Distribution of Bond Stress in Concrete Pull-Out Specimens


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Title: Distribution of Bond Stress in Concrete Pull-Out Specimens

Author(s): David Watstein

Publication: Journal Proceedings

Volume: 43

Issue: 5

Appears on pages(s): 1041-1052

Keywords: none

Date: 5/1/1947

The purpose of this investigation was to determine the effect of length of embedment and the kind of deformation pattern of the reinforcement bar on the distribution of bond stress in pull-out specimens. Twenty-five specimens 6-in. in diameter by 8-in. long and 25 specimens 6-in. in diameter by l2-in. long, containing 3/4-in. diameter round bars of five different types were tested. The bond stresses in the 8-in. specimens were con- siderably more uniform along the length of the bar than were those in the 12-in. specimens. Bond stresses increased most rapidly with slip at the loaded end of the bars, and’ in ‘general, ‘least rapidly at the free end. This divergence of the values of bond stresses for a given slip was more pronounced for the longer lengths of embedment.