考虑雷诺数效应的桥梁静风稳定分析

在综合考虑结构几何非线性和静风荷载非线性的基础上，引用大跨度桥梁非线性静风稳定分析理论，采用增量双重迭代搜索法对大跨度斜拉桥进行了非线性静风稳定分析，并编制了相应的计算程序。分别计算了苏通大桥在低、高雷诺数下的空气静力稳定性。对比计算结果发现，雷诺数效应对桥梁静风失稳临界风速有较大影响，高雷诺数下的静风失稳临界风速比低雷诺数的静风失稳临界风速低，并结合高、低雷诺数下三分力系数曲线形状差异，分析了在雷诺数效应下桥梁跨中断面侧向位移、竖向位移、转角响应随风速的变化。

Analysis of Static-wind Stability of Bridges with Consideration of Reynolds Number Effects

With comprehensive consideration of the nonlinearity of the structural geometry and static wind load,the nonlinear aerostatic stability theory for long-span bridges and the incremental double iteration method were used to analyze the nonlinear aerostatic stability for long-span cable-stayed bridges and the related calculation program was compiled.The critical aerostatic stability of Sutong Bridge with the Reynolds number effects was calculated by using the compiled program.The research indicates that Reynol...