高耸钢结构观光塔风致响应现场实测研究  

Field measurement research on wind-induced response of towering steel structure sightseeing tower

作　　者：张亚军 郑芳俊 张星魁 李宏武 路国运[1] 杨会伟[1] ZHANG Yajun;ZHENG Fangjun;ZHANG Xingkui;LI Hongwu;LU Guoyun;YANG Huiwei(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Construction Engineering Group Co.,Ltd.,Taiyuan 030024,China)

机构地区：[1]太原理工大学土木工程学院,太原030024 [2]山西建筑工程集团有限公司,太原030024

出　　处：《中国科技论文》2023年第8期827-833,共7页China Sciencepaper

基　　金：国家自然科学基金资助项目(12172244);山西省自然科学基金资助项目(201901D111089,202203021212256)。

摘　　要：为了评估高层建筑在服役期间的安全性能,将有限元方法与智能监测手段相结合,以北疆明珠塔为例研究高层建筑在风致响应作用下的动力特性。通过监测常态风作用下结构顶层处的振动速度等,利用快速傅里叶变换(fast Fourier transform,FFT)法识别结构固有频率,并分析了常态风对结构动力特性的影响。结果表明:北疆明珠塔结构在常态风作用下的振动幅值均小于相应规范限值,满足舒适度及设计标准要求;弯曲频率随速度幅值的增大而降低,而扭转频率与速度幅值的相关性较低;结构阻尼比与速度幅值的相关性较低。In order to evaluate the safety performance of high-rise buildings during service,finite element method and intelligent monitoring method were combined to study the dynamic characteristics of high-rise buildings under wind-induced response taking Beijiang Pearl tower as an example.By monitoring the vibration velocity at the top layer of the structure under the impact of normal wind,the natural frequency of the structure was identified by the fast Fourier transform(FFT)method,and the influence of normal wind on the dynamic characteristics of the structure was analyzed.The results show that the structure of the Beijiang Pearl tower exhibits less vibration amplitudes than the corresponding standard limits under normal wind,which meets the comfort and design standard requirements.The bending frequency decreases with the increase of the velocity amplitude,while the correlation between the torsional frequency and the velocity amplitude is low.The damping ratio of structure has low dependence on the velocity amplitude.

关 键 词：观光塔 风致振动 现场实测 快速傅里叶变换 参数识别 

分 类 号：TU391[建筑科学—结构工程]