沪南公路跨线桥抖振响应数值分析研究

采用虚拟风洞技术与全桥结构三维有限元分析相结合的方法,对沪南公路跨线桥成桥状态下的典型断面静气动力系数进行了模拟,开展了脉动风场模拟,并结合模拟结果分析了全桥结构在抖振作用下的位移及内力响应。研究方法及相关结论对我国大跨径变截面连续梁桥的抗风设计具有一定的指导和借鉴意义。

Numerical Analysis and Study on Buffeting Response of Hunan Highway Flyover

The typical sectional static aerodynamic coefficients of Hunan Highway Flyover in the finished bridge state are simulated by using the method of combining the virtual wind tunnel technology and full-bridge structural 3D finite element analysis. The simulation of fluctuating wind field is carried out. And combined with the simulation results, the displacement and internal force response of the full-bridge structure under the buffeting action are analyzed. The study method and the relevant conclusion can be referred for the anti-wind design of long-span variable cross-section continuous girder bridges in China.