Abstract
Reinforced concrete (RC) structures are generally subjected to increasing loads, age-related deterioration and design changes that affect the integrity of structures. Therefore, this paper presents an experimental investigation of a carbon fibre reinforced polymer (CFRP) reinforced RC beam under three-point loading. Acoustic emission (AE) was used to monitor the progression of damage. The loading, AE intensity and AE signal strength were analysed and discussed. The analyses were performed using the AE signal collected from CH6 and CH7. The result is that crack nucleation produces high signal intensity compared to other crack modes. Moreover, the intensity plots fit the identified crack modes when the beams were reinforced with CFRP. Therefore, AE can be used to evaluate the performance of the CFRP reinforced RC beam.
Highlights
Reinforced concrete (RC) is the most popular material used in construction industry all over the world
Most researches have shown that the carbon fibre reinforced polymer (CFRP) can increase the strength of RC structure
This paper describes an experimental program to evaluate the beam reinforced with CFRP on the underside RC using the technique Acoustic emission (AE)
Summary
Reinforced concrete (RC) is the most popular material used in construction industry all over the world. Deterioration reduces the strength and integrity of RC structures. Much research has been conducted to reduce the deterioration of RC structure by reinforcing the structure with fibre reinforced polymer (FRP) laminates, such as carbon fibre reinforced polymer (CFRP). Most researches have shown that the CFRP can increase the strength of RC structure. The integrity of the CFRP reinforced structure RC is related to the bonding and surface preparation of the concrete. The bond and the effect of CFRP laminate on concrete surface were studied by Noorsuhada et al [10]. They found that the type of surface preparation affects the adhesion between the two materials in terms of tear strength. Bonding plays an important role in the integrity of the concrete structure, a thorough investigation of the concrete structure reinforced with CFRP is essential
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