基于改进线性滤波法的某超高层建筑风振反应分析  

Study on wind-induced response of a super tall building based on linear filtering method

作　　者：汪大洋[1] 袁玲[1] 周云[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2013年第3期21-24,共4页Journal of Guangzhou University:Natural Science Edition

基　　金：广东省自然科学基金资助项目(S2012040007215);中国博士后科学基金第52批资助项目(2012M521604);广东省教育厅科研资助项目(2012LYM_0104)

摘　　要：采用离散傅立叶变换和快速傅立叶变换技术对传统线性滤波法的自相关Toeplitz矩阵进行了改进,提出了改进的线性滤波法.考虑结构空间相关特性,基于改进的线性滤波法模拟研究了高层结构的顺风向和横风向脉动风荷载,并对高层结构的风致振动响应进行了分析研究.结果表明,改进的线性滤波法不仅能保证计算结果的精度和计算效率,而且采用该改进方法得到的脉动风荷载时程能有效计算高层结构的风致振动响应,有利于工程设计人员精确掌握结构风致振动特性.The along-and cross-wind multi-nodal fluctuating wind speed time series of high-rise buildings are simulated by improved linear filtering method considering spatial correction characteristics. Calculation method of auto-correlation Toeplitz matrix is improved by discrete Fourier transform （DFT） and fast Fourier transform （FFT）. Wind-induced vibration responses of a super-tall building are studied by the improved linear filtering method. The results show that fluctuating wind-load time series of tall buildings can be simulated by the im- proved method and high computational efficiency and accuracy can also be ensured. Dynamic responses of tall building can be calculated using time-domain analysis.

关 键 词：超高层结构 线性滤波法 风振反应 脉动风速谱 空间相关性 

分 类 号：TU973.23[建筑科学—结构工程]