| Concrete-filled steel tubular structure gives full play to its two materials' superiority in technology and economics over others, embodies the development direction of the engineering material at present, it is a composite structure with great development potential and application value. The joint is the key part of the structure,it also has technology difficulties in construction.The reasonable design of the joint related to the safety of the structure and the cost of the whole project,it is of great significance in the theoretical research and the engineering application. Therefore,obtaining complete and accurate information about the joints' performance is of great important for the frame analysis and the safety and reliability of the structure.With the extensive application of the concrete-filled steel tubular structure and the diversification trend of the form of building structure, the apllication of concrete-filled steel tubular column to steel reinforced concrete beam with multiway skew angle will be more extensive, however at present, theoretic research on the mechanical properties of the annular plane is mainly according to single beam or double beams.Therefore.the paper take the main structure of Hohhot' East Railway Station' main structure as an example,using the joints in key position of the main structure as the original model.The general software-ANSYS has been used to simulate the original model,in the analysis, SHELL143 and BEAM188 have been used, constraint equation has been used to transmit force between the two elements,material nonlinearities are contained.When the intersection angle is 25°,30°,35°,40°and 45°,the stress value on the annular plane which bears horizontal distribution force from section steel and concentrated force from reinforced is obtained.The effect of the angles variation on the stress distribution of the annular plane is discussed,the related rule is summarized.The theory may provide useful information for the design of the joints in future. |
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