Analysis Of Effects On Stress By Location Of The Reinforced Bars

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 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 joint 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, SOLID45 and BEAM188 have been used, constraint equation has been used to transmit force between the two elements. According to the parameters,that the width of the annular plane,the amount and distribution and location of the reinforced bars, the stress value on the annular plane which bears horizontal distribution force from concentrated force from reinforcing bars is obtained. The effect of the direct weld 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.