Structural Behavior of Shear-Critical RC Slender Beams with Corroded Properly Anchored Longitudinal Steel Reinforcement

Experimental shear tests of reinforced concrete beams with corroded longitudinal reinforcement

“…It should be noted that in Azam and Soudkis' test specimens, the tension reinforcement was fully anchored using hooks at the end regions of the RC members, and the maximum corrosion rate measured from the specimens was 5.78%. In addition, Azam and Soudki 18,19 predicted the shear strength of the corroded specimens using the strut-and-tie model (STM), and their analysis results agreed well with the experiment results. On this basis, this study also evaluated the shear strengths of the specimens using the STM approach, and these evaluation results are discussed in the following section.…”

“…This tendency was also found by Azam and Soudki. 19 Moreover, as mentioned in the previous section, the impressed current density (i corr = 1, 000 μA/cm 2 ) used in the accelerated corrosion test was considerably large, which led to a difference between the corrosion rate calculated from Faraday's law and the actual corrosion rate. Meda et al 29 and Imperatore et al 30 reported that, when the current is introduced to the reinforcement embedded in concrete, the corrosion process would not start immediately because of the presence of concrete.…”

“…As afore-mentioned, the shear strengths and deformation capacities of the NH-3, NH-8, and NH-15 specimens were significantly improved compared with those of the NH-0 specimen with no corrosion damage, which is consistent with the test results reported by Azam and Soudki. 18,19 According to their test results, the shear strengths of the RC beam specimens with corroded longitudinal reinforcement were about two times higher than that of the non-corroded control specimen, and it was also reported that this was because the load transfer mechanism of corroded RC members was changed from beam action to tied-arch action due to the loss of bond performance of the corroded tension reinforcement. It should be noted that in Azam and Soudkis' test specimens, the tension reinforcement was fully anchored using hooks at the end regions of the RC members, and the maximum corrosion rate measured from the specimens was 5.78%.…”

“…Carins, 14 Raoof and Lin, 15 Jeppsson and Thelandersson, 16 and Toongoenthong and Maekawa 17 conducted shear tests of RC beam specimens, in which pseudo-corrosion damage was indirectly introduced in tensile reinforcement by utilizing the debonding method between the reinforcement and surrounding concrete. On the other hand, Azam and Soudki 18,19 and Lachemi et al 19 conducted shear tests of corroded RC members, in which corrosion damage was realistically introduced by applying constant electric current to longitudinal tension reinforcement. However, these previous studies reported inconsistent test results on the shear performance of corroded RC members.…”

Behaviour of Reinforced Concrete Beams Without Stirrups Subjected to Steel Reinforcement Corrosion

“…A number of studies (Azam, Soudki 2013, 2012Xue, Seki 2010;Toongeonthong, Meakawa 2004;Satoh et al 2003;Cairns 1995;Raoof, Lin 1997) have been reported in the literature on effect of corrosion on behaviour of RC beams without stirrups. However, these studies assumed proper anchorage of the reinforcement but there may be conditions in service when anchorage is also impaired due to corrosion.…”