This study develops numerical model of mega composite columns in fire and investigates the residual areas using 500℃ isotherm method and residual capacity of mega composite columns after 3 hours. In order to perform heat transfer analysis, thermal properties of steels and concrete were adopted from Eurocodes. In addition to, the temperature distributions of composite columns with respect to fire tests were compared with numerical analysis results. As a result, residual capacity of mega composite column with 1m width remained more than 45%. The residual capacity of mega composite column was only increased to 2.3∼2.6% with the use of additional rebars.

1. 서 론
 2. 연구동향
  2.1 기둥의 내화성능 평가기준
  2.2 콘크리트충전 합성기둥 내화성능 연구
 3. 열전달 해석모델 검증
 4. 잔존내력 분석을 위한 열전달해석
  4.1 열전달해석 계획
  4.2 해석 결과
  4.3 화재시 잔존내력
  4.4 철근의 영향
 5. 결 론
 REFERENCES

• 민정기(한국건설생활환경시험연구원 방재기술평가센터 선임연구원, Senior Researcher, Fire & Safety Evaluation Technology Center, Korea Conformity Laboratories, Korea) | Min, Jeong-Ki Corresponding author
• 염경수(㈜액트파트너 소장, Head, Act Partner, Korea) | Yom, Kyong-Soo
• 최성모(서울시립대학교 건축공학과 교수, Professor, Department of Architectural Engineering, University of Seoul, Korea) | Choi, Sung-Mo