Anti-typhoon design method for pole tower in coastal area

Abstract

The invention relates to the technical field of power transmission lines, and discloses a coastal region tower anti-typhoon design method which comprises the following steps: S1, designing the maximum typhoon wind speed according to a known typhoon wind speed time history curve; s2, calculating a tower wind pressure height change coefficient according to a wind pressure height coefficient designed during tower anti-typhoon design; s3, according to the designed typhoon maximum wind speed and the calculated tower wind pressure height change coefficient, the tower ground wire wind load and the tower body wind load are calculated; the method has the advantages that windproof technical guidance can be provided for the power transmission line, and the typhoon resisting capacity of the power transmission line is effectively improved.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a typhoon-resistant design method for towers in coastal areas. Background technique [0002] Affected by global warming, wind disasters caused by special climates represented by typhoons tend to increase in frequency and severity in all parts of the world. At the same time, the results of a large number of field measurements in recent years have shown that the wind environment characteristics of the typhoon near the ground boundary layer are different from those of the benign climate model. As a structure sensitive to wind load, transmission towers are often collapsed in typhoon transit areas. Therefore, the current primary task is to compare the differences in the characteristic parameters of the typhoon and the conventional wind field, and to clarify the wind load acting on the tower under the action of the typhoon. [0003] For the wind load excitation calculation...

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Problems solved by technology

[0006] "Technical Regulations on the Design of Tower Structures for Overhead Power Transmission Lines" (SDGJ94-90, promulgated and implemented in 1990, hereinafter referred to as "90 regulations"); the design safety factor is 1.5, and the design wind speed is once in 30 years (500kV) and once in 15 years ( 220kV and below), the gust effect is not fully considered in the wind load calculation of the tower body, and the gust effect is not considered in the wind load calculation of the ground wire;

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