|
Title |
Damage Detection of RC Beams Strengthened with FRP Sheet Using the Acoustic Emission Method
|
|
Authors |
서수연(Soo-Yeon Seo) ; 하니프 엠 우스만(M. Usman Hanif) ; 트란 하이 반(Hai Van Tran) ; 윤현도(Hyun-Do Yun) |
|
DOI |
https://doi.org/10.4334/JKCI.2024.36.5.483 |
|
Keywords |
균열; 음향방출; 섬유보강폴리머 시트; 철근콘크리트 보; 부착문제 crack; acoustic emission; fiber reinforced polymer (FRP) sheet; RC beam; debonding problem |
|
Abstract |
The purpose of this study is to identify cracks and bond damage in fiber reinforced polymer (FRP) sheets applied to reinforced concrete (RC) beams, using the acoustic emission (AE) technique. First, in order to investigate the reinforcing effect of FRP sheets, RC beams with and without FRP strengthening were made. Additionally, a beam was strengthened with an FRP sheet that included partially debonded areas on the bottom surface. AE sensors were attached to the lower surface of all specimens to obtain relevant information. The AE responses were calibrated using the pencil-lead break test, and the responses were monitored during the loading test. The results showed that the strength of the beam increased due to the FRP sheet, although somewhat brittle fracture behavior was observed. The AE technique successfully detected the initiation and propagation of concrete cracks, as well as the location of FRP sheet debonding.
|