Wind resistance and reinforcement transformation method of high-voltage and superhigh-voltage power transmission line iron tower

A technology for transmission line towers and transmission towers, which is applied to towers, building structures, building maintenance, etc., can solve problems such as structural dynamic instability, damage, and external deformation, and achieve economical cost, significant effects, and simple and clear thinking

Inactive Publication Date: 2012-07-04
TONGJI UNIV +1
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Problems solved by technology

In this case, the local mode shape of the lower part of the iron tower structure is very serious. Under the dynamic action of wind, if the local mode shape is excited, it is likely to cause dynamic instability and damage to the structure; static calculations also show that in the absence of diaphragm On the tower section above, the diagonal bracing has a very large out-of-plane deformation, which is consistent with the field investigation results of wind-induced collapse of transmission towers

Method used

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  • Wind resistance and reinforcement transformation method of high-voltage and superhigh-voltage power transmission line iron tower
  • Wind resistance and reinforcement transformation method of high-voltage and superhigh-voltage power transmission line iron tower
  • Wind resistance and reinforcement transformation method of high-voltage and superhigh-voltage power transmission line iron tower

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Embodiment 1

[0019] Embodiment 1: For the iron towers of high-voltage and ultra-high-voltage transmission lines in areas prone to strong storms, first determine the location of the additional transverse section through a certain structural analysis method. For such as attached figure 2 For the lower structure of the tower body shown, the calculation shows that the slope of the tower body between the two diaphragms is consistent, and the number of diaphragms set according to the regulations is relatively small, resulting in the lack of effective out-of-plane diagonal bracing in the lower half of the tower body. a weak point. By adding two new transverse diaphragms 3 at the level of the intersection point 7 of the first-level braces, the premature occurrence of local mode shapes can be effectively suppressed, and the out-of-plane deformation of the first-level braces can be significantly reduced. The two transverse partition structures are selected as attached image 3 In the form of the m...

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Abstract

The invention belongs to the technical field of power transmission line equipment, particularly relates to a wind resistance and reinforcement transformation method of a high-voltage and superhigh-voltage power transmission line iron tower. The method comprises the following steps of: increasing a tabula surface at a proper position within the range of a power transmission tower body to improve the rigidity and the stability of the high-voltage and superhigh-voltage power transmission line iron tower, and adopting a method increasing the cross section of a rod piece at a local weak part of a power transmission tower according to different tower shapes to improve local bearing capacity; and in consideration of the safety of the structure of the power transmission tower during site operation, the invention further provides a specific construction method during reinforcement. The method is simple in design and construction, less in steel dosage, and prominent in effect, and can be widely used for the wind resistance and reinforcement transformation of the high-voltage and superhigh-voltage power transmission line iron tower, so that the whole rigidity of the power transmission tower can be improved, and the whole damage caused by the buckling and the instability of a local rod piece can be reduced.

Description

technical field [0001] The invention belongs to the technical field of power transmission line equipment, and in particular relates to a wind-resistant reinforcement reconstruction method for iron towers of high-voltage and ultra-high-voltage transmission lines. Background technique [0002] As an important part of a large and complex lifeline system, the safety of the power transmission system directly affects the country's production and construction and the people's living order. The damage to the transmission line will lead to the paralysis of the power supply system, and may cause secondary disasters such as fire, resulting in serious economic losses. The transmission tower line system has the characteristics of high and flexible structure, large span of ground wire, and strong nonlinearity. It is a wind-sensitive structural system. Severe storm is one of the most threatening natural disasters to transmission lines, and damage accidents to transmission lines caused by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G23/00E04H12/10
Inventor 谢强朱瑞元林韩郑瑞忠翁兰溪陈强
Owner TONGJI UNIV
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