高层建筑顶部悬挑飘板幕墙风振响应分析

Analysis of Wind-induced Vibration Response of the Cantilever Curtain Wall at the Top of High-rise Buildings

越来越多的高层建筑在其顶部设置了外形美观的悬挑飘板幕墙。采用频域内的风振响应谱分析方法,对高层建筑顶部悬挑平飘板幕墙简化模型的风振响应进行了分析。探讨了水平脉动风速谱、飘板所处高度和飘板刚度三个参数对其结构位移风振响应及风振系数的影响,以供实际工程设计参考。计算结果表明:不同风速谱计算所得风振响应相差较大,最大达到113.2%;风振系数相差较大,最大达到60.1%;不同飘板高度所得风振响应相差较大,最大达到80.0%。但风振系数相差不大,在17.0%之内。不同的刚度所得风振响应相差较大,最大达到22.5%,但风振系数相差不大,最大仅为1.5%。

In order to have a beautiful appearance, more and more cantilevered curtain wall are built at the top of high-rise buildings. This paper use wind power spectral analysis method in the frequency domain to analyze simplified model of cantilevered flat curtain wall at the top of high-rise building. Three parameters are used to investigate the influence of them on the wind-induced vibration response and wind-induced vibration factor of the cantilevered flat roofs, such as wind power spectrum of horizontal, height and stiffness, which can serve a reference for practical engineering design. The study results showed that the wind-induced vibration response calculated by the different power spectrum are obvious distinct with the maximum is 113.2% and the wind-induced vibration factor are also distinct with the maximum is 60. 1% ;the wind-induced vibration response calculated by the different height are obvious distinct with the maximum is 80.0% , but the wind-induced vibration factor are not distinct with the maximum is 17.0% ;the wind-induced vibration response calculated by the different stiffness are obvious distinct with the maximum is 22. 5% ,but the wind-induced vibration factor are not distinct with the maximum is 1.5%.