摘要
基于Davenport脉动风速谱,并考虑竖向相关性、平稳性的多变量随机过程,采用经过快速傅里叶变换算法改进的谐波叠加法对高层建筑结构进行脉动风速时程模拟,生成具有随机性的脉动风速时程曲线和风速功率谱密度函数。以76层306 m高钢筋混凝土结构风振Benchmark模型为研究对象,通过改进的谐波叠加法得出了结构在模拟脉动风荷载作用下的被动TMD控制和主动LQG控制的控制结果。研究结果表明:经过快速傅里叶变换算法改进的谐波叠加法具有很高的计算精度和效率。
Based on the weighted amplitude wave superposition（WAWS） method improved by fast Fourier transform（FFT） algorithm,the time history curves of stochastic fluctuating wind velocity and power spectrum density function were simulated by using the Davenport wind velocity spectrums and considering vertical correlation,stationary multivariate stochastic process.A 76-story 306 m reinforced concrete structure of Benchmark vibration model was studied.The numerical results of the dynamic response of the structure passive TMD control and active LQG control under simulation fluctuating wind loads were given.Research results show that the weighted amplitude wave superposition method improved by fast Fourier transform algorithm has good calculated accuracy and efficiency.
出处
《建筑科学与工程学报》
CAS
2011年第2期32-37,共6页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(10572046)
关键词
脉动风
随机风速场
谐波叠加法
数值模拟
高层建筑
风振控制
fluctuating wind
stochastic wind velocity field
weighted amplitude wave superposition method
numerical simulation
high-rise building
wind vibration control
