Introduction Composite column will give economic advantages and will be able to resist large load capacity with a smaller cross section compared to using conventional reinforced concrete columns. The first crack dominantly occurs in the support area and generally occurs in the concrete blanket layer, when it reaches the ultimate crack condition has already occurred evenly across the column area.ฤก. The pattern of stress-strain distribution during yielding spreads throughout the column area, but when it reaches the ultimate distribution it is concentrated in the pedestal area. Based on the results of the analysis, it shows that the higher column capacity reduced ability ultimate axial load for the higher it is profile steel grade result improve ultimate load resistance, while influence encased steel to ultimate axial load for all model is not significant.
According to Indonesian Structural Steel Code, manual calculation analysis is more suitable to represent the composite column behavior of collapsed condition. The behavior of composite columns can be determined by the analysis of calculation and FEM that columns with tensile collapsed condition has a lower flexural capacity and collapse behavior is more ductile than that of the column with compressive collapse and balanced condition.
The results shows that the composite column can be analyzed using ANSYS software with modified model. The capacity of axial load, deformation, stress, strain, fracture patterns and ductility is determined by what occurs on a single composite column with wide flange and hollow section of steel confinement. This paper discusses about 3D ANSYS FE modeling of the failure behavior of encased composite steel-concrete element.