Research Article
Oct 1966
Plastic Hinging in Reinforced Concrete
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 92, Issue 5
Abstract
The complete load-deflection history of 18 beams tested during 1952-54 and 18 beams tested during 1959-61 at the Univ. of Ill. allowed a study of the factors which contribute to ductility. All tests involved simple spans with load applied through a column stub at midspan to simulate the beam-column connection in a reinforced concrete frame. This study involved only beams without axial load. Primary variables studied included depth, compression steel ratio, concrete strength, amount of transverse reinforcement, and ratio of compression steel area to tension steel area. The tests indicate clearly the contribution of compression steel to ductility of reinforced concrete beams. The modes of failure reflected the importance of confinement of concrete in the compression zone in insuring the capacity for large plastic rotation at the joint. In all cases the first crushing of concrete (∈c = 0.004), usually considered as ultimate, was found to be associated with a deflection much smaller than that corresponding to the ultimate load. For beams with compression steel the reverse ductility beyond first crushing was large, the deflection at ultimate load in some cases being more than ten times the first crushing deflection.
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Information
Published In
Journal of the Structural Division
Volume 92 • Issue 5 • October 1966
Pages: 45 - 64
Copyright
© 1966 American Society of Civil Engineers.
History
Published in print: Oct 1966
Published online: Feb 1, 2021
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Authors
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Ned H. Burns, AM.ASCE
Assoc. Prof. of Civ. Engrg., Univ. of Texas, Austin, Tex.
Chester P. Siess, F.ASCE
Prof. of Civ. Engrg., Univ. of Illinois, Urbana, Ill.
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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.