DOI QR코드

DOI QR Code

변전소 철골 내화뿜칠 부착강도 기준설정에 관한 실험적 연구

The Experimental Study on the Suggestion for Bond Strength Standard of Sprayed Fire Resistive Materials Used at the Substation Steel Structures

  • 박동수 (한국전력공사 전력연구원) ;
  • 정원섭 (한국전력공사 전력연구원)
  • 투고 : 2013.05.31
  • 심사 : 2013.12.09
  • 발행 : 2014.01.30

초록

내화뿜칠재는 주로 철골구조물 위에 시공하여 내화구조기준을 만족하기 위한 것이다. 국내에서는 원자력발전소를 비롯하여 철골구조물에 내화뿜칠재를 시공하여 왔지만, 재료특성 중 중요한 요건인 부착강도기준이 제정되어있지 않았다. 다만, 원자력발전소는 원전의 기준에 따라 부착강도 기준이 있었다. 본 논문에서는 변전소에 시공되는 내화뿜칠재의 부착강도 기준을 정하고자 하였다. 기준설정 방법은 현재 사용되는 제품으로 실험체를 제작하고, 변전소 환경에 따라 열화시키며 부착강도를 측정하고 구조물 내구연한 기간 동안 열화시킨 후 변전소에서 발생하는 충격하중 실험을 통하여 탈락여부를 평가하여 부착강도기준을 설정하였다. 본 논문에서의 부착강도는 시중에서 사용되는 제품을 기준으로 실험한 것으로 최소한의 값이라고 판단된다.

Sprayed fire resistive materials are mainly used at steel structures to satisfy fireproof construction standard. However, the regulations on bond strength have been not considered with the exception of structures in the nuclear power plants, although it is an important factor showing material properties. Therefore, this paper suggested guidelines for bond strength of sprayed fire resistive materials used in the substation, by measuring bond strength according to aging of structures and impact loading considering environment of substations. It is judged that the bond strength suggested in this paper is the minimum value because it was measured from specimens widely used.

키워드

참고문헌

  1. ASTM International (2010), Standard Test Methods for Determining Effects of Large Hydrocarbon Pool Fires on Structural Members and Assemblies.
  2. BSI, BS 8202-2 (1992), Coatings for fire protection of building elements, -part 2: Code of practice for the use of intumescent coating systems to metallic substrates for providing fire resistance.
  3. KEPCO (1995), Nuclear Power Plant Construction Specipication CP-A2.
  4. Kim, G. S., Lee, H. J. (2010), A Report of Field Measurement for Dynamic Characteristics of 154kV Steel Frame Substation, KEPRI Report.
  5. Kim, J. Y., Song, E. J., Kim, T. H. (2012), An Analysis of Service Life for Wasting Asset in Major Countries (Tax law Report 12-06), Korea Institute of Public Finance, 21.
  6. KS F 2901 (2008), Test methods for thickness and density of sprayed fire resistive material applied to structural members.
  7. KS F 2902 (2008), Test methods for bond strength of sprayed fire resistive material applied to structural members.
  8. Lee, J. C. (2006), The Fire Resistance of the Sprayed Fire Resistive Materials with Gypsum and Vermiculite aged in the Different Temperature and Humidity Conditions, Journal of Architectural Institute of Korea, Structural part, 109-116.
  9. Park, D. S. (2010), Development a Technology of Maintenance for Waterproofing System in Substation, KEPRI Report, 104-108.
  10. www.kma.go.kr (1981-2010), Korea Meteorological Administration, Korea climate table.