特高压大跨越塔内力分析

In terms of structure design for transmission towers, early because of restricted by calculation method, are generally will tower inner force analysis that was decomposed into several pieces of plane truss. This method omits truss space effect, is a kind of approximate calculation method. Later adopted a more accurate method of space truss, considering the relations between the deformation coordination of bar of tower structure and the mechanical equilibrium conditions, can reflect the actual situation of the tower stress relatively and accurately. The above calculation method ignore the interaction of the influence of secondary moment and torque to the structure. In recent years, high voltage, large capacity of transmission lines construction become the trend of the development of the grid technology. Gradually to develop in the direction of high, long-span transmission tower, component cross section increases gradually, the second-order stress effect on the structure is becoming more and more important. The truss method in some special structure and the adaptability of complex working conditions should be tested by experiment and other finite element calculation software review.TTA software and finite element software, the author of this paper the calculation results of comparative analysis, it is concluded that the tower is easy to appear damage location, and put forward solutions, to provide the reference for the future of the iron tower design.