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.