机构地区: 清华大学
出 处: 《应用力学学报》 2002年第4期117-121,共5页
摘 要: 针对现有的桥梁静风稳定分析方法中存在的问题 ,提出了增量与内外两重迭代相结合的新方法 ,并且考虑了结构几何、材料和静风荷载非线性。在上述方法的基础上 ,编制了桥梁非线性空气静力稳定分析程序BNAP ,并进行了相应的算例分析 ,所得结果表明该方法具有计算稳定和速度快的优点。最后 ,以一座主跨 10 0 0米的斜拉桥为例 ,分析了结构几何非线性、材料非线性和静风荷载非线性对大跨径桥梁空气静力稳定性的影响。 A new method is proposed in this paper, in which incremental procedure and inner outer iterative algorithm are included. And structural geometrical, material and static wind load nonlinearities are considered. Based on the method mentioned above, a nonlinear aerostatic stability analysis programme is developed. This method has the advantages of stable calculation and fast computation procedure. Finally, the effects of geometrical nonlinearity, material nonlinearity and static wind load nonlinearity on the aerostatic stability for long span bridges are analyzed.