A method for evaluating the structural state of a transmission tower

Abstract

The invention provides a method for evaluating the structural state of a transmission tower. The method comprises the following steps of S1 collecting the relevant data of the transmission tower and the transmission line, initially grasping the operation situation, and screening out obvious structural problems; S2 establishing the three-dimensional finite element model of the transmission tower and the finite element model of a conductor by the ANSYS software; 3 calculating the static parameters and the dynamic parameter based on the three-dimensional finite element model of the transmission tower; S4 according to the difference between the static and dynamic parameters and their corresponding standards, selecting the corresponding treatment mode.. Based on the finite element to evaluate the structural state of the transmission tower, the method is convenient for transmission line maintenance and repair personnel and related scientific research personnel to evaluate the operation stateof the transmission tower, and then take corresponding measures to ensure the structural safety of the transmission tower.

Description

technical field [0001] The invention belongs to the field of transmission tower monitoring, and in particular relates to a method for evaluating the structural state of a transmission tower. Background technique [0002] Power grid transmission tower is a kind of high-rise structure widely used. As an important power engineering facility, it has important economic and social significance to ensure the safe and reliable operation of the main structure system under various loads. However, transmission lines are the "lifeline" of electric energy transmission, and accidents of tower collapse and disconnection occur from time to time. [0003] The structural failure accidents of transmission towers can be roughly divided into three categories. One type is due to the tower being subjected to external forces, such as earthquakes, typhoons, tornadoes, ice-wrapped static forces, dynamics, or combined static and dynamic effects of structural instability or damage caused by exceeding ...

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Problems solved by technology

Another type of accident is the change of inherent characteristics caused by material aging, bolt looseness, corrosion and other performance degradation of the tower structure after long-term service. Even if the design standard for disaster climate conditions is not exceeded, it may cause local damage to the structure and gradually evolve into instability or fracture. down tower

Another category is the complex area of ​​the line route. For example, the transmission tower is located in the goaf of the coal mine, the heavy industrial pollution area, the river, lake and wetland area, and the mountainous area prone to landslides. Changes in the surrounding environment will affect the operation safety of the transmission tower.

[0004] The current judgment on the operation status of transmission towers is generally based on visual inspection, such as regular inspections, inspection of loose bolts, missing or deformed rods, corrosion of tower materials, changes in the root of the tower, and foundation settlement, etc., and then judge the transmission tower based on experience Whether it is reliable to operate, lack of theoretical support

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