悬索桥施工猫道的非线性抗风静力稳定性分析

Study on Nonlinear Wind Resisting Static Stability of Catwalk of Suspension Bridge

结合一中跨跨度为 96 0m的悬索桥施工猫道的抗风稳定性研究 ,提出了通过节段模型静力 3分力试验以获得静力 3分力系数 ,进而进行猫道静力稳定性的非线性计算分析的方法 ,同时进行了全模型风洞试验。比较非线性计算结果和全模型试验结果可知 。

By measuring the static aerodynamic coefficients of the three components of forces through section model test and taking into account the components of the displacementdependent wind load and geometric nonlinearity, the authors of this paper propose a nonlinear finite element method (FEM) to assess the static stability of catwalk of a suspension bridge with a middle span of 960 m. Meanwhile, a full model tunneltest of the catwalk is also performed. By comparing the displacements measured in the full model tunnel-test with the results obtained from the nonlinear FEM, it is shown that the nonlinear FEM can efficiently assess the stability of catwalks of suspension bridges as the full model test.