Abstract
The present study concerns the characterization of the fracture process in
concrete beams which are externally reinforced by means of composite materials. The reinforcement comes in the form of CFRP (Carbon Fiber Reinforced Polymer) strip and TRC (Textile Reinforced Cement) layer. In order to monitor the accumulation of fracture beneath the non-transparent layer, AE (Acoustic Emission) sensors are used. The results show that the different mechanisms starting from concrete cracking due to tensile stresses at the bottom up to the shear debonding of the patches exhibit quite distinct acoustic signatures and can be identified. Waveform parameters such as duration and frequency content provide strong characterization capacity concerning the different processes. Valuable feedback is supplied by DIC (Digital Image Correlation) which verifies the moments of debonding by the significant strain release on the surface of the patch. Discussion is done on the in-situ application of this methodology and the limitations that may apply due to scattering and damping on the propagating waves.
concrete beams which are externally reinforced by means of composite materials. The reinforcement comes in the form of CFRP (Carbon Fiber Reinforced Polymer) strip and TRC (Textile Reinforced Cement) layer. In order to monitor the accumulation of fracture beneath the non-transparent layer, AE (Acoustic Emission) sensors are used. The results show that the different mechanisms starting from concrete cracking due to tensile stresses at the bottom up to the shear debonding of the patches exhibit quite distinct acoustic signatures and can be identified. Waveform parameters such as duration and frequency content provide strong characterization capacity concerning the different processes. Valuable feedback is supplied by DIC (Digital Image Correlation) which verifies the moments of debonding by the significant strain release on the surface of the patch. Discussion is done on the in-situ application of this methodology and the limitations that may apply due to scattering and damping on the propagating waves.
| Original language | English |
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| Title of host publication | Proceedings of the 31st Conference of the European Working Group on Acoustic Emission (EWGAE) |
| Place of Publication | Dresden, Germany |
| Pages | 1-7 |
| Number of pages | 7 |
| Publication status | Published - 2014 |
| Event | 31st Conference of the European Working Group on Acoustic Emission (EWGAE) - Dresden, Germany Duration: 3 Sep 2014 → 5 Sep 2014 |
Conference
| Conference | 31st Conference of the European Working Group on Acoustic Emission (EWGAE) |
|---|---|
| Abbreviated title | EWGAE |
| Country/Territory | Germany |
| City | Dresden |
| Period | 3/09/14 → 5/09/14 |