| This paper choose ANSYS as the desk of finite element analysis to analysis those 3 components on the basis of choosing appropriate material models, stress-strain relationship and failure criteria and simulate the components of the failure process.Compared to the result of the paper,the finite element analysis with ANSYS to the S.R.C components with inequiaxial cross-section is proved to be feasible and reasonable.This paper also reveals the action behavior,failure patterns and ultimate bearing capacity of the S.R.C components with inequiaxial L--shaped cross-section in theory.The ANSYS research shows that the 3 components which are subjected to axial force and biaxial bending,the hypothesis of plane cross-section of average strain and the neutral axis being straight is still applicative in the S.R.C components with inequiaxial L--shaped cross-section.By drawing the load- deflection curves of nodes,descripting component failure process,analysising failure patterns and comparing with experimental results,the results show that they agree with each other well. Furthermore,this paper also studies the affection to the right section ultimate bearing capacity on the different strength of the concrete,the different steel ratio, the different load angle and the different compress ratio by the related curve of N--f,N--M and M_x--M_y of the L--shaped cross-section components. Finally,this paper also compares the ultimate bearing capacity between the S.R.C columns of the large-diameter reinforcement and shaped steel with the inequiaxial L--shaped cross-section and the S.R.C columns of the document,which have the same cross-shape and the location of loading point, the result shows that the ultimate bearing capacity of them has little difference,but the form of the large-diameter reinforcement and shaped steel is easy to handle in the node structure and facilitate the construction,so it is easier to popularize and use.
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