Design Analysis of 110kV Double Circuit Narrow-Base Steel Pipe Tower

Ye Xin,Xiaoxu Fu,Jingfeng Guo,Ming Xie,Yinhe Lin

doi:10.1051/e3sconf/202128301040

Ye Xin, Xiaoxu Fu + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202128301040

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Abstract

Secondary bending moment and geometric nonlinearity should be taken into account in pipe tower design. Taking the 110kV double-circuit narrow-base steel pipe tower as an example, the 110 kV double-circuit narrow-base steel pipe tower is compared and analyzed through the tower structure design software and the general finite element software ANSYS. The analysis results show that the narrow-base steel tube tower should adopt a rigid-truss structure model, and the influence of the secondary bending moment of the main material and the geometric nonlinearity should be considered. The secondary bending moment effect accounts for about 10-20% of the strength stress of the steel pipe main material. Through comparative analysis, a number of design points are summarized, which provides a certain practical guiding significance for the design and application of the double-circuit narrow-base steel pipe tower.

Highlights

With the continuous development of Chinese power grid construction, the line corridors have become more and more narrow
By establishing a finite element calculation model, it is very necessary to analyze the influence of structural geometric nonlinearity and secondary bending moments on the structure of the narrow-base tower[3]
The following uses linear and geometric nonlinearity to compare the displacement and internal force of the narrow-base steel tube tower. It can be seen from the data comparison in Table 1~2: 1) Compared with the rigid-truss hybrid model and the truss model, the axial force of the main steel pipe material is reduced by about 2%, but considering the effect of the secondary bending moment of the main material of the tower body, the strength and stress of the rigid-truss model is about 12%-20% than that of the truss model

Summary

Introduction

With the continuous development of Chinese power grid construction, the line corridors have become more and more narrow. By establishing a finite element calculation model, it is very necessary to analyze the influence of structural geometric nonlinearity and secondary bending moments on the structure of the narrow-base tower[3]. Calculation model and method of narrow base steel pipe tower

Results

Conclusion