A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fast NDT localisation of prestressing steel fractures in post-tensioned concrete bridges
In prestressed bridge decks and parking structures, fractures of prestressing steel wires are common. In most cases, the reason for the fracture is chloride-induced corrosion. Application of the RM-Method to detect potential prestressing steel fracture has been increased the measurement speed by magnetizing the tendons in one step using a larger mobile magnet and by scanning the magnetic flux density over the entire surface of the bridge deck. The feasibility of rapid magnetization of tendons using an appropriate electromagnetic yoke was shown in laboratory tests. A vehicle to drive the measurement devices has been developed. With this, a fast procedure for locating prestressing steel fractures in transverse tendons of bridge decks or tendons in other plane structures, such as parking decks, has become available. The measuring speed will be increased by several magnitudes. As a result, structural testing of the prestressing steel, required to maintain structural safety, could be performed without severe disruption of traffic.
Fast NDT localisation of prestressing steel fractures in post-tensioned concrete bridges
In prestressed bridge decks and parking structures, fractures of prestressing steel wires are common. In most cases, the reason for the fracture is chloride-induced corrosion. Application of the RM-Method to detect potential prestressing steel fracture has been increased the measurement speed by magnetizing the tendons in one step using a larger mobile magnet and by scanning the magnetic flux density over the entire surface of the bridge deck. The feasibility of rapid magnetization of tendons using an appropriate electromagnetic yoke was shown in laboratory tests. A vehicle to drive the measurement devices has been developed. With this, a fast procedure for locating prestressing steel fractures in transverse tendons of bridge decks or tendons in other plane structures, such as parking decks, has become available. The measuring speed will be increased by several magnitudes. As a result, structural testing of the prestressing steel, required to maintain structural safety, could be performed without severe disruption of traffic.
Fast NDT localisation of prestressing steel fractures in post-tensioned concrete bridges
Schnelle zerstörungsfreie Bruchortung an vorgespanntem Stahl in nachgespannten Betonbrücken
Walther, Andrei (author) / Hillemeier, Bernd (author)
2008
11 Seiten, 9 Bilder, 10 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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