In this study, uniaxial compression tests were performed to investigates the stress-strain relations of Double Skinned Composite Tubular Columns reinforced with steel tube. The confined concrete has been known as the strength of concrete increases significantly. Specimens reinforced with outer and inner steel tube were tested by uniaxial compression test. To investigate the influence of concrete strength increase by confining conditions in steel tubes, 8 specimens with different thickness of tube, hollowness ratio and concrete strength were tested and compared with other researcher's concrete material model.

1. 서 론
2. 배경 이론
3. 실험 개요
4. 실험 결과 및 분석
5. 결 론
ACKNOWLEDGMENT
References

• 이정화(고려대학교 건축사회환경공학부 박사과정) | Lee, Jeong-Hwa
• 한상윤(고려대학교 초고층초장대교량기술연구소 연구교수) | Han, Sang-Yun
• 원덕희(한국해양과학기술원 연안개발에너지연구부 연수 연구원) | Won, Deok-Hee
• 강영종(고려대학교 건축사회환경공학부 교수) | Kang, Young-Jong Corresponding author