基于MIDAS分析不同交通荷载作用下 钢桥面桥面系最不利状态截断面研究

Study on the most unfavorable section of steel bridge deck under different traffic loads based on MIDAS

为研究虎门二桥桥面系最不利状态截断位置和受力状态,采用Midas三维有限元软件,建立有限元模型,把悬索桥简化为空间杆系结构进行桥梁结构整体性计算,采用双向8车道布置汽车—超20级车队。结果表明:位移形变最大的点位于主桥39号索下;主跨挠度最大的位置其扰度的三维模拟计算分析结果达到471.791 cm;在偏载车队荷载下桥塔根部处的桥面板为最不利位置。

In order to study the most unfavorable state truncation position and stress state of the Humen second bridge deck,the finite element model is established by using Midas three-dimensional finite element software,and the suspension bridge is simplified into a space bar structure for the overall calculation of the bridge structure.The car is arranged in the lane-the super 20 team.The results show that the point with the largest displacement deformation is located under the No.39 cable of the main bridge;the maximum deflection of the main span of the deflection curve is 471.791 cm;the bridge deck at the root of the pylon under the load of the eccentric load of the Nizhou suspension bridge is the most unfavorable position.