Method for calculating bearing capacity of ultra-high-voltage transmission tower true test data node main pipe

Abstract

The invention discloses a method for calculating the bearing capacity of a main pipe of a data node of an ultra-high voltage transmission tower true-type test, and the method comprises the following steps: carrying out the K-type node bearing capacity test of a test component of a steel pipe plugboard, and determining main factors affecting the bearing capacity of a K-type node; establishing an influence model of each factor on the bearing capacity of the K-shaped node; fitting finite element results in each influence model, and establishing a suggestion model for calculating the bearing capacity of the K-type node; substituting each factor parameter of the K-shaped node connected with the steel pipe plugboard to be evaluated into the suggestion model to obtain the ultimate main pipe bearing capacity value of the K-shaped node connected with the steel pipe plugboard. According to the method, the bearing capacity calculation model of the K-shaped node connected with the annular reinforcing plate steel pipe inserting plate is obtained through the energy principle, the mutual relation among the main pipe axial force, the main pipe wall bending moment and the shearing force is reflected, the ultimate bearing capacity of the K-shaped node can be accurately evaluated, and the deviation between the ultimate bearing capacity and the test result is small.

Description

technical field [0001] The invention relates to the field of transmission iron towers, in particular to a method for calculating the bearing capacity of a superintendent of data nodes in a real-type test of an ultra-high voltage transmission iron tower. Background technique [0002] The steel pipe tower with pipe-connection joints has the problem of local buckling of steel pipes. In actual transmission towers, ring stiffeners are added to reduce the influence of local buckling. However, there is no corresponding design checking method in my country. In December 2008, the phenomenon of local buckling of steel pipes was observed in the true type test of the SZT2 tower of the "1000kV AC same-tower double-circuit transmission line tower research" project jointly undertaken by China Electric Power Research Institute and China Consulting Group Corporation. China The Electric Power Research Institute has also initially carried out experimental research on local buckling of steel pi...

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Problems solved by technology

The form of the pipe joints in the special structure of the transmission tower is relatively special. In actual engineering, in order to improve the safety reserve of the design, some structur...

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