Title:
Tensile Bond Strengths of Deformed Bars of High-Strength
Concrete
Author(s):
Shyh-Jiann Hwang, Yih-Ren Leu, and Han-Lin Hwang
Publication:
Structural Journal
Volume:
93
Issue:
1
Appears on pages(s):
11-20
Keywords:
bond (concrete to reinforcement); deformed reinforcement;
high-strength concretes; tensile properties.
DOI:
10.14359/9835
Date:
1/1/1996
Abstract:
Results are presented from an experimental investigation into the tensile bond strengths of deformed bars embedded in high-strength concrete (fc' < 70 MPa). A total of 20 beam specimens in two series was tested statically to measure both the splice strength and the development strength. Other variables included concrete strength, anchorage length, and the amount of transverse reinforcement. The bond performance of high-strength concrete without silica fume was found to be similar to that of normal-strength con-crete. The equivalence between the tensile development length and the ten-sile splice length for high-strength concrete was established. The applicability of existing models to predict the bond strength of high-strength concrete was examined. The tests showed that total confinement beyond the currently accepted limit was still effective for the bond action of high-strength concrete.