| Construction of transmission towers plays an important role in the electric power industry. In the transmission towers with various kinds of shapes, steel tubular towers are more and more widely used because of their superiority. It's very necessary to launch the research on mechanical performance of steel tubular towers to throw light on practical construction. The multi-plannar steel tubular joints and the flange joints are two very important and primary connection joints for tubular towers. Their mechanical characteristics and analysis methods are always the significant research problems.Nonlinear finite element analysis on the tubular KK-joints (Circular Braces) has been carried on in this dissertation. The rules are summarized from the relation between the ultimate bearing capacity and parameters. The results from the models are compared with the solution according to the code for steel structure (GB50017-2003), some useful conclusions are drawn. Also, the rigid flanges under the axial force are analyzed in software ANSYS. And the influence of different thickness of the flange plate on the load-bearing capacity are analyzed. The results using finite element method are compared with the solution gotten from the Technical Regulation of Design for Tower and Pole Structures of Overhead Transmission Line (DL/T5154-2002). Finally, the related advice was put forward about the regulation of the minimum thickness of the flange plate.
|
PDF Full Text Request