Inspection of Prestressed Concrete Structural Members with Magnetic Methods

被引：0
|
作者：
Sawade, Gottfried [1 ]
Krause, Hans-Joachim [2 ]
机构：
[1] Univ Stuttgart, MPA Otto Graf Inst, D-70569 Stuttgart, Germany
[2] Forschungszentrum Julich, Inst Bio & Nanosyst IBN 2, D-52425 Julich, Germany
来源：
BETON- UND STAHLBETONBAU | 2010年 / 105卷 / 03期
关键词：
D O I：
10.1002/best.200900075
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Inspection of Prestressed Concrete Structural Members with Magnetic Methods The methods of magnetic stray field measurement and of magnetic remanence measurment are well suited for nondestructive detection of ruptures in prestressing wires of concrete structural members. Using a yoke magnet with integrated magnetic field sensors, the members are scanned several times with varying magnetization field strength. The signal analysis is based on the comparison of measurements after different premagnetizations as well as on the determination of the correlation with idealized rebar and crack signals. The limits of detection are discussed on a case-by-case basis. The application in inspection practice is illustrated with three examples.
引用
收藏
页码：154 / 164
页数：11
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