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고온을 받은 철근콘크리트 부재의 색 변화도 정량화 방법에 관한 연구

Study on the Method to Quantify the Color Changes of Reinforced Concrete Member subjected to High Temperatures

  • 투고 : 2014.10.02
  • 심사 : 2014.12.03
  • 발행 : 2014.12.30

초록

Although concrete structures suffer from damage due to high temperatures such as fire, it is possible to repair and strengthen after fire considering economic interests. To assess the remaining bearing capacity of the structural elements after high temperatures, information of the temperatures reached inside the elements is very important. The assessment of the temperatures reached inside concrete during a fire by means of its color changes has been studied using the method of spectrophotometer or digital image analysis. The purpose of this study is to quantify changes in color for reinforced concrete member including columns and beams using digital image analysis and to identify the relationship between color changes and increasing temperatures. In this paper new approach is performed to the research field of assessment of concrete structures after fire by means of colorimetry. The color measurement of digital images in reinforced concrete columns and beams exposed to $300^{\circ}C$, $500^{\circ}C$, and $700^{\circ}C$ is executed according to RGB, HSB, and Lab color space with Photoshop Software and the trend of each color value is analyzed in different temperatures. The result of this study shows that color changes of reinforced concrete member with increasing high temperatures not only a shift to red is considered, but also the development of a color path. Therefore, this color development can be related to the increasing temperature and can be used to assess the fire damage of concrete structures.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

참고문헌

  1. 박연선, 색채용어사전, 도서출판 예림, 2007.
  2. 한국콘크리트학회, 철근콘크리트 구조물의 내화특성, 2005.
  3. 이재용 외, CIE Lab 표색계를 적용한 무기안료가 착색시멘트모르터의 색에 미치는 영향 분석, 대한건축학회논문집 19 권 11호, 2003.
  4. 장재봉 외, 초음파속도법을 이용한 화재피해를 입은 콘크리트의 수열온도 평가에 관한 실험적 연구, 한국화재소방학회 하계학술논문발표회, 2004.
  5. Deng-Fong Lin, Her-Yung Wang, and Huan-Lin Luo, Assessment of fire-damaged mortar using digital image process. Journal of materials in civil engineering, 16(4), 2004.
  6. E. Annerel, L. Taerwe, Methods to quantify the color development of concrete exposed to fire, Construction and building materials, 2011.
  7. Matteo Colombo, Roberto Felicetti, New NDT techniques for the assessment of fire-damaged concrete structures, Fire Safety Journal, 2007.
  8. N. R. Short, J. A. Purkiss, and S. E. Guise, Assessment of fire damaged concrete using color image analysis, Construction and building materials, 2001.
  9. Nabi Yuzer, Fevziye Akoz, and Leyla Dokuzer Ozturk, Compressive strength-color change relation in mortars at high temperature, Cement and Concrete Research, 2004.
  10. Adobe, Adobe Photoshop CS6 Help and Tutorials, 2013.
  11. Konica Minolta, Precise color communication, 2004.