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Numerical Investigation of High-Strength CFST Columns with Slender Sections
Concrete filled steel tube (CFST) columns have been widely used in structures largely subjected to compression such as high-rise buildings. To achieve taller constructions, engineers have improved CFST columns performance by applying high-strength materials to make the columns slender. Although the current standards [1, 2, 4] have taken CFST columns into practice, there are restrictions in the material strength and the section slenderness. To solve the problem, this paper presents a numerical examination of CFST columns fabricated from high-strength materials as well as slender sections under axial compression. For verification, a finite element (FE) model, taking into account the initial local imperfection, residual stress on a tube, the confinement effect of filled concrete and the buckling and post-buckling behavior of steel, was developed for CFST columns. Ultimate strengths obtained from numerical analysis were compared with practical code and experimental results to verify its reliable prediction. A parametric study of CFST columns with different concrete compressive strengths f′c, steel yield stresses fy and the width to thickness ratios B/t was also presented in the paper.
Numerical Investigation of High-Strength CFST Columns with Slender Sections
Concrete filled steel tube (CFST) columns have been widely used in structures largely subjected to compression such as high-rise buildings. To achieve taller constructions, engineers have improved CFST columns performance by applying high-strength materials to make the columns slender. Although the current standards [1, 2, 4] have taken CFST columns into practice, there are restrictions in the material strength and the section slenderness. To solve the problem, this paper presents a numerical examination of CFST columns fabricated from high-strength materials as well as slender sections under axial compression. For verification, a finite element (FE) model, taking into account the initial local imperfection, residual stress on a tube, the confinement effect of filled concrete and the buckling and post-buckling behavior of steel, was developed for CFST columns. Ultimate strengths obtained from numerical analysis were compared with practical code and experimental results to verify its reliable prediction. A parametric study of CFST columns with different concrete compressive strengths f′c, steel yield stresses fy and the width to thickness ratios B/t was also presented in the paper.
Numerical Investigation of High-Strength CFST Columns with Slender Sections
Lecture Notes in Civil Engineering
Madhavan, Mahendrakumar (editor) / Davidson, James S. (editor) / Shanmugam, N. Elumalai (editor) / Nguyen, Trac (author) / Ngo, Tuan (author) / Thai, Huu-Tai (author)
Indian Structural Steel Conference ; 2020 ; Hyderabad, India
Proceedings of the Indian Structural Steel Conference 2020 (Vol. 2) ; Chapter: 24 ; 297-311
2023-08-23
15 pages
Article/Chapter (Book)
Electronic Resource
English
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