摘要
为了研究高层建筑的振动问题,以东南大学逸夫建筑馆为例,采用信号的时域和频域分析方法,推测出地铁运行引起的地表振动和风激励为影响其振动的主要因素。采用功率谱分别对地铁运行上方地表的加速度数据和高层顶部的风速风向数据进行处理,提取出地表振动低频分量和风载影响高层振动的频段,并验证了该建筑振动的主要因素为地铁引起的地表振动和风激励。将两种实测数据经小波分析和FIR带通滤波处理后的最大振动作为仿真模型输入源,对目标高层建筑受环境激励产生的振动响应进行物理仿真,与实测数据对比验证了该仿真方案的可行性,并预测:当地铁引起的地表振动与1级风的影响达到最大时,该建筑物的最大振幅为0.1 mm。
In order to study the vibration problem of high-rise building,taking Yifu building hall of southeast university as an example,the time domain and frequency domain analysis methods of signal are adopted to speculate that the ground surface vibration caused by subway operation and wind excitation are the main factors affecting the vibration.The power spectrum is used to process the acceleration data of the ground above subway operation and the wind speed and direction data of the top of high-rise building.The low-frequency components of the surface vibration and wind excitation vibration frequency are extracted,which verifies that the subway operation and wind excitation are the main factors affecting the vibration of the high-rise building.The maximum vibration of two measured data after wavelet analysis and FIR bandpass filtering is taken as the input source of designed simulation model separately to conduct physical simulation of the vibration response generated by environmental excitation of the target high-rise building.It is proved that the simulation scheme is feasible compared with the measured data,and predicted that:when the ground surface vibration caused by subway and the influence of the 1-level wind are both maximum,the maximum amplitude of the building is 0.1 mm.
作者
刘芬
王庆
阳媛
徐文杰
LIU Fen;WANG Qing;YANG Yuan;XU Wenjie(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China)
出处
《传感器与微系统》
CSCD
2020年第12期36-39,共4页
Transducer and Microsystem Technologies
关键词
加速度计
振动监测
小波分析
功率谱
accelerometer
vibration monitoring
wavelet analysis
power spectrum
