等截面高耸烟囱涡激共振时风荷载的风力作用研究

Study on Wind Action Under Vortex-induced Resonance of Tall Chimneys with Constant Section

关于锁定区域范围的描述,不同参考文献存在显著的差异。同一类型地形结构发生涡激共振时,横向风向的等效风荷载在基本一致的情况下可能仍存在显著差异。依托实际工程案例,在分析锁定区及横风向等效风荷载的基础上对组合等效风荷载进行确定,结果发现,实例计算检查测试结果与规范之间存在较大差异。

There are significant differences in the description of the scope of the locked-in region among different references.When vortex-induced resonance occurs in the same type of terrain structure,the equivalent wind loads of the lateral wind direction may still be significantly different under the condition of basically the same.Based on the actual engineering case,the combined equivalent wind load is determined on the basis of the analysis of the equivalent wind load in the locking area and the crosswind direction.The results show that there are great differences between the test results of the example calculation and the specification.