Title: Influence of Rib Dimensions of Reinforcing Bars on Bond and Bendability

Author(s): S. Soretz and H. Holzenbein

Publication: Journal Proceedings

Volume: 76

Issue: 1

Appears on pages(s): 111-128

Keywords: bending (reinforcing steels); bend tests; bond (concrete to reinforcement) ; bond stress; deformed reinforcement; lugs; pullout tests; slippage.

DOI: 10.14359/6939

Date: 1/1/1979

Abstract:
A contribution to the interdependence of bond and bending capacity of ribbed reinforcing bars by means of pullout and rebend tests. Decreasing height of lugs leads to increasing bending capacity; the bond characteristic, however remains unchanged in the practical usable range as long as the lug distance decreases proportionally to the lug height. Transverse ribs binding in the longitudinal ribs lead to the highest bond, but the lowest bending capacity. In the practical used range of 40 to 75 degree the lug inclination has no significant influence on the bond; the bending capacity, however, decreases with increasing inclination of the lugs to the bar axis. The form of the cross section of the lugs changing from a rectangle to a flat trapezoid has no significant influence to the bond; the bending capacity, however, increases significantly.