A FUNDAMENTAL CONSIDERATION OF DEFECT EVALUATION OF CONCRETE STRUCTURES USING INFRARED THERMOGRAPHY

  • Tatsuro Watanabe Kyushu University, Japan
  • Yoshimi Sonoda Kyushu University, Japan

Abstract

In recent years, various non-destructive methods are intensively researched due to the increasing risk of failure accident of a large number of existing reinforced concrete structures. In those nondestructive tests, there is a very effective method called the thermal infrared image that could measure a target object from a
distance. Infrared thermography applies the difference of the thermal conductivity of the healthy part and the defect part and it could clearly (visually) distinguish the defect domain by a temperature distribution of surface concrete. However, the temperature of surface concrete is strongly affected by not only defective conditions  but  also  environmental  conditions  such  as  surrounding  temperature  and  solar  insolation condition. Thus, it is not easy to evaluate the defective condition from the infrared thermography data. From these reasons, we conducted a fundamental research on the evaluation of defective condition using infrared thermography data and numerical analysis approach by finite element method under the same condition. In addition, the analysis results and experimental values were compared, and validated the efficiency of FE analysis. Furthermore, heat transfer analyses of surface concrete in the four seasons have
performed in order to clarify a suitable period of time for the infrared thermography.

Published
2011-08-01
How to Cite
WATANABE, Tatsuro; SONODA, Yoshimi. A FUNDAMENTAL CONSIDERATION OF DEFECT EVALUATION OF CONCRETE STRUCTURES USING INFRARED THERMOGRAPHY. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 072, aug. 2011. Available at: <http://proceeding.eacef.com/ojs/index.php/EACEF/article/view/403>. Date accessed: 19 may 2024.
Section
Group of Structural and Construction Engineering