Multi-step inverse analysis for rebar corrosion using genetic algorithm and boundary element method

作     者：Minagawa, Koichi Hayabusa, Keisuke Suga, Kazuhiro Ridha, M. Amaya, Kenji Aoki, Shigeru 

作者机构：Intelligent Material and Mechanics System Toyo University 2100 Kujirai Kawagoe 350-8585 Japan Ebara Research. Co. LTD. 4-2-1 HonfuJisawa Fujisawa 251-0875 Japan CCMR Toyo University 2-36-5 Hakusan Bunkyoku Tokyo 112-0001 Japan Department of Mechanical and Environmental Informatics Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan Department of Computational Engineering and Science Toyo University 2100 Kujirai Kawagoe 350-8585 Japan 

出 版 物：《Zairyo to Kankyo/ Corrosion Engineering》 (Zairyo Kankyo)

年 卷 期：2008年第57卷第6期

页      面：282-287页

核心收录：

主　　题：Boundary element method 

摘      要：This research proposes an effective inverse analysis technique for solving an inverse problem to detect corrosion in reinforced concrete non-destructively from potentials on a concrete surface. The technique can detect the number, the shape and the location of corrosion without particular assumption with GA (genetic algorithm), and increases accuracy of solution gradually if necessary. The following three strategies achieve the proposed technique: (1) Control of analysis precision, i.e. coarseness of BEM (boundary element method) meshes, depending on required precision of solution. (2) Use of the net elements for BEM for decreasing the number of elements for steels. (3) Analysis with higher precision only within detected corrosion area on lower precise analysis. We performed a numerical simulation to solve an inverse problem for detecting steel corrosion in concrete with the proposed technique. The result showed that the proposed method could detect corrosion with high accuracy. The calculation time of the proposed method was about 1/100 in comparison with that of the previously proposed method.