity methods was formulated to represent the onset of failure at the dapped regions. The solution gave a quantitative prediction of the critical tensile stresses at a point close to and very near the dap root. Experiments were conducted on six prototype prestressed concrete T-beams. The beams were pretensioned longitudinally and were provided with post-tensioned, high-strength, steel web reinforcement. The variables included: (1) geometry of the dapped ends; (2) type of web reinforcement in dapped regions; (3) ratio of shear span to depth of beam; and (4) prestress level. The results indicated that shear strength of prestressed concrete beams can be predicted with reasonable accuracy, and that dapped regions can be prestressed with inclined high-strength steel bars to control shear cracking at the working load.
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Information
Published In
Journal of the Structural Division
Volume 100 • Issue 12 • December 1974
Pages: 2403 - 2418
Copyright
© 1974 American Society of Civil Engineers.
History
Published in print: Dec 1974
Published online: Feb 1, 2021
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Authors
Affiliations
Ali A. Hamoudi
Asst. Prof. of Civ. Engrg., Univ. of Baghdad, Baghdad, Iraq
Michael K.S. Phang, M.ASCE
Engrg. Specialist and Project Engr., Van Houten Assocs., Inc., New York, N.Y.; formerly, Assoc. Prof. of Civ. Engrg., Rensselaer Polytechnic Inst., Troy, N.Y.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.