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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.24 No.3
- 발행연도
- 2017.1
- 수록면
- 323 - 337 (15page)
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초록· 키워드
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This paper presents the results of a comprehensive experimental investigation on the compressive behaviour of steel tube-confined concrete (STCC) stub columns with active and passive confinement. To create active confinement in STCC columns, an innovative technique is used in which steel tube is laterally pre-tensioned while the concrete core is simultaneously pre-compressed by applying pressure on fresh concrete. A total of 135 STCC specimens with active and passive confinement are tested under axial compression load and their compressive strength, ultimate strain capacity, axial and lateral stress.strain curves and failure mode are evaluated. The test variables include concrete compressive strength, outer diameter to wall thickness ratio of steel tube and prestressing level. It is shown that applying active confinement on STCC specimens can considerably improve their mechanical properties. However, applying higher prestressing levels and keeping the applied pressure for a long time do not considerably affect the mechanical properties of actively confined specimens. Based on the results of this study, new empirical equations are proposed to estimate the axial strength and ultimate strain capacity of STCC stub columns with active and passive confinement.
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참고문헌 (31)
참고문헌 신청
2008 / ACI Committee 211.1-91, Standard practice for selecting proportions for normal, heavyweight, and mass concrete; ACI manual of concrete practice, Part 1 / American Concrete Institute
Andrawes, B. / 2010 / Active confinement of reinforced concrete bridge columns using shape memory alloys / J. Bridge Eng 15(1):81~89
2003 / ASTM A370, Standard test methods and definitions for mechanical testing of steel products / Annual Book of ASTM Standard 01
Binici, B. / 2005 / An analytical model for stress–strain behavior of confined concrete / Eng. Struct 27(7):1040~1051
Chang, X. / 2009 / Mechanical performance of eccentrically loaded pre-stressing concrete filled circular steel tube columns by means of expansive cement / Eng. Struct 31(11):2588~2597
Andrawes, B. / 2010 / Active confinement of reinforced concrete bridge columns using shape memory alloys / J. Bridge Eng 15(1):81~89
2003 / ASTM A370, Standard test methods and definitions for mechanical testing of steel products / Annual Book of ASTM Standard 01
Binici, B. / 2005 / An analytical model for stress–strain behavior of confined concrete / Eng. Struct 27(7):1040~1051
Chang, X. / 2009 / Mechanical performance of eccentrically loaded pre-stressing concrete filled circular steel tube columns by means of expansive cement / Eng. Struct 31(11):2588~2597
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