Gust Response Factor of a Transmission Tower Under Typhoon,International Journal of Structural Stability and Dynamics

当前位置： X-MOL 学术 › Int. J. Struct. Stab. Dyn. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Gust Response Factor of a Transmission Tower Under Typhoon
International Journal of Structural Stability and Dynamics ( IF 3.6 ) Pub Date : 2020-08-31 , DOI: 10.1142/s0219455421500012
Xing Fu ₁ , Wen-Long Du ₁ , Hong-Nan Li _{1,

2} , Wen-Ping Xie ₃ , Kai Xiao ₃ , Xu Lei ₃

Affiliation

The gust response factors (GRFs) of transmission towers in current standards are reviewed for synoptic winds. The collapse of most transmission towers has occurred under the high-intensity wind (HIW) caused by events such as typhoons, hurricanes, and downbursts. Thus, this paper studies the GRF of a transmission tower under the typhoon. First, the definition of GRF and its extended form for the transmission towers are developed. Then the wind speed simulation of a typhoon event is introduced. Based on the structural health monitoring (SHM) system installed on tower #32, the measured GRFs under the super typhoon Mangkhut are calculated. Then the finite element model (FEM) of the transmission tower-line system is established to simulate the dynamic response to further calculate the GRFs, which agrees well with the field measurements. Both the field measurement and simulation results show that the GRFs under the typhoon are larger than those under the synoptic wind and that the recommended GRFs in the Chinese standard underestimate the peak responses. Finally, a parametric analysis is performed, which demonstrates that the turbulence intensity, wind speed, and power-law exponent all have great effects on the GRFs of transmission towers. In the HIW-prone areas, it is recommended that the characteristics of the HIW can be considered in improving the GRF values to guarantee the structural safety of transmission towers.

更新日期：2020-08-31

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>