Experimental Evaluation of Corrosion Effect on Bond Between Steel and Concrete in Presence of Cyclic Action
Corrosion modifies the steel-concrete interface in reinforced concrete structures. The efficiency of the connection between the two materials is reduced and the structural behavior both in service and in ultimate condition is affected. Moreover in structures subjected to cyclic load, a simultaneous mechanical deterioration due to the load is present. In this work an experimental analysis on reinforced concrete structures under both cyclic load and corrosion of reinforcing bars is presented. Three couples of reinforced concrete ties are connected in series and subjected to the same stress variation in order to produce the cracking conditions and to activate the bond mechanism. However, while one of the two reinforced concrete ties is only subjected to cyclic load, the second one is also corroded using an accelerated electrochemical corrosion process. The simultaneous effect of the cyclic load and corrosion is evaluated monitoring the crack opening on the structures during the test and by means of visual inspection of the sample. The test results show the correlation between the mechanism of bond and the average level of stresses for an amplified stress range.
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
L. Giordano et al., "Experimental Evaluation of Corrosion Effect on Bond Between Steel and Concrete in Presence of Cyclic Action", Key Engineering Materials, Vols. 417-418, pp. 345-348, 2010