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Computers and Concrete
  Volume 7, Number 1, February 2010, pages 63-81

Shape determination of 3-D reinforcement corrosion in concrete based on observed temperature on concrete surface
Takahiko Kurahashi and Hideki Oshita

Abstract     [Full Text]
    We present the shape determination method of 3-D reinforcement corrosion based on observed temperature on concrete surface. The non-destructive testing for reinforcement corrosion in concrete using a heat image on concrete surface have been proposed by Oshita. The position of the reinforcement of corrosion or the cavity can be found using that method. However, the size of those defects can not be precisely measured based on the heat image. We therefore proposed the numerical determination system of the shape for the reinforcement corrosion using the observed temperature on the concrete surface. The adjoint variable method is introduced to formulate the shape determination problem, and the finite element method is employed to simulate the heat transfer problem. Some numerical experiments and the examination for the number of the observation points are shown in this paper.
Key Words
    reinforcement corrosion; observed temperature on concrete surface; shape determination problem; adjoint variable method; finite element method.
Takahiko Kurahashi: Dept. of Mechanical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka-shi, Niigata, 940-2188, Japan
Hideki Oshita: Dept. of Civil Engineering, Chuo University, 1-13-27 Kasuga, Bunkyou-ku, Tokyo, 112-8551, Japan

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