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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.38 No.6
- 발행연도
- 2021.1
- 수록면
- 617 - 635 (19page)
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This paper numerically investigated the behavior of built-up square concrete-filled steel tubular (CFST) columns under combined preload and axial compression. The finite element (FE) models of target columns were verified in terms of failure mode, axial load-deformation curve and ultimate strength. A full-range analysis on the axial load-deformation response as well as the interaction behavior was conducted to reveal the composite mechanism. The parametric study was performed to investigate the influences of material strengths and geometric sizes. Subsequently, influence of construction preload on the full-range behavior and confinement effect was investigated. Numerical results indicate that the axial load-deformation curve can be divided into four working stages where the contact pressure of curling rib arc gradually disappears as the steel tube buckles; increasing width-to-thickness (B/t) ratio can enhance the strength enhancement index (e.g., an increment of 1.88% from B/t=40 to B/t=100), though ultimate strength and ductility are decreased; stiffener length and lip inclination angle display a slight influence on strength enhancement index and ductility; construction preload can degrade the plastic deformation capacity and postpone the origin appearance of contact pressure, thus making a decrease of 14.81%～27.23% in ductility. Finally, a revised equation for determining strain εscy corresponding to ultimate strength was proposed to evaluate the plastic deformation capacity of built-up square CFST columns.
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참고문헌 (45)
참고문헌 신청
Jian Cai / 2006 / Axial load behavior of square CFT stub column with binding bars / Journal of Constructional Steel Research 62(5):472~483
Chen, Z. Y. / 2003 / Test of the lateral pressure of the wall of concrete-filled rectangular steel columns at construction stage / Build. Struct 33(7):27~28
Ehab Ellobody / 2007 / Nonlinear behavior of concrete-filled stainless steel stiffened slender tube columns / Thin-Walled Structures 45(3):259~273
Hanbin Ge / 1992 / Strength of Concrete‐Filled Thin‐Walled Steel Box Columns: Experiment / Journal of Structural Engineering 118(11):3036~3054
Han, L. H. / 2016 / Concrete Filled Steel Tubular Structures——Theory and Practice / Science Press
Chen, Z. Y. / 2003 / Test of the lateral pressure of the wall of concrete-filled rectangular steel columns at construction stage / Build. Struct 33(7):27~28
Ehab Ellobody / 2007 / Nonlinear behavior of concrete-filled stainless steel stiffened slender tube columns / Thin-Walled Structures 45(3):259~273
Hanbin Ge / 1992 / Strength of Concrete‐Filled Thin‐Walled Steel Box Columns: Experiment / Journal of Structural Engineering 118(11):3036~3054
Han, L. H. / 2016 / Concrete Filled Steel Tubular Structures——Theory and Practice / Science Press
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