| For the cold-formed lipped channels subjected to the axial compression, the stability is the control factor because of the slender sections. The possible buckling models are the local buckling, the global buckling and the local and global interactive buckling. Among of all, the local and global interactive buckling is very complicated. In this paper, the relational theories and calculated methods are concluded, and then the local and global interactive buckling is researched by means of experiment and ANSYS software simulation.The details are as folio wings: Firstly, based on consulting multiple references, the paper concluded the calculated methods of the stability of the cold-formed steel members subjected to the axial compression, and then worked out the relational calculated program by FORTRAN language. Secondly, based on the test of the cold-formed steel members subjected to the axial compression, this paper studied the break form and the load capability, acquired the test data about the cold-formed steel members subjected to the axial compression and they are used as the standard to estimate the theoretical analysis and ANSYS simulation. And the stress contour figures, strain contour figures, load-displacement curves are acquired. The simulated results are contrasted to the test ones and they prove the correctness of the test results and theoretical ones. And then the relational parameters are modified, numerical simulation is conducted by nonlinear finite element method by means of ANSYS software too. A series of are acquired. On the basis of those ultimate capacities, the regression analysis are carried out, and the approximate formulas are fit to the ultimate capacity of the cold-formed C steel members subjected to the axial compression, then the calculated results are contrasted to the criteria. Finally, the conclusions and the research expectations are presented, and some design suggestions are advanced. |
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