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Automated NDE of post-tensioned concrete bridges using radar, ultrasonic echo and impact-echo

Streicher, D. / Algernon, D. / Wöstmann, J. / Behrens, M. / Wiggenhauser, H.

Investigations at post-tensioned concrete bridges carried out with radar, impact-echo and ultrasonic echo have shown that test problems such as localisation of metallic tendon ducts and reinforcement bars as well as determination of the grouting condition in tendon ducts can be more reliably solved by taking data in two dimensional, rather dense grids (mesh width between 2 cm and 5 cm). Therefore scanning systems have been developed at BAM, which allow automated measurements with the mentioned echo test methods. In this way measurement areas up to 4 m x 10 m have been investigated at several post-tensioned concrete bridges. Special data processing methods such as 3D-reconstruction and fusion of data sets are used for a more detailed interpretation of the results. So, images of the perpendicularly arranged bars of reinforcement layers could be generated very well from fused and 3Dreconstructed radar data sets. Tendon ducts were located up to a measurement depth of approximately 55 cm.

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Automated NDE of post-tensioned concrete bridges using radar, ultrasonic echo and impact-echo

Streicher, D. / Algernon, D. / Wöstmann, J. / Behrens, M. / Wiggenhauser, H.

Investigations at post-tensioned concrete bridges carried out with radar, impact-echo and ultrasonic echo have shown that test problems such as localisation of metallic tendon ducts and reinforcement bars as well as determination of the grouting condition in tendon ducts can be more reliably solved by taking data in two dimensional, rather dense grids (mesh width between 2 cm and 5 cm). Therefore scanning systems have been developed at BAM, which allow automated measurements with the mentioned echo test methods. In this way measurement areas up to 4 m x 10 m have been investigated at several post-tensioned concrete bridges. Special data processing methods such as 3D-reconstruction and fusion of data sets are used for a more detailed interpretation of the results. So, images of the perpendicularly arranged bars of reinforcement layers could be generated very well from fused and 3Dreconstructed radar data sets. Tendon ducts were located up to a measurement depth of approximately 55 cm.

Automated NDE of post-tensioned concrete bridges using radar, ultrasonic echo and impact-echo

Streicher, D. / Algernon, D. / Wöstmann, J. / Behrens, M. / Wiggenhauser, H.

Investigations at post-tensioned concrete bridges carried out with radar, impact-echo and ultrasonic echo have shown that test problems such as localisation of metallic tendon ducts and reinforcement bars as well as determination of the grouting condition in tendon ducts can be more reliably solved by taking data in two dimensional, rather dense grids (mesh width between 2 cm and 5 cm). Therefore scanning systems have been developed at BAM, which allow automated measurements with the mentioned echo test methods. In this way measurement areas up to 4 m x 10 m have been investigated at several post-tensioned concrete bridges. Special data processing methods such as 3D-reconstruction and fusion of data sets are used for a more detailed interpretation of the results. So, images of the perpendicularly arranged bars of reinforcement layers could be generated very well from fused and 3Dreconstructed radar data sets. Tendon ducts were located up to a measurement depth of approximately 55 cm.

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Title:

Automated NDE of post-tensioned concrete bridges using radar, ultrasonic echo and impact-echo

Additional title:

Automatische ZfP von nachgespannten Betonbrücken mittels Radar, Ultraschallecho und Impaktecho

Contributors:

Streicher, D. (author) / Algernon, D. (author) / Wöstmann, J. (author) / Behrens, M. (author) / Wiggenhauser, H. (author)

Published in:

NDE Conference on Civil Engineering, Structural Materials Technology: NDE/NDT for Highways and Bridges, 7, NDE Conference on Civil Engineering, NDT-CE, Nondestructive Testing in Civil Engineering, International Symposium, 6 ; 439-444

Publication date:

2006

Size:

6 Seiten, 5 Bilder, 6 Quellen

ISBN:

Type of media:

Conference paper

Type of material:

Storage medium

Language:

English

Keywords:

zerstörungsfreie Prüfung , diverse Verfahren , Radarabbildung , Ultraschallprüfung , Impulsechoverfahren , Schlagprüfung , Beton , Brücke (Bauwerk)

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