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Steel and Composite Structures   Volume 22, Number 2, October10 2016, pages 217-234
Studies on T-Shaped composite columns consist of multi separate concrete-filled square tubular steel sections under eccentric axial load
Bin Rong, Guangchao You, Ruoyu Zhang, Changxi Feng and Rui Liu

Abstract     [Buy Article]
    In order to investigate mechanical properties and load-bearing capacity of T-shaped Concrete-Filled Square Steel Tubular (TCFST) composite columns under eccentric axial load, three T-shaped composite columns were tested under eccentric compression. Experimental results show that failure mode of the columns under eccentric compression was bending buckling of the whole specimen, and mono column performs flexural buckling. Specimens behaved good ductility and load-bearing capacity. Nonlinear finite element analysis was also employed in this investigation. The failure mode, the load-displacement curve and the ultimate bearing capacity of the finite element analysis are in good agreement with the experimental ones. Based on eccentric compression test and parametric finite element analysis, the calculation formula for the equivalent slenderness ratio was proposed and the bearing capacity of TCFST composite columns under eccentric compression was calculated. Results of theoretical calculation, parametric finite element analysis and eccentric compression experiment accord well with each other, which indicates that the theoretical calculation method of the bearing capacity is advisable.
Key Words
    TCFST; finite element analysis; bearing capacity; the equivalent slenderness ratio; eccentric compression test
(1) Bin Rong:
Department of Civil Engineering, Tianjin University, Tianjin, 300072, China;
(2) Bin Rong, Guangchao You, Ruoyu Zhang, Changxi Feng, Rui Liu:
Key Laboratory of Coast Civil Structure Safety, Tianjin University, Tianjin, 300072, China.

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