Fibre-reinforced plastic (FRP) composites are extensively used to retrofit civil structures. However, the quality and the characteristics of the bond between the FRP and the structure are critical to ensure the efficacy of the retrofit. For this reason, effective non-destructive evaluation (NDE) methods are often necessary to assess the bonding conditions. This article presents an ultrasonic technique for detecting defects at the FRP-substrate interface. The technique uses the Akaike Information Criterion, to detect automatically the onset of the ultrasonic signals, and the novel Equivalent Time Lenght (ETL) parameter, to quantify the energy of the propagating ultrasonic signals along the interface between FRP and concrete. The uniqueness of the ETL is that it is not affected by the coupling conditions between the ultrasonic probes and the structure. The proposed NDE technique has been tested numerically by performing 2D Finite-Element analysis and experimentally on reinforced concrete samples. The results show that the method is robust and cost-effective.

Emma La Malfa Ribolla, ., Mohsen Rezaee Hajidehi, ., Piervincenzo, R., Giuseppe Fileccia Scimemi, ., Antonino, S., Giuseppe, G. (2017). Ultrasonic inspection for the detection of debonding in CFRP-reinforced concrete. STRUCTURE AND INFRASTRUCTURE ENGINEERING, 14(6), 807-816 [10.1080/15732479.2017.1384843].

Ultrasonic inspection for the detection of debonding in CFRP-reinforced concrete

Emma La Malfa Ribolla
;
Mohsen Rezaee Hajidehi;Piervincenzo Rizzo;Giuseppe Fileccia Scimemi;Antonino Spada;Giuseppe Giambanco
2017-01-01

Abstract

Fibre-reinforced plastic (FRP) composites are extensively used to retrofit civil structures. However, the quality and the characteristics of the bond between the FRP and the structure are critical to ensure the efficacy of the retrofit. For this reason, effective non-destructive evaluation (NDE) methods are often necessary to assess the bonding conditions. This article presents an ultrasonic technique for detecting defects at the FRP-substrate interface. The technique uses the Akaike Information Criterion, to detect automatically the onset of the ultrasonic signals, and the novel Equivalent Time Lenght (ETL) parameter, to quantify the energy of the propagating ultrasonic signals along the interface between FRP and concrete. The uniqueness of the ETL is that it is not affected by the coupling conditions between the ultrasonic probes and the structure. The proposed NDE technique has been tested numerically by performing 2D Finite-Element analysis and experimentally on reinforced concrete samples. The results show that the method is robust and cost-effective.
2017
Settore ICAR/08 - Scienza Delle Costruzioni
Emma La Malfa Ribolla, ., Mohsen Rezaee Hajidehi, ., Piervincenzo, R., Giuseppe Fileccia Scimemi, ., Antonino, S., Giuseppe, G. (2017). Ultrasonic inspection for the detection of debonding in CFRP-reinforced concrete. STRUCTURE AND INFRASTRUCTURE ENGINEERING, 14(6), 807-816 [10.1080/15732479.2017.1384843].
File in questo prodotto:
File Dimensione Formato  
Ultrasonic inspection for the detection of debonding in CFRP reinforced concrete.pdf

Solo gestori archvio

Descrizione: Articolo principale
Dimensione 3.57 MB
Formato Adobe PDF
3.57 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/259344
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 35
social impact