Wind load investigation of self-supported lattice transmission tower based on wind tunnel tests

Zhang Wentong; Xiao Yiqing; Li ChaoZheng QingxingTang Yanan

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Wind load investigation of self-supported lattice transmission tower based on wind tunnel tests

机译：Wind load investigation of self-supported lattice transmission tower based on wind tunnel tests

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摘要

Through a series of wind tunnel tests on a self-supported lattice transmission tower model, the wind loads on the tower were investigated in this paper. According to similarity laws, the scaled tower model was designed and fabricated, and the atmospheric boundary layer wind field of Category-B specified in Chinese load code was simulated in the wind tunnel laboratory. Based on the aeroelastic wind tunnel tests and the high frequency force balance tests, the dynamic vibrations, the nondimensional wind force coefficients and the generalized power spectral densities (PSDs) of dynamic wind forces were analyzed and discussed. For the convenient application, the empirical formulas of the generalized PSDs of dynamic wind forces were established and the nonlinear mode shape correction was introduced, which were verified via comparison between the aeroelastic tests and the calculated dynamic responses of tower top. It is indicated that the unfavorable wind attack angles may happen around theta = [15 degrees 30 degrees] and theta = [60 degrees 75 degrees] for this type of tower; the generalized PSDs of wind forces are unimodal in shape, and the corresponding effective bandwidths and the nondimensional frequencies of peaks vary with the wind attack angle theta, especially those of the cross-wind forces are larger than those of the along-wind forces obviously; the established empirical formulas of the generalized PSDs of dynamic wind forces and the derived nonlinear mode shape correction factor are applicable.

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来源
《Engineering structures》 |2022年第1期|113575.1-113575.15|共15页
作者
Zhang Wentong; Xiao Yiqing; Li ChaoZheng QingxingTang Yanan;
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作者单位

Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen, Guangdong, Peoples R China;

Architectural Design & Res Co Ltd, Shenzhen Gen Inst, Shenzhen, Guangdong, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
Transmission tower; Wind tunnel test; Wind force; HFFB; Nonlinear mode shape correction;

Wind load investigation of self-supported lattice transmission tower based on wind tunnel tests

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