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Strength of Materials

, Volume 51, Issue 1, pp 166–174 | Cite as

Study of Bond Properties of Steel Rebars with Recycled Aggregate Concrete. Analytical Modeling

  • M. M. RafiEmail author
Article
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The results of analytical analysis of interfacial bond stress-slip behavior of steel bars embedded in recycled aggregate concrete (RAC) are reported in this paper. Significantly large data from the laboratory pullout tests of specimens were analyzed including the specimens tested by the author. A bond stress-slip constitutive law is proposed for the steel rebars embedded in RAC. The experimental stress–slip responses of specimens were compared with the theoretical predictions. An existing model in the literature was employed for determining the ascending branch of the bond stress–slip curve. Based on the differences in the observed and predicted responses, a modified expression to capture the descending branch of the bond stress–slip curve was proposed. The results of the modified expression correlated well with the observed data of samples tested by the author and those reported in the existing literature.

Keywords

strain compatibility stress–slip response constitutive law bond strength pullout specimen recycled aggregates deformed bar 

Notation

NAC

– natural aggregate concrete

RAC

– recycled aggregate concrete

SD

– standard deviation

τ

– interfacial bond stress

τmax

– maximum interfacial bond stress

c

– concrete cover

c0

– distance between the ribs of the reinforcing bar

db

– diameter of bar

fc

– concrete compressive strength

ld

– rebar embedment length

s

– rebar slip

smax

– maximum rebar slip

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Earthquake EngineeringNED University of Engineering and TechnologyKarachiPakistan

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