Method for calculating bearing capacity of node ring plates of circumferential stiffeners in steel tube tower by using true-type experimental data

Abstract

The invention discloses a method for calculating bearing capacity of node ring plates of circumferential stiffeners in a steel tube tower by using true-type experimental data, which comprises the following steps of carrying out a node plate flexural bearing capacity test on a test component of a steel tube insertion plate, and determining main factors influencing K-type node bearing capacity; establishing an influence model of each factor on the bearing capacity of each K-shaped node; fitting finite element results in each influence model, and establishing a suggestion model for calculating the bearing capacity of each K-type node; substituting each factor parameter of the K-shaped node connected with a steel pipe plugboard to be evaluated into a suggestion model to obtain the ultimate main pipe bearing capacity value of the K-shaped node connected with the steel pipe plugboard. The bearing capacity calculation model of each K-shaped node connected with the annular reinforcing plate steel pipe inserting plate is obtained through the energy principle, the mutual relationship among the main pipe axial force, the main pipe wall bending moment and the shearing force is reflected, the ultimate bearing capacity of each 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 power transmission iron towers, in particular to a method for calculating the bearing capacity of a ring plate of a steel pipe tower annular stiffener true-type test data node. 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 pipes and joints c...

AI Technical Summary

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 structural

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