Anchorage of corroded bars: eccentric pull-out tests and numerical analysis

Paper in proceeding, 2012

Eccentric pull-out tests were carried out to study (a) the influence of cover cracking and (b) the effect of stirrups, on the bond of corroded bars. Next, an earlier developed corrosion model was extended to include the effect of rust flowing through corrosion cracks. The extended model was used in detailed three-dimensional analyses of the tests. The tests and analyses showed an important effect of the cover cracking in terms of loss of confinement and the flow of rust through the cracks. They also indicated that the bond behavior and the failure were strongly governed by the position of the anchored bar, i.e. corner or middle positions, and the level of the corrosion attack. Stirrups played an important role after cover cracking, as they then became the primary source of confinement. Furthermore, corrosion of stirrups led to a more extensive cover cracking for a relatively low level of corrosion attack.