Transmission tower main material bearing capacity calculation method considering bolt connection

A technology of transmission tower and calculation method, which is applied in the field of transmission tower to achieve the effect of reducing errors

Pending Publication Date: 2022-06-24
STATE GRID BAODING ELECTRIC POWER SUPPLY CO +3
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for calculating the bearing capacity of the main material of the power transmission tower considering the bolt connection. This method is aimed at the problem that the main material is damaged in a large number of power transmission tower collapse accidents, and the damaged position is relatively close to the node

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  • Transmission tower main material bearing capacity calculation method considering bolt connection
  • Transmission tower main material bearing capacity calculation method considering bolt connection
  • Transmission tower main material bearing capacity calculation method considering bolt connection

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Embodiment 1

[0052] Firstly, taking the components at the damaged position of a 220kV ZMC2 transmission tower as the research object, the CREO software is used to establish a three-dimensional solid model of the main material of the transmission tower with bolted connections. As shown in Appendix 1, the main material model of the transmission tower with bolted connection consists of main material 1, main material 2, outer steel, end plate 1, end plate 2 and bolts. The bolt preload is 60% of the ultimate bearing capacity of the bolt. The non-linear buckling analysis of the member is carried out to obtain the bearing capacity of the member. And the influence law of parameters such as slenderness ratio, bolt size, bolt pre-tightening force, number of loose bolts and main material assembly clearance on the ultimate bearing capacity of components is analyzed.

[0053] In order to analyze the influence of parameters such as slenderness ratio, bolt size, bolt pre-tightening force, number of loos...

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Abstract

The invention discloses a power transmission tower main material bearing capacity calculation method considering bolt connection, aims to solve the problem that the calculation of the bearing capacity of a power transmission tower main material containing bolt connection is not accurate enough, and provides a modeling method for calculating the bearing capacity of a main material component containing bolt connection by using a finite element method. The nonlinear buckling load of the power transmission tower main material containing bolt connection is calculated, and the load deformation process of the power transmission tower main material considering bolt connection is obtained. According to the method, the influence of additional bending moment generated due to existence of bolt nodes in the power transmission tower is considered, the error between the calculated bearing capacity of the main material of the power transmission tower and the actual situation is reduced, and therefore the bearing condition of the main material of the power transmission tower is simulated more accurately.

Description

technical field [0001] The invention belongs to the technical field of power transmission towers, and relates to a method for calculating the bearing capacity of a main material of a power transmission tower considering bolt connection under axial load. Background technique [0002] As an important part of the power system, the transmission tower plays a very important role in the safe operation of the power grid. At present, most of the transmission towers are made of equilateral angle steel connected by bolts. As a high-flexible structure, the main material of the transmission tower is one of the main stress-bearing components of the transmission tower. In order to facilitate construction and transportation, the main material usually needs to be connected in sections, and the bolted joint is very important to ensure the bearing performance of the transmission tower. In order to ensure the strength and stiffness of bolted joints, a larger number of bolts are usually requir...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/13G06F119/14
CPCG06F30/23G06F30/13G06F2119/14
Inventor 曾军佘凯徐永卫赵振华田江波杨洋钟乐鸣江文强
Owner STATE GRID BAODING ELECTRIC POWER SUPPLY CO
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