A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Magnetoelastic stress measurement and material defect detection in prestressed tendons using coil sensors
Apart from the general state of the tendon the quantity of the stress in the prestressed steel is of prime importance for the safety assessment of prestressed structures and/or anchor systems. On account of precaution reasons it was necessary to create a reliable, sturdy and competitive measuring device for the direct stress monitoring in prestressing steel elements being used in sensitive infrastructure buildings and other building structures subjected to high demands as e. g. bridges. Within the framework of the Collaborative Research Center (CRC) 477 at the Technical University of Braunschweig the magnetoelastic method has been used for the stress measurement in prestressed trial members as well as in experimental and real structures. Extensive investigations showed the suitability, long-term performance and stability of the measuring principle. Magnetoelastic coil sensors in various sizes fit to different types of prestressed steel were developed. Up to now, magnetoelastic coil sensors were applied in several motorway bridges, at ground anchors and at the trial bridge 'Concerto' as well as at prestressed masonry wall elements to supervise the stress in the tendons over a longer time span. Further investigations using coil sensors to detect material defects and corrosion will be discussed and explained as well.
Magnetoelastic stress measurement and material defect detection in prestressed tendons using coil sensors
Apart from the general state of the tendon the quantity of the stress in the prestressed steel is of prime importance for the safety assessment of prestressed structures and/or anchor systems. On account of precaution reasons it was necessary to create a reliable, sturdy and competitive measuring device for the direct stress monitoring in prestressing steel elements being used in sensitive infrastructure buildings and other building structures subjected to high demands as e. g. bridges. Within the framework of the Collaborative Research Center (CRC) 477 at the Technical University of Braunschweig the magnetoelastic method has been used for the stress measurement in prestressed trial members as well as in experimental and real structures. Extensive investigations showed the suitability, long-term performance and stability of the measuring principle. Magnetoelastic coil sensors in various sizes fit to different types of prestressed steel were developed. Up to now, magnetoelastic coil sensors were applied in several motorway bridges, at ground anchors and at the trial bridge 'Concerto' as well as at prestressed masonry wall elements to supervise the stress in the tendons over a longer time span. Further investigations using coil sensors to detect material defects and corrosion will be discussed and explained as well.
Magnetoelastic stress measurement and material defect detection in prestressed tendons using coil sensors
Magnetostriktive Spannungsmessung und Nachweis von Materialfehlern in vorgespannten Spanngliedern mittels Spulensensoren
Wichmann, Hans-Joachim (author) / Holst, Alexander (author) / Budelmann, Harald (author)
2009
6 Seiten, 15 Bilder, 2 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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