（同济大学土木工程防灾国家重点实验室，上海 200092）

 [摘要]格构式塔架在台风作用下发生破坏的现象十分普遍。台风与通常季风等良态风相比具有高湍流度等特性，而现行结构设计规范中并未考虑这些差别的影响。利用在同济大学上海浦东实测基地建立的40m高格构式钢管塔，完整记录了2012年台风“海葵”影响上海时塔架10m、20m、30m和40m高度处的风速时程和40m高度处部分时段的风振加速度响应时程。基于该实测数据，首先分析了各个高度顺风向湍流度随平均风速的变化特点；然后利用实测风速时程样本对格构式钢管塔进行加载，在有限元软件中进行风振时程分析，结果表明，当平均风速大于13m/s时，塔架4个实测高度处加速度响应均方根随平均风速近似线性增大；最后，根据数值分析结果，计算了格构式钢管塔不同高度处的风振系数数值达1.36~1.65，与台风下实测结果近似，比现行规范中规定的风振系数大13%左右。

[关键词]格构式钢管塔；台风“海葵”；现场实测；风振响应；风振系数

中图分类号：TU312.1

 *国家自然科学基金面上项目（51178352，51378396）。

作者简介：周文超（1988-），男，硕士研究生，Email: zhou_wenchao@126.com。

通讯作者：黄鹏（1974-），男，副研究员，博导，

Email: huangtju@tongji.edu.cn。

Wind-induced response analysis of a lattice tower under typhoon impact

Zhou Wenchao, Huang Peng, Gu Ming

(State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Absract: Damages of lattice tower under typhoon are very common. Compared to monsoon and other nolmal winds, typhoon has higher turbulence intensity, while the current structural design code does not consider this difference. When typhoon HAIKUI impacted Shanghai in 2012, wind speed time series at 10m, 20m, 30m and 40m and the part section wind-induced acceleration time series at 40m were recorded by the 40 m tall lattice steel tube tower which was built by Tongji University in Shanghai Pudong wind engineering research field. Based on the filed measured data, firstly, the variation of along-wind turbulence with mean wind speed is obtained. Then, the measured wind speed time sample are used as wind loading, and a time history analysis of the lattice steel tube tower are made using finite element software. Tt is shown that when mean wind speed is greater than 13m/s, the RMS of acceleration response in 4 measured height increase almost linearly with mean wind speed. Finally, according to the the numerical results, wind-induced vibration coefficients at different heights of the tower are calculated, which reached 1.36-1.65, which are approximate to the typhoon measurement result while greater than the value in current structural design code about 13%.

Keyword: lattice steel tube tower; typhoon HAIKUI; field measurement; wind-induced response; wind-induced vibration coefficient

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