大跨度钢管混凝土拱桥的非线性空气静力稳定性

Nonlinear Aerostatic Stability of Long-Span Concrete-Filled Steel-Tube Arch Bridge

同时考虑静风荷载非线性和结构几何非线性的影响,运用增量迭代法分析了大跨度钢管混凝土拱桥成桥状态下的非线性空气静力稳定性,编制了相应的计算程序,并结合一座主跨为368m的钢管砼拱桥———茅草街大桥进行了计算,讨论了风荷载的非线性、风力的初始攻角、矢跨比、横撑设置等参数对大跨度钢管混凝土拱桥侧向稳定性的影响.

The analysis for the aerostatic stability of the long-span concrete-filled steel-tube arch bridge, with an increment iteration approach is presented. The nonlinear effects of the aerostatic load and the structural geometry are considered in the analysis, and a computing procedure is then developed. By analyzing the aerostatic stability of the Maocaojie Bridge with a main span of 368m, the effects of the parameters such as the nonlinearity of the aerostatic load,initial attack angle and the rise-span ratio and lateral bracing on the lateral aerostatic stability of long-span concrete-filled steel-tube arch bridges are finally discussed.