K-0321 Identification of Corrosion Using Electromagnetism

概要

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An inverse analysis method was developed for identifying a small corrosion of a rebar in concrete structure. In this method, Location of the corrosion was estimated from some magnetic flux densities instead of potentials which were measured on the structure. The BEM was employed to solve the Laplace equation which models the potentials in the structure. The corrosion current associated with a magnetic field is well known. The use of magnetic flux density measurement could improve the accuracy of the inverse analysis method, because a very low magnetic flux intensities could be detected by employing the SQUID sensor which has a very high magnetic field sensitivity. An example using a numerical simulation data was used to demonstrate the effectiveness of the proposed method.
社団法人日本機械学会の論文
2001-08-22