Filtern
Erscheinungsjahr
Dokumenttyp
- Beitrag zu einem Tagungsband (16)
- Beitrag zu einem Sammelband (10)
- Vortrag (5)
- Posterpräsentation (4)
- Zeitschriftenartikel (3)
- Forschungsbericht (3)
- Buchkapitel (2)
- Dissertation (1)
- Sonstiges (1)
Referierte Publikation
- nein (45) (entfernen)
Schlagworte
- Zerstörungsfreie Prüfung (6)
- Monitoring (5)
- Ultraschall (5)
- Ultraschallecho (5)
- Beton (4)
- Concrete (3)
- Phased array (3)
- Radar (3)
- SealWasteSafe (3)
- Borehole probe (2)
- Embedded sensors (2)
- Engineered barrier (2)
- Erfolgskontrolle Rissinjektion (2)
- Modellierung (2)
- Non-destructive testing (2)
- Phased array technique (2)
- Rekonstruktionsrechnung (2)
- Risse (2)
- SAFT (2)
- Spannbeton (2)
- Spannkanäle (2)
- Ultrasonic (2)
- Ultrasonic echo (2)
- Ultrasonic imaging (2)
- Ultrasound (2)
- Verpressfehler (2)
- AAM (1)
- Abdichtbauwerk (1)
- Acoustic test (1)
- Air-coupled ultrasound (1)
- Array (1)
- Asphalt (1)
- Automatisierte ZfPBau-Verfahren (1)
- Bauen im Bestand (1)
- Beton Ultraschall Monitoring (1)
- Betonbauteile (1)
- Bohrlochsonde (1)
- Brücken (1)
- Commercial acoustic devices (1)
- Concrete bridge (1)
- Concrete specimens (1)
- Crack depth (1)
- Data fusion (1)
- Dickenmessung (1)
- EFIT Modelling (1)
- Elastodynamic Finite Integration Technique (EFIT) (1)
- Elastodynamische Finite Integrationstechnik (EFIT) (1)
- Engineered Barrier System (EBS) (1)
- Engineered barrier; (1)
- Engineered barriers (1)
- Ground penetrating radar (1)
- Grouting condition (1)
- Gruppenstrahler (1)
- Hohlraumgehalt (1)
- Hüllrohr (1)
- Impact-Echo (1)
- Impact-echo (1)
- Impakt-Echo-Messverfahren (1)
- Impuls-Echo-Methode (1)
- Impuls-Radar-Messverfahren (1)
- Kosteneinsparung (1)
- LIBS (1)
- Laufzeitmessung (1)
- Leerrohre (1)
- Luftgekoppelter Ultraschall (1)
- Materials technology (1)
- Modellierung elastischer Wellen (1)
- NDT (1)
- Non-destructive testing civil engineering (1)
- Nuclear structures (1)
- Phase evaluation (1)
- Phased Array (1)
- Phased-Array-Technik (1)
- Point source synthesis (1)
- Polarimetrische Abbildungsverfahren (1)
- Post-tensioned concrete (1)
- Prestressed concrete structures (1)
- Prüfkopf (1)
- Punktquellensynthese (1)
- Quality assurance (1)
- RFID-sensors (1)
- Radarverfahren (1)
- Re-assessment of exiting bridges (1)
- Reconstruction calculation (1)
- Research needs (1)
- Risstiefenbestimmung (1)
- SHM (1)
- Schallfeld (1)
- Sohlplatte (1)
- Spannbetonbrücken (1)
- State of the art (1)
- Tendon duct (1)
- Ultraschall-Array-Messverfahren (1)
- Ultraschall-Echo-Verfahren (1)
- Ultraschall-Echoverfahren (1)
- Ultraschall-Messtechnik (1)
- Ultraschall-Rückstreuung (1)
- Ultraschallecho-Verfahren (1)
- Ultraschallprüfung (1)
- Ultraschallsender (1)
- Ultraschallverfahren (1)
- Ultrasonic Testing (1)
- Ultrasonic test (1)
- Ultrasonic testing (1)
- Ultrasound concrete (1)
- Verschlussbauwerk (1)
- Zeitlich gesteuerter Gruppenstrahler (1)
- Zerstörungsfreie Prüfung im Bauwesen (ZfPBau) (1)
- ZfPBau (1)
- bildgebende Rissdarstellung (1)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (6)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (5)
- 7 Bauwerkssicherheit (1)
- 7.4 Baustofftechnologie (1)
- 8.0 Abteilungsleitung und andere (1)
- 8.1 Sensorik, mess- und prüftechnische Verfahren (1)
- 8.4 Akustische und elektromagnetische Verfahren (1)
- 8.6 Faseroptische Sensorik (1)
- 9 Komponentensicherheit (1)
- 9.2 Versuchsanlagen und Prüftechnik (1)
Eingeladener Vortrag
- nein (5)
This paper describes an innovation of a phased array using dry contact probes to test concrete components. Based on preceding work on pressure waves, a low-frequency ultrasonic phased array consisting of shear wave probes is used in the experiments. This configuration allows the variation and control of the sound field directivity during the measurement. The measurements are carried out on a concrete test block using a scanning laservibrometer and a scanner system in transmission mode. The laboratory measurements are compared to theoretical calculations to investigate the influence of the probes shape and dimension on the resulting sound field patterns. The comparison of the modelling and the measurements demonstrates the suitability of the point source synthesis as a tool for the optimization of probe array designs. Methods of coded are used to improve the signal to noise ratio.
Cracks perpendicular to the surface may be initial indicators for a deterioration process of concrete structures. Moisture penetrates inside the structure and transports adverse chemicals. The paper presents an investigation about the reliability of available commercial non-destructive evaluation techniques to reliably estimate the depth of surface-breaking cracks in reinforced concrete structures. Aim of the study was the investigation of surface-braking cracks under laboratory conditions. Commercial acoustic devices as impact echo equipment, single ultrasonic transducers and arrays were applied even if they have not been developed for this purpose. The commercial software and descriptions for application was followed strictly to compare the function, precision and repeatability of the measurements. Both, perpendicular notches and cracks have been considered. The study was completed with a discussion about reference specimens. The study was the basis for formulation of gaps in research. The Electric Power Research Institute (EPRI) has initiated and funded a Project.
In Zeiten knapper Kassen wird überall nach Wegen gesucht Kosten einzusparen. Im Bauwesen geht es dabei um Kosteneinsparungen ohne Reduktion der Sicherheit und Dauerhaftigkeit des Bauwerks. Beim Bauen im Bestand können mit einer zerstörungsfreien Prüfung von Bauwerken die Weiternutzung oder die erforderlichen Umbauten optimiert werden und so Kosten eingespart werden.