几何非线性对斜拉索悬挑屋盖风激动力响应的影响

Effect of Geometrical Nonlinearity on Wind Induced Response of Cable Stayed Cantilevered Roof of Stadium

用风洞实验和M on te Carlo模拟两种方法,形成某体育场屋盖面上的脉动风压场,并运用有限元软件平台ANSYS,在时域内对屋盖线性和两种非线性模型的斜拉索轴力、风激动位移和应力进行比较,得到在分析预应力斜拉索悬挑屋盖风振动力响应时应考虑几何非线性的影响及一些有参考价值的结论.

In the paper we gained the fluctuating wind pressure field on the roof of Yiyang stadium by wind tunnel test and Monte Carlo method. With the help of finite element software ANSYS,we analyzed one linear roof model and two nonlinear roof models in time domain and compared the axial force of cables, wind induced dynamic displacement and stress of different models. We conclude that the effect of geometrical nonlinearity of cable stayed cantilevered roof should be considered when analyzing the wind induced dynamic response and some valuable conclusions.