Under axial load finite element analysis of characteristics of circular steel tube compile short column filled with steel reinforced concrete

摘要

With the help of large general finite element analysis software ANSYS, under different parameters, this paper will have a finite element analysis of bearing capacity on circular steel tube compile short column filled with steel reinforced concrete(STCSRC).In the paper, it uses separate models to calculate and analyze. Considering the nonlinear constitutive relation of steel and concrete and determining the type of unit, it is shown that stress distribution and load-displacement curve of specimen under the effect of different parameters. According to the curve and data, analysis results of bearing capacity of specimen have been shown that bearing capacity of STCSRC will increase with concrete strength increasing and it also will increase with steel rate increasing under axial load. Because of core concrete working together with steel tube and angle steel, it can significantly improve the bearing capacity of composite columns, slow down and inhibit shearing inclined cracks occur in the core concrete and develop, and improve the ductility of columns.