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Axial compression behavior and analytical method of L-shaped column composed of concrete-filled square steel tubes |
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| Authors: | Bin Rong ?? Zhihua Chen Fafitis Apostolos Nan Yang ? |
| Institution: | 1. Key Laboratory of Coast Civil Structure Safety(Tianjin University), Ministry of Education, Tianjin 300072, China;School of Civil Engineering, Tianjin University, Tianjin 300072, China;School of Civil Engineering, Xinjiang University, Urumqi 830046, China 2. Key Laboratory of Coast Civil Structure Safety(Tianjin University), Ministry of Education, Tianjin 300072, China;School of Civil Engineering, Tianjin University, Tianjin 300072, China 3. Department of Civil and Environmental Engineering, Arizona State University, Tempe 85287, USA 4. School of Civil Engineering, Tianjin University, Tianjin 300072, China |
| Abstract: | Based on the characteristics of an L-shaped column composed of concrete-filled square steel tubes, the axial compression experiment and nonlinear finite element analysis were carried out to study the mechanical property of the L-shaped column. The load-displacement curve for the L-shaped column, the deflection and load-strain curves for the mono columns were obtained by the axial compression experiment. The results show that the L-shaped column exhibits a flexural-torsional buckling failure mode. The numerical simulation by the finite element analysis shows that the bearing capacity and failure mode are in accordance with those of the axial compression experiment and the feasibility of the finite element analysis is proved. For the calculation of the bearing capacity of the L-shaped column composed of concrete-filled square steel tubes, an analytical method is proposed based on the theory of the elastic stability and spatial truss model. The results of the analytical method are in good agreement with those of the axial compression experiment and the finite element analysis. |
| Keywords: | L-shaped column concrete-filled square steel tube axial compression experiment finite element analysis analytical method |
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