Publication: Evaluation of damaged reinforced concrete beams repaired with epoxy injection and strengthening with carbon fibre reinforced polymer using acoustic emission technique
| dc.contributor.author | Saliah, Soffian Noor Mat | |
| dc.date.accessioned | 2024-01-12T07:49:03Z | |
| dc.date.available | 2024-01-12T07:49:03Z | |
| dc.date.issued | 2020-09-01 | |
| dc.description.abstract | Damage due to increasing loading in reinforced concrete (RC) structures is a crucial phenomenon where it may cause structural failure and collapse. Rehabilitation of damaged RC structure is important to restore structural integrity. The most promising techniques are structural crack repair and strengthening. However, assessment on damaged RC structure repaired with epoxy injection and strengthening with carbon fibre reinforced polymer (CFRP) is extremely required. From the literature review, it was found that the damaged RC beam repaired with epoxy injection and strengthened with CFRP using acoustic emission (AE) signal parameters are still limited. This study aimed to investigate, correlate, evaluate and develop flexural crack behavior (crack mode) of RC beam repaired with epoxy injection and strengthened with CFRP supplemented with AE signal parameters namely signal strength, average frequency (AF), rise angle (RA) and intensity analysis (IA). Flexural static test was carried out in the laboratory of heavy structure on RC beam size of 200 mm x 300 mm x 1500 mm. The RC beam was intentionally damaged prior to be repaired with epoxy injection and strengthened with CFRP. The flexural static test was carried out until failure. All analyses were derived from the AE signal collected at sensors labeled CH6 and CH7. Both sensors were then compared, analysed and discussed. It is found that the AE signal parameter are dependent on the type of repaired and strengthened RC beams. At the same time, good relationships between load application, AE signal parameter, crack modes and crack patterns were inferred on the RC beams. From the AF vs RA value, clear trend between the relationship of the crack mode on identification of tensile crack and shear crack were found. The IA well corresponds to the repaired and strengthened technique for each crack mode by the plots of intensity zone at CH6 and CH7. In addition, the understanding on visual inspection supplemented with AE technique is useful in future monitoring and maintaining of damaged RC structure repaired with epoxy injection and strengthened with CFRP. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/18062 | |
| dc.language.iso | en | |
| dc.title | Evaluation of damaged reinforced concrete beams repaired with epoxy injection and strengthening with carbon fibre reinforced polymer using acoustic emission technique | |
| dc.type | Resource Types::text | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |