摘要
根据日本规范中提出的横风向脉动风力谱系数函数,利用人工模拟横风向脉动风压时程的方法,提出了一个矩形高层建筑横风向风振反应时程的计算方法供参考。采用Newm ark法与W ilson-θ法计算了2栋建筑物顶部的横风向风振反应。计算结果表明,在横风向脉动风压的作用下,结构的风振反应以共振响应为主,非共振响应仅为次要的部分;这与谱分析法得出的结论是一致的;从而说明了计算结果的正确性。这对于正确估算结构的风振反应值,为高层建筑风振控制措施设计提供参考依据是有一定意义的。
A method for evaluating wind induced vibration in the across wind direction on rectangle high rise buildings has been presented in this paper with simulation of the process of wind pressure fluctuation. In the computation approach, the fluctuating pressure in the across wind direction have been simulated according to the fluctuating pressure spectrum density function specified in the Japanese building code. Evaluation work has been done for a 68m building and a 180m building with step by step method （ the Newmark method and the Wilson-θ method） and the results show that the resonant response take the significant part of the total dynamic response, the same conclusion as in the case of spectrum analysis. The conclusion could be used as a reference for wind vibration control design.
出处
《四川建筑科学研究》
北大核心
2006年第4期26-30,49,共6页
Sichuan Building Science
关键词
脉动风压
谱密度函数
湍流
加速度
相位差
fluctuating pressure
spectral density function
turbulence
acceleration
phase angle
