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A platform for research: civil engineering, architecture and urbanism
Assessment of post tensioned box girder bridges applying automated non-destructive testing methods. Investigation on two box girder bridges of the highway A23-Süd-Ost-Tangente in Vienna with radar, ultrasonic echo and impact-echo
Non-destructive testing (NDT) allows reducing of destructive testing and extends the possibilities for the assessment of concrete bridges. During the past years NDT methods in civil engineering have experienced broader public awareness and their performance was strongly improved. In this contribution results gained during the investigation of the inner structure of posttensioned box girder webs with impulse radar, ultrasonic echo and impact-echo will be presented. Two-dimensional measurements with these three NDT methods were carried out at two highway bridges in Vienna. A scanning system, developed at BAM (Federal Institute for Materials Research and Testing), was used at large areas and allowed automated data acquisition. The main objectives were the demonstration of the performance of radar, impact-echo and ultrasonic echo methods in automated measurements and the application of new tools for data processing and data visualization. By the combined application of the acoustic and electromagnetic impulse-echo methods tendon ducts could be localized at measurement depths up to 40 cm. The reinforcement on the outer side of the webs could be clearly visualized. Information about the position of tendon duct couplings and hints to ranges of incomplete grouted tendon ducts can be given. The investigations have also shown that further research is still necessary concerning the detection of grouting faults with the acoustic methods.
Assessment of post tensioned box girder bridges applying automated non-destructive testing methods. Investigation on two box girder bridges of the highway A23-Süd-Ost-Tangente in Vienna with radar, ultrasonic echo and impact-echo
Non-destructive testing (NDT) allows reducing of destructive testing and extends the possibilities for the assessment of concrete bridges. During the past years NDT methods in civil engineering have experienced broader public awareness and their performance was strongly improved. In this contribution results gained during the investigation of the inner structure of posttensioned box girder webs with impulse radar, ultrasonic echo and impact-echo will be presented. Two-dimensional measurements with these three NDT methods were carried out at two highway bridges in Vienna. A scanning system, developed at BAM (Federal Institute for Materials Research and Testing), was used at large areas and allowed automated data acquisition. The main objectives were the demonstration of the performance of radar, impact-echo and ultrasonic echo methods in automated measurements and the application of new tools for data processing and data visualization. By the combined application of the acoustic and electromagnetic impulse-echo methods tendon ducts could be localized at measurement depths up to 40 cm. The reinforcement on the outer side of the webs could be clearly visualized. Information about the position of tendon duct couplings and hints to ranges of incomplete grouted tendon ducts can be given. The investigations have also shown that further research is still necessary concerning the detection of grouting faults with the acoustic methods.
Assessment of post tensioned box girder bridges applying automated non-destructive testing methods. Investigation on two box girder bridges of the highway A23-Süd-Ost-Tangente in Vienna with radar, ultrasonic echo and impact-echo
Bewertung von nachgespannten Kastenträgerbrücken mittels automatisierter zerstörungsfreier Testmethoden. Untersuchung an zwei Kastenträgerbrücken der Autobahn A23-Süd-Ost-Tangente in Wien mit Radar, Ultraschallecho und Impakt-Echo
Streicher, D. (author) / Kohl, C. (author) / Wiggenhauser, H. (author) / Petz, J. (author)
2006
13 Seiten, 10 Bilder, 12 Quellen
Conference paper
Storage medium
English
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