ANALYTICAL RESPONSE OF CONCRETE FILLED STEEL TUBULAR COLUMN UNDER AXIAL LOADS

摘要

The constitutive model in this paper addresses the behavior of Concrete filled steel tubular column on the compressive response due to axial loads. Three-dimensional nonlinear finite element models are developed to study the force transfer between steel tube and concrete core. The nonlinear finite element program ABAQUS 6.8 is used. The interaction between steel tube and concrete core is the discussing issue for understanding the behavior of concrete-filled steel tube columns (CFST). The elasto-plastic model is based on the Drucker-Prager yield criterion. A comparison of experimental failure loads with the predicted failure loads in accordance with the method described in Euro code Part-4 showed good agreement for axially loaded columns.