Advanced SearchSearch Tips
Practical Predictive Formulas for Residual Strengths of Fire-Damaged Normal Strength Reinforced Concrete Square Columns
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Practical Predictive Formulas for Residual Strengths of Fire-Damaged Normal Strength Reinforced Concrete Square Columns
Lee, Cha-Don; Lee, Seung-Whan; Lee, Chang-Eun;
  PDF(new window)
The behavior of concrete structures subject to fire is complex, depending on many factors. The factors usually considered in research include the level and endurance of temperatures in concrete and reinforcing bars, the mechanical properties of the steel and concrete, moisture contents, cover thickness, existence of eccentricity, and member geometry among others. Although there are a few sophisticated numerical models which can trace the effects of these important parameters on the residual capacity of reinforced concrete columns damaged by fire, practical predictive formulas are in need for rapid yet reasonable assessment in practice. The practical formulas are developed in this study for fire-damaged normal strength reinforced concrete square columns, which can approximate the predictions of those sophisticated numerical models with ease in use. The formulas take into account the effects of exposure time to fire, concrete strength, reinforcement ratio and sectional area. The developed formulas are seen to correlate with the predictions of numerical model in a reasonable agreement. Some examples are also presented in determining the residual strength, safety and additionally needed strengths for a fire-damaged reinforced concrete column.
fire;normal strength;predictive formulas;reinforced concrete column;residual capacity;
 Cited by
하이브리드 섬유보강 고강도콘크리트 기둥부재의 내화성능,원종필;장창일;이상우;김흥열;김완영;

한국콘크리트학회논문집, 2008. vol.20. 6, pp.827-832 crossref(new window)
폴리프로필렌섬유 혼입률에 따른 고강도콘크리트 기둥부재의 폭렬 및 내부온도 분포특성,원종필;장창일;;김흥열;김완영;

한국콘크리트학회논문집, 2008. vol.20. 6, pp.821-826 crossref(new window)
하이브리드 섬유 보강 고강도 콘크리트 기둥의 내화성능,김정훈;신용석;문금환;박춘걸;김정섭;

대한건축학회논문집:구조계, 2011. vol.27. 5, pp.85-92
건설교통부, '건축제법규' 건축물의 피난 . 방화구조 등의 기준에 관한 규칙 제3조, 건교부고시 제 2000-93호

김진근 외 5명, '콘크리트의 열전도율에 관한 실험적 연구' 콘크리트학회논문집, 10권 2호, 1998, pp.946-951

Harmathy, T. Z., 'Thermal Properties of Concrete at Elevated Temperature', Journal of Material, JMLSA, Vol.5, No.1, March 1970, pp.47-74

Harmathy, T. Z., 'Effect of Moisture on the fire endurance of Building elements', In Moisture in Material in Relation to Fire Test, ASTM STP 385, American Society for Testing and Materials, Philadelphia PA, 1965, 74pp,(Chaps 4, 13)

Harmathy, T. Z., Fire Safety Design and Concrete, Longman Scientific & Technical, 1993

강석원, 'Numerical Analysis of Reinforced Concrete Column and Beam at High Temperature', 서울대학교 대학원, 건축학과, 2001. 2

허은진, '철근콘크리트 휨 부재의 내력성능에 관한 해석적 연구', 부산대학교 석사학위 논문, 2001

이승환, '화해를 입은 실물크기 일반강도 철근 콘크리트 기둥의 구조거동', 중앙대학교 대학원, 건축공학과, 2003. 2

ISO, Fire Resistance Tests-Elements of Building Construction, ISO 834-1975, International Organization for Standardization, 1975

Nisigakitarou 外5人., '高溫時 におけるコンクリ -トの力學的特性のモデル化', 日本建築學會大會學術구講演梗概集, 1995. 8, pp.71-72

Lie, T. T, Lin, T D., Allen, 0. E, and Abrams, M. S., Fire Resistance of Reinforced Concrete Columns, National Research Council Canada Division of Building Research, Ottawa, 1984