Research on bearing capacity of slender steel tubular columns filled with steel-reinforced high-strength concrete

摘要

Using the finite element analysis software to establish the finite element analysis model of composite column, this paper mainly studies the effect of slenderness ratio, strength of materials and steel tube wall thickness on the bearing capacity of composite column, and establishes the limit stability bearing capacity formula of the long column. The research results show that: the mechanical model meets the requirements of calculation; the slenderness ratio, eccentricity ratio and steel tube wall thickness have greater influence on the mechanical properties of long composite column, the impact of the material strength and the steel section shape is relatively small; the calculation results of bearing capacity formula agree well with the experimental results.