Research Article
Jan 1960
Concrete Beams and Columns with Bundled Reinforcement
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VIEW THE REPLYAuthors: Norman W. Hanson, M.ASCE, and Hans ReiffenstuhlAuthor Affiliations
Publication: Transactions of the American Society of Civil Engineers
Volume 125, Issue 1
Abstract
This paper reports on tests of pairs of large beams with conventionally spaced and with bundled longitudinal reinforcement. The bundles of reinforcement used comprised groups of four No. 6, four No. 8, or three No. 9 touching bars. Pairs of beams were compared with respect to width of flexural cracks, steel stress distribution, deflection, and ultimate strength. No significant difference in behavior or ultimate strength was found for bundled as compared to spaced reinforcement.
Tied columns were tested by concentric loading to compare spaced and bundled longitudinal reinforcement consisting of twelve No. 6 or twelve No. 8 bars. Comparison with respect to ultimate strength indicated that bundling is a safe detailing procedure when adequate ties are provided. This true even for 6. 6% longitudinal reinforcement. Splicing of bundled reinforcement in columns was explored and found to be feasible.
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Published In
Transactions of the American Society of Civil Engineers
Volume 125 • Issue 1 • January 1960
Pages: 889 - 905
Copyright
© 1960 American Society of Civil Engineers.
History
Published in print: Jan 1960
Published online: Feb 10, 2021
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Norman W. Hanson, M.ASCE
Assoc. Development Engr., Research and Developrnent Div., Portland Cement Assn., Chicago, Ill
Hans Reiffenstuhl
Visiting Engr., Research and Development Div., Portland Cement Assn., Chicago, Ill
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