期刊
THEORETICAL AND APPLIED FRACTURE MECHANICS
卷 112, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.tafmec.2020.102890
关键词
Concrete repair; Severely damaged beam; Acoustic emission; Damage modes; Rise angle value
资金
- Universiti Teknologi MARA, Cawangan Pulau Pinang
- Implementation and Coordination Unit (ICU) Prime minister Department (ICU JPM Pulau Pinang) [100-IRMI/GOV16/6/2 (001/2017)]
This study explores the restoration and repair of reinforced concrete beams damaged by monotonic loading using epoxy resin and the acoustic emission technique. The repaired beam showed a higher maximum load than the reference beam, but the AE analysis indicated a lower emission value, suggesting a direct correlation between average frequency, rise angle value, and crack patterns on the beams.
This paper explores and analyses how reinforced concrete beams, can be restored and repaired after sustaining damage from monotonic loading. Epoxy resin was used to repair the beams. By employing a technique known as the acoustic emission (AE) technique, the damage sustained by the beams under monotonic loading can be evaluated. The reference beam (S1C), and the repaired beam (S4B), were both prepared. The load, the acoustic emission parameters, and the crack modes were investigated and analysed. The signal strength, rise angle value, and average frequency were analysed and discussed. The S4B was found to produce a maximum load that measured higher than the S1C. However, the AE analyses indicated a different result where the S4B produced a lower value than S1C. The average frequency and rise angle value with the patterns of cracks on the beams are directly correlated. Hence, two cracks were identified i.e. tensile and shear cracks. It is safe to deduce that to assess the soundness of the epoxy injected concrete beams, the AE technique can be applied.
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