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
张亚军 路国运 张星魁 郑芳俊 杨会伟 李宏武
作者信息
摘要
为了评估高层建筑在服役期间的安全性能，采用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。
Abstract
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Key words
sightseeing tower/wind-induced vibration/field measurement/fast Fourier transform/parameter identification引用本文复制引用
张亚军,路国运,张星魁,郑芳俊,杨会伟,李宏武.高耸钢结构观光塔风致响应现场实测研究[EB/OL].(2023-07-31)[2026-04-05].http://www.paper.edu.cn/releasepaper/content/202307-56.学科分类
建筑基础科学/建筑结构/高层建筑
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