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.