Shear Performance of Reinforced Concrete Beams with Corroded Stirrups Strengthened with Carbon Fiber-Reinforced Polymer

摘要

This paper presents the results of an experimental and analytical study of the shear performance of reinforced concrete (RC) beams with corroded stirrups strengthened with CFRP. Two groups of beams, each with eight specimens, were constructed and the embedded stirrups were subjected to accelerated corrosion in which different corrosion damage levels were produced. One group of beams was corroded without strengthening, while the other group of beams was corroded and then strengthened in shear with externally bond carbon fiber-reinforced polymer (CFRP) sheets. The failure mode, midspan deflection, and shear capacity of all the specimens were investigated. Based on the analytical study, the models to predict remaining shear capacity of corrosion-damaged and corroded-strengthened beams were proposed. The validness of the proposed models was verified through comparison with the experimental data.