An Aerostatic Stability Method for Long-Span Bridges Considering Geometrical, Material and Static Wind Load Nonlinearities
Cheng Jin(1), Jiang Jianjing(1), Xiao Rucheng(2), Xiang Haifan
(1 Department of Civil Engineering, Tsinghua University, Beijing,100084)
(2 Department of Bridge Engineering, Tongji University, Shanghai, 200092)

Abstract: 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 pr ocedure. Finally, the effects of geometrical nonlinearity, material nonlinearity and static wind load nonlinearity on the aerostatic stability for long-span b ridges are analyzed. 
Keywords: Long-span bridges, geometrical nonlinearity, material nonlinearity, static wind load nonlinearity, aerostatic stability.