Research on Bond Behavior between Recycled Concrete and Steel Rebar for Confinement of Transverse Stirrups
YANG Haifeng
L(U) Liangsheng
DENG Zhiheng
ZHANG Xinying
Abstract：66 pull-out tests were carried out to study the bond behavior between recycled concrete and steel rebar,considering different levels of recycled coarse aggregate substitution,diameters of steel rebar and the transverse stirrup.The effects of these factors on the bond behavior were analyzed and the bond-slip constitutive relation between recycled concrete and steel bar was established.The splitting bond strength equation for specimens with stirrups was also proposed based on the model of van der Veen.The results show that the shape of bond-slip curves for all the specimens are similar,and the expressions of these curves could be identical.For specimens with stirrups,the descending part of bond-slip curves become flatter and the b values are more concentrate,b=1 can be used as the boundary between splitting failure and splitting-pull out failure for specimens without stirrups.The proposed constitutive relation and theoretical bond strength formula fit the test data well.
Keywords：confinement of stirruprecycled concretebond-slipconstitutive relationbond strength
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 36-41 )