[1360] BASIC INVESTIGATION ON CORROSION DETECTION OF PRESTRESSING STEEL BARS BASED ON MAGNETIC FLUX LEAKAGE METHOD
キーワード：Magnetic flux leakage, prestressing steel bar, corrosion, NDT, FEM analysis, 漏洩磁束, PC鋼材, 腐食, 非破壊検査, FEM 解析
The paper presents the methodology for detection of corrosion damage of prestressing steel bars in post-tensioned prestressed concrete structures. The proposed methodology pertains to non-destructive testing methods based on magnetic flux leakage. The results demonstrated that the methodology allows to detect loss of cross-section of prestressing steel bars due to corrosion, establish location of the damaged site and approximately evaluate its degree. The results of the experiments conform to the results of simulation carried out using Finite Element Method.