良态风及台风不同风谱对结构风雨振反应对比分析

发布时间：2019-04-10 18:41

【摘要】：为了比较良态风及台风风场对结构风雨耦合作用的影响,利用良态风及台风风谱生成风雨荷载时程曲线进行时程反应分析。首先介绍了常用的良态风和台风的不同风谱以及雨荷载计算模型,采用谐波叠加法生成脉动风速以及风雨荷载时程曲线,将风雨荷载施加在输电塔上进行分析,得到了不同情况下的输电塔顶点加速度均方根。计算结果表明,在风单独作用下或风雨共同作用下,由台风风谱计算的输电塔顶点加速度均方根大于良态风风谱的计算结果,良态风下的风雨振加速度均方根增大百分比大于台风的计算结果,最大达到了24.43%。因此在台风登陆期间应重视台风的高湍流度和降雨对结构的撞击作用。
[Abstract]:In order to compare the effects of good wind and typhoon wind fields on wind-rain coupling, time-history response analysis of wind-rain loads was carried out by using wind-rain time-history curves generated by wind-wind and typhoon wind spectra. Firstly, the different wind spectrum and rain load calculation models of good wind and typhoon are introduced. The fluctuating wind speed and wind-rain load time-history curve are generated by harmonic superposition method, and the wind-rain load is applied to the transmission tower for analysis. The root mean square (RMS) of the peak acceleration of the transmission tower under different conditions is obtained. The results show that the root mean square (RMS) of the peak acceleration of the transmission tower calculated by typhoon wind spectrum is greater than that of the good wind spectrum under the action of wind alone or under the action of wind and rain. The increasing percentage of mean square root of wind-rain acceleration under good wind is higher than that of typhoon, and the maximum is 24.43%. Therefore, attention should be paid to the high turbulence of typhoon and the impact of rainfall on the structure during typhoon landing.
【作者单位】：大连理工大学建设工程学部;
【基金】：国家自然科学基金创新研究群体项目(51121005);国家自然科学基金重大国际合作项目(51261120375) 国家重点基础研究计划(973计划)(2011CB013605)
【分类号】：TU312.1

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