Abstract
Using the specimen which imitated ASR, experimental tests were performed to investigate the failure mechanism of stirrup, degradation of appearance, and deformation characteristic due to ASR. In this experiment, type of stirrup, ratio of stirrup, amount of expansion, and bend radius were used as parameters with the specimen, imitating the existing structure to one fourth scale. The hollow section, in which expansive concrete was used, was prepared in specimen. As a result, it was verified, concentration of appearance damage did not arise by fracture of one reinforcing bar in current experimental tests, and the progress of degradation of reinforcing bar with large initial damage was larger. It became clear that there was no relationship between fracture of stirrup and its physical-properties.
