철계-형상기억합금 나선철근으로 횡 구속된 콘크리트 기둥의 압축파괴에너지 기반 응력-변형률 모델
(주)코리아스칼라
- 최초 등록일
- 2024.01.15
- 최종 저작일
- 2023.12
- 9페이지/ 어도비 PDF
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서지정보
ㆍ발행기관 : 한국복합신소재구조학회
ㆍ수록지정보 : 복합신소재구조학회 논문집 / 14권 / 6호
ㆍ저자명 : 지상원, 홍기남
목차
1. 서 론
2. 일축 압축실험
2.1 실험체 개요
2.2 사용 재료
2.3 실험 방법
3. 실험 결과
3.1 국소파괴영역길이
3.2 압축파괴에너지
4. 응력-변형률 모델
4.1 유효 횡 구속응력
4.2 최대 응력 및 최대 응력 시 변형률
4.3 국소파괴영역길이 및 압축파괴에너지 정식화
4.4 응력-변형률 모델 제안
4.5 제안 모델 검증
5. 결 론
감사의 글
REFERENCES
영어 초록
This study reports an experimental and analytical exploration of concrete columns laterally confined with Fe-based shape-memory alloy (Fe-SMA) spirals. For performing experiments, Fe-SMA rebars with a 4% prestrain and diameter of 10 mm were fabricated and concrete columns with internal Fe-SMA spiral reinforcement were constructed with a diameter of 200 mm and height of 600 mm. An acrylic bar with an attached strain gauge was embedded in the center of the specimen to measure local strains. Experimental variables encompassed the Fe-SMA spiral reinforcement, spacing, and activation temperature. Uniaxial compression tests were conducted after applying active confinement to the concrete columns through electrical-resistance heating. Notably, as the Fe-SMA spiral spacing decreased, the local failure zone length and compressive fracture energy of the prepared specimens increased. Additionally, a model incorporating compressive fracture energy was proposed to predict the stress–strain behavior of the. This model, accounting for active and passive confinement effects, demonstrated accurate predictions for the experimental results of this study as well as for previously reported results.
참고 자료
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