摘要
在香港K11大楼顶层布置了加速度传感器和风速仪,实时监测大楼周边风场及其风致振动。风场数值模拟以顶层实测台风风速数据为基础,结合台风经过时的风速剖面与湍流强度剖面,采用谐波叠加法模拟得到了该高层建筑16个代表楼层处较为真实的台风风场风速时程。分别采用基于数值风场数据的时域法和基于风洞试验数据的频域法对其进行了风振分析。结果表明:与频域法相比,时域法得到的结构风振加速度响应极值、均方根和功率谱密度均与实测结果更为接近。
A monitoring system with anemometers and accelerometers was deployed on the top floor of the K11 Building in Hong Kong for continuously recording the full-scale wind field and the dynamic responses of the structure. With the full-scale measurement data of wind velocity on the top floor, the typhoon velocity field around the building was numerically simulated at 16 representative floors by the weighted amplitude wave superposition method （WAWS） combined with the theoretical typhoon profiles of mean velocity and turbulence intensity. Wind-induced vibration analysis of the building was carried out both in time domain method based on the numerical wind field and in frequency domain method based on the wind tunnel test. The results show that the acceleration responses in terms of the extreme values, standard derivations and power spectrum density functions, obtained by the time domain method are more close to the full-scale measurement response results compared with those by the frequency domain method.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2016年第12期1-9,共9页
Journal of Building Structures
基金
国家自然科学基金项目(51578504)
关键词
高层建筑
原型实测
风场模拟
风振响应
tall building
full-scale measurement
wind field simulation
wind-induced vibration response
