Abstract: Finite element software ABAQUS was used to establish a mechanical model of concrete-filled steel tubular component with encased profile steel subjected to the action of the bending. With the help of the rationality of experimental verification models available, based on checking the accuracy of those, the deflection regularity, stressing process, and failure mode of this kind of components under action of bending moment influence of component parameters such as material property, steel inclusion rate in profile steel, and its sectional form on the ultimate bearing capacity and flexural stiffness of the bent component was analyzed, also. Its evaluation was carried out by means of introduction of calculation formula of flexural bearing capacity of integral column in European Code, and its calculation result was compared with the results of experiment and finite element simulation available. Their agreement was fine enough, showing that that formula of composite columns in European Code can be used for the design of that category of component. The result of this investigation can provide certain reference for the design of the concrete-filled steel tubes with encased profile steel under bending load.

Key words: finite element, bending moment, stress, strain, computation formula