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Buckling resistance of axially loaded square concrete-filled double steel tubular columns
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논문 기본 정보

Type
Academic journal
Author
Junchang Ci (Beijing University of Technology) Mizan Ahmed (Beijing University of Technology) Viet-Linh Tran (Vinh University) Hong Jia (CRCC Development Group Co. Ltd) Shicai Chen (Beijing University of Technology) Tan N. Nguyen (Ton Duc Thang University Vietnam)
Journal
International Association of Structural Engineering And Mechanics Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.43 No.6
Published
2022.6
Pages
689 - 706 (18page)

Usage

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Buckling resistance of axially loaded square concrete-filled double steel tubular columns
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Thin-walled square concrete-filled double steel tubular (CFDST) columns composed of the inner circular tube filled with concrete can be used to carry the large axial loads or strengthen existing CFST columns in composite constructions. This paper reports an experimental program carried out on short square CFDST columns loaded concentrically. The influences of important column parameters on the post-buckling performance of such columns are investigated. Test results exhibit that the inner circular tube significantly improves the ultimate loads and the ductility of such columns compared to conventional concrete-filled steel tubular (CFST) and double-skin CFST (DCFST) columns with an inner void. A mathematical model developed is used to simulate the ultimate strengths and load-strain curves of such columns loaded axially. Furthermore, the ultimate strengths of such columns are predicted using existing codified design models for conventional CFST columns as well as the formulas proposed by previous researchers and compared against a large database comprising 500 CFDST columns. Lastly, an accurate artificial neural network model is developed for the practical applications of such columns under axial loading.
#artificial neural network #axial loading #CFDST columns #post-buckling #short columns

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