Behavior of Filled and Encased Composite Column Using 3D Numerical Modelling ANSYS

摘要

This paper addresses the behavior of concrete-filled steel tubes and concrete-encased steel. The composite structure under study was simulated with a tridimensional numerical model using the ANSYS software, which is based on the finite element method (FEM). Two reference models were validated with previously obtained experimental results and were used as references for the parametric study. The parameters considered in the study included the concrete grade, steel size and steel grade. Axially static load has been applied to the models with coupling technique. Plotting of load-displacement has been obtained to study the column behavior in terms of stress concentration and ductility. Analysis of the results led to the conclusion that changing a single parameter did not increase the column capacity because the failure was transferred to other structural elements in the composite section. Instead, the concrete grade and steel dimensioning procedure should consider the entire set of parameters to guarantee the structure's strength. The final results obtained from the study of composite column are enhancement or reduction capacity of column that has a significant influence on the strength of the column due to changes in the material properties. Type of composite column is highlighted to consider for effectively chosen as building structure. Finally, the composite column behavior is discussed in detail, and recommendations for the design are presented.