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- Zerstörungsfreie Prüfung (4)
- Erfolgskontrolle Rissinjektion (3)
- Risse (3)
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- Ultraschall (3)
- Prestressed concrete structures (2)
- Radar (2)
- Reconstruction calculation (2)
- Ultraschallecho (2)
- Ultrasonic echo (2)
- Air-coupled ultrasound (1)
- Bildgebende Darstellung (1)
- Brücke (1)
- Compaction faults (1)
- EFIT Modelling (1)
- EFIT modelling (1)
- Hagen (1)
- Impact-echo (1)
- Impakt-Echo (1)
- Phase evaluation (1)
- Post-tensioned concrete (1)
- Rekonstruktionsrechnung (1)
- Scannende Systeme (1)
- Spannglied (1)
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- Synthetic aperture focusing technique (SAFT) (1)
- Ultrasonic imaging (1)
Eingeladener Vortrag
- nein (2)
Ultrasonic imaging of tendon ducts enables the precise localisation of grouting faults in many cases. Additionally to well known criteria for detecting grouting faults in tendon ducts recently new possibilities were developed. Two main effects influence the complex behaviour of wave propagation and reflection: a) different arrangement and number of strands or internal rebars; b) superposition of reflecting signals and different wave modes propagating into the interface region around the tendon duct. In order to understand the experimental results, EFIT modelling is performed (EFIT: Elastodynamic Finite Integration Technique).