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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.34 No.1
- 발행연도
- 2020.1
- 수록면
- 123 - 139 (17page)
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초록· 키워드
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The tube outward local buckling of Concrete-Filled Steel Tube (CFST) beam under high compression stress is still considered a critical problem, especially for steel tubes with a slender section compared to semi-compact and compact sections. In this study, the flexural performance of stiffened slender cold-formed square tube beams filled with normal concrete was investigated. Fourteen (14) simply supported CFST specimens were tested under static bending loads, stiffened with different shapes and numbers of steel stiffeners that were provided at the inner sides of the tubes. Additional finite element (FE) CFST models were developed to further investigate the influence of using internal stiffeners with varied thickness. The results of tests and FE analyses indicated that the onset of local buckling, that occurs at the top half of the stiffened CFST beam’s cross-section at mid-span was substantially restricted to a smaller region. Generally, it was also observed that, due to increased steel area provided by the stiffeners, the bending capacity, flexural stiffness and energy absorption index of the stiffened beams were significantly improved. The average bending capacity and the initial flexural stiffness of the stiffened specimens for the various shapes, single stiffener situations have increased of about 25% and 39%, respectively. These improvements went up to 45% and 60%, for the double stiffeners situations. Moreover, the bending capacity and the flexural stiffness values obtained from the experimental tests and FE analyses validated well with the values computed from equations of the existing standards.
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참고문헌 (55)
참고문헌 신청
Suliman Abdalla / 2013 / Behavior of CFSTs and CCFSTs under quasi-static axial compression / Journal of Constructional Steel Research 90:235~244
AIJ / 1997 / Recommendations for Design and Construction of Concrete Filled Steel Tubular Structures / Architectural Institute of Japan
AISC-LRFD / 1999 / Load and resistance factor design specification for structural steel buildings / American Institute of Steel Construction (AISC), Inc
AISC / 2010 / Specification for structural steel buildings / American Institute of Steel Construction(AISC)
AL-Shaar, A. A. / 2018 / Performance of retrofitted self-compacting concrete-filled steel tube beams using external steel plates / Adv. Mater. Sci. Eng 2018:18
AIJ / 1997 / Recommendations for Design and Construction of Concrete Filled Steel Tubular Structures / Architectural Institute of Japan
AISC-LRFD / 1999 / Load and resistance factor design specification for structural steel buildings / American Institute of Steel Construction (AISC), Inc
AISC / 2010 / Specification for structural steel buildings / American Institute of Steel Construction(AISC)
AL-Shaar, A. A. / 2018 / Performance of retrofitted self-compacting concrete-filled steel tube beams using external steel plates / Adv. Mater. Sci. Eng 2018:18
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