新广州火车站大跨屋盖结构风振响应及等效静力风荷载研究

Research on wind-induced response and equivalent static wind load of New Guangzhou Railway Station

以刚性模型测压风洞试验得到的屋盖风压数据作为随机激励输入,采用线性系统随机振动的模态叠加法,分析了新广州火车站大跨屋盖和无柱站台雨棚结构的风振响应,并通过CQC方法考虑了高阶模态和模态间耦合的效应。在此基础上,利用阵风因子法计算得到不同重现期下的等效静力风荷载,并在结构设计中成功运用。

Taking the wind pressures measured in wind tunnel test as the random input,wind-induced structural dynamic responses on large-span roof structure of New Guangzhou Railway Station were calculated with the linear system stochastic vibration analysis methodology,and the effects of high frequency model and model coupling were considered by using the CQC method.Based on the results of analysis,the equivalent static wind loads（ESWL） on the roof structure were estimated according to the gust load factor（GLF） method for reference wind velocities with variety return period,and used in the structural design of the project.