횡구속 방법에 따른 고성능 RC 기둥 콘크리트의 내화특성

Properties of Fire Endurance of High Performance RC Column with Laterral Confinement Method

  • 황인성 (청주대학교 산업과학연구소) ;
  • 김기훈 (청주대학교 대학원) ;
  • 배연기 (두산산업개발(주) RC연구개발팀) ;
  • 이보형 (두산산업개발(주) 기술연구소) ;
  • 이재삼 (두산산업개발(주) RC연구개발팀) ;
  • 한천구 (청주대학교 건축공학부)
  • 발행 : 2004.11.01

초록

This paper is to investigate the spalling and fire endurance of high performance RC column member with PP fiber and lateral confinement of metal lath and non fire resistance removal type form. According to test results, combination of PP fiber and metal lath as well as use fire resistance non removal type form had favorable fire resistance by discharging internal vapour pressure and lateral confining. After fire endurance test, compressive strength decreased markedly caused by internal expansion pressure and crack. Residual strength of plain concrete was decreased to $22\%$. The use of PP fiber and lateral confinement of metal lath and non removal type form enhanced the residual strength above $40\%$. Especially, the combination of $0.1\%$ of PP fiber and lateral confinement with the level of 2.3T exhibited more than $51\%$ of residual strength. Therefore, to improve fire endurance and spalling resistance, the combination of $0.1\%$ of PP fiber and metal lath with 2.3T can be the proper measure.

키워드