A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Identification of ungrouted tendon duct in prestressed concrete by SIBIE
In the impact-echo method, the presence and the locations of defects in concrete are estimated from identifying peak frequencies in the frequency spectra, which are responsible for the resonance due to time-of-flight from the defects. In practical applications, however, spectra obtained include so many peak frequencies that it is fairly difficult to identify the defects correctly. SIBIE (Stack Imaging of spectral amplitudes Based on Impact Echo) procedure is developed as an imaging technique applied to the impact-echo, where defects in concrete are identified visually at the cross-section. In this study, the SIBIE procedure is applied to identify ungrouted post-tensioning ducts in prestressed concrete. Concrete slabs containing an ungrouted duct, a partially-grouted duct, and a fully-grouted duct of metal and polyethylene sheaths were tested. It is demonstrated that the defect can be identified with reasonable accuracy by SIBIE in all the cases tested.
Identification of ungrouted tendon duct in prestressed concrete by SIBIE
In the impact-echo method, the presence and the locations of defects in concrete are estimated from identifying peak frequencies in the frequency spectra, which are responsible for the resonance due to time-of-flight from the defects. In practical applications, however, spectra obtained include so many peak frequencies that it is fairly difficult to identify the defects correctly. SIBIE (Stack Imaging of spectral amplitudes Based on Impact Echo) procedure is developed as an imaging technique applied to the impact-echo, where defects in concrete are identified visually at the cross-section. In this study, the SIBIE procedure is applied to identify ungrouted post-tensioning ducts in prestressed concrete. Concrete slabs containing an ungrouted duct, a partially-grouted duct, and a fully-grouted duct of metal and polyethylene sheaths were tested. It is demonstrated that the defect can be identified with reasonable accuracy by SIBIE in all the cases tested.
Identification of ungrouted tendon duct in prestressed concrete by SIBIE
Identifizierung von schlecht vermörtelten Spannkanälen in vorgespanntem Beton durch SIBIE
Ohtsu, Masayasu (author) / Yamada, Massahiko (author) / Nakai, Yoko (author)
2009
7 Seiten, 10 Bilder, 5 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
Case studies on ungrouted tendon-duct in prestressed concrete models by SIBIE
| British Library Online Contents | 2010
Imaging of ungrouted tendon ducts in prestressed concrete by improved SIBIE
| Tema Archive | 2007
Modified SIBIE procedure for ungrouted tendon ducts applied to scanning impact-echo
| British Library Online Contents | 2010