ABSTRACT
A new prefabricated special-shaped steel lattice column structure was proposed to solve the contradiction between the convex column and the insufficient lateral stiffness in the traditional prefabricated steel structure. Based on the double-coefficient product method, a calculation method for the bearing capacity of special-shaped steel lattice columns was provided, considering the influence of eccentricity. Parameter analysis was conducted using ABAQUS based on model verification. The influence mechanism of key factors such as the converted slenderness ratio and eccentricity on the bearing capacity of special-shaped steel lattice columns was studied. The load-displacement curve was obtained, revealing the failure modes of special-shaped steel lattice columns under different stress states. The results showed that the ultimate bearing capacity of special-shaped steel lattice columns is positively correlated with the number of column limbs; the influence of column height on the flexibility of L-shaped steel lattice columns is more obvious; the greater the eccentricity, the ultimate bearing capacity of special-shaped steel lattice column decreases more sharply.
