Axial compression behavior and analytical method of L-Shaped column composed of concrete-Filled square steel tubes

作者：Rong Bin^*; Chen Zhihua; Apostolos Fafitis; Yang Nan

来源：Transactions of Tianjin University, 2012, 18(3): 180-187.

DOI：10.1007/s12209-012-1766-x

• Analytical method
• Axial compression behavior
• Compression experiments
• Concrete-filled square steel tube
• Elastic stability
• Flexural-torsional buckling
• L-shaped
• Load-displacement curve
• Load-strain curves
• Non-linear finite-element analysis
• Spatial truss

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.

• 出版日期2012
• 单位天津大学