| Title |
Acoustic Emission Activity Characteristics of CFRP sheets Strengthened RC Beams with Damage Levels |
| Authors |
Yun Hyun-Do ; Kim Sun-Woo ; Jeon Su-Man ; Seo Soo-Yeon ; Choi Chang-Sik ; Choi Ki-Bong |
| Keywords |
Acoustic Emission ; Damage Level ; Carbon Fiber Reinforced Polymer Sheets ; Reinforced Concrete Beam |
| Abstract |
In this study, the application of the acoustic emission (AE) technique to monitor damage levels in reinforced concrete beam strengthened in flexure with carbon fiber reinforced polymer (CFRP) sheet was investigated. The objective of this study is to take the first step in creating a user-friendly health monitoring system for reinforced concrete structure strengthened with CFRP sheet using AE. Five beams were 200 x 270mm in cross section and were tested under three-point bending over a span of 1,700mm. The AE signal were collected and analyzed for all specimens. The AE parameters were analyzed for damage levels(based on initial crack, crack propagation, yielding of main bars, and fracture or rip-off of CFRP sheet) of all specimens. Results from this study show that event, amplitude versus frequency, and amplitude versus duration of a signal, showed a clear difference for different loading stages depending upon the active damage mechanism. |