2022 Volume 78 Issue 1 Pages 139-155
In the maintenance of road bridges, it is important to properly diagnose the soundness of PC steel materials in PC structures in order to maintain the safety and reliability of long-term maintenance of bridges. In the evaluation of the soundness of PC steel materials, it is desired to improve the efficiency and sophistication of inspections, diagnoses, and countermeasures by utilizing non-destructive inspection methods. The purpose of this research is to improve the efficiency of maintenance work by sophisticating inspection and diagnosis technology for the magnetic flux leakage method, which is an effective non-destructive inspection technology for detecting fracture due to deterioration of PC steel. A test measurement vehicle equipped with a magnetizing device using a large electromagnet and a measurement unit was manufactured, and a running measurement experiment was conducted in a test running yard using a specimen. As a result, we have developed a technology that enables detection of fracture points in PC steel by performing magnetism, magnetic flux measurement, and image analysis processing in test measurements at a speed of 50 km/hr. This paper presents useful findings for expanding the application of the magnetic flux leakage method to vehicle running measurement.
Proceedings of the JSCE Earthquake Engineering Symposium
Environmental systems research
