Development/Splice Strength of Reinforcing Bars Embedded in Plain and Fiber Reinforced Concrete

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Title: Development/Splice Strength of Reinforcing Bars Embedded in Plain and Fiber Reinforced Concrete

Author(s): M. H. Harajli

Publication: Structural Journal

Volume: 91

Issue: 5

Appears on pages(s): 511-520

Keywords: bond (concrete to reinforcement); building codes; concretes; fibers; reinforcing steels; slippage; splicing; Structural Research

DOI: 10.14359/4163

Date: 9/1/1994

Abstract:
This study concentrates on analytical evaluation of the bond strength and anchorage characteristics of reinforcing bars embedded in plain and fiber reinforced concrete. The analysis is based on a numerical solution scheme of the bond problem and incorporates an experimentally derived local bond stress-slip relationship applicable to pullout and splitting-type bond failure. The analysis accurately reproduced bond test results of reinforcing bars embedded inside exterior beam-column connections and showed very good agreement with the experimental results used by Orangun, Jirsa, and Breen (1975, 1977) to develop their well-known expression of development/splice strength. The results of parametric evaluation undertaken suggest that development/splice strength design expressions derived from test data in which the steel stresses were below yield at bond failure are unsafe when extended linearly to the post-yield range of reinforcing bars. Similar to ordinary transverse reinforcement, the presence of steel fiber reinforcement was found to increase the ductility of bond failure and improve development/splice strength in comparison with plain unconfined concrete.


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