基于线性滤波法的超高层建筑脉动风速时程模拟  

Time History Simulation of Wind Pulsation in Super Tall Buildings Based on Linear Filtering Method

作　　者：常乐 郭小飞 CHANG Le;GUO Xiaofei(China Academy of Building Research,Beijing 100013,China;Civil Engineering College,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《工程质量》2020年第11期76-81,共6页Construction Quality

基　　金：国家重点研发计划(2017YFC0806100)。

摘　　要：根据自然风的基本特性,以某超高层建筑结构为工程研究背景,采用线性滤波法中的AR模型模拟生成作用于结构上各个节点的脉动风速时程,通过对比模拟得到的脉动风速谱和空间相关函数与目标值吻合程度,结果表明:AR模型模拟超高层建筑结构的脉动风速效果较好,模拟精度较高。模拟出的各节点之间的脉动风速空间相关性曲线与采用的理论模型相关曲线在较低频率处吻合度很好。This paper introduces the basic characteristics of natural wind to a super-high building structure as engineering background,using the linear filtering method of AR model simulation to generate the various nodes of fluctuating wind acting on the structure,by comparing the simulation of fluctuating wind speed spectrum and spatial correlation function and the degree of the target coincide,the results showed that the AR model to simulate the fluctuating wind effect of high-rise building structure,simulation precision is higher.The simulated spatial correlation curve of pulsation wind speed between nodes is in good agreement with the theoretical model at lower frequencies.

关 键 词：超高层建筑 线性滤波法 AR模型 脉动风速时程 

分 类 号：TU973.213[建筑科学—结构工程]