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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.33 No.6
- 발행연도
- 2019.1
- 수록면
- 849 - 864 (16page)
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초록· 키워드
오류제보하기
One way to achieve sustainable construction is to reduce concrete consumption by use of more sustainable and higher strength concrete. Modern building codes do not cover the use of ultra-high strength concrete (UHSC) in the design of composite structures. Against such background, this paper investigates experimentally the mechanical properties of steel fibre-reinforced UHSC and then the structural behaviors of UHSC encased steel (CES) members under both concentric and eccentric compressions as well as pure bending. The effects of steel-fibre dosage and spacing of stirrups were studied, and the applicability of Eurocode 4 design approach was checked. The test results revealed that the strength of steel stirrups could not be fully utilized to provide confinement to the UHSC. The bond strength between UHSC and steel section was improved by adding the steel fibres into the UHSC. Reducing the spacing of stirrups or increasing the dosage of steel fibres was beneficial to prevent premature spalling of the concrete cover thus mobilize the steel section strength to achieve higher compressive capacity. Closer spacing of stirrups and adding 0.5% steel fibres in UHSC enhanced the post-peak ductility of CES columns. It is concluded that the code-specified reduction factors applied to the concrete strength and moment resistance can account for the loss of load capacity due to the premature spalling of concrete cover and partial yielding of the encased steel section.
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참고문헌 (46)
참고문헌 신청
2008 / ACI 318-08, Building code requirements for structural concrete and commentary / American Concrete Institute
AIJ / 2001 / Standard for structural calculation of steel reinforced concrete structures / Architectural Institute of Japan
Begum, M. / 2013 / Behaviour of partially encased composite columns with high strength concrete / Eng. Struct 56:1718~1727
2016 / ANSI/AISC 360, Specification for Structural Steel Buildings / American Institute of Steel Construction
2018 / ASTM C39/C39M, Standard test method for compressive strength of cylindrical concrete specimens / ASTM International
AIJ / 2001 / Standard for structural calculation of steel reinforced concrete structures / Architectural Institute of Japan
Begum, M. / 2013 / Behaviour of partially encased composite columns with high strength concrete / Eng. Struct 56:1718~1727
2016 / ANSI/AISC 360, Specification for Structural Steel Buildings / American Institute of Steel Construction
2018 / ASTM C39/C39M, Standard test method for compressive strength of cylindrical concrete specimens / ASTM International
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