Simulation Analysis of Steel-Tube-Confined Concrete-Filled Square Steel Tubes Column Under Axial Compression Based on Abaqus Software

In order to improve the mechanical performance of concrete-filled square steel tubular columns, the steel-tube-confined concrete-filled square steel tube (TCFST) column is formed by adding steel tubes around the concrete-filled square steel tube columns. The numerical model is established by computer simulation technology based on Abaqus software, and the stress analysis is carried out. The ultimate bearing capacity of steel-tube-confined concrete-filled square steel tubes column is predicted by BP neural network model. The results show that the bearing capacity and deformation capacity of concrete-filled square steel tube column can be improved by using steel tube confined concrete column. When the outer steel tube is confined by circular steel tube, the total bearing capacity of the concrete-filled square steel tube (SCFST) column is increased by 60.6%, respectively, compared with the unconfined concrete-filled square steel tube column. The prediction results of the bearing capacity of the specimens by the BP neural network model are in good agreement with the finite element and experimental results, which verifies the effectiveness of the BP neural network model.