双幅桥面桥梁主梁断面的气动选型

Aerodynamic optimization of twin deck bridge girder’s cross Section

与常见的单幅桥面桥梁相比,双幅桥面桥梁主梁断面的气动选型更为严格,必须同时保证上下游两主梁断面都具有良好的气动性能。以某在建的双幅桥面桥梁为背景,通过一系列节段模型风洞试验,从主梁断面基本形状和检修车轨道的位置及高度两个方面进行了主梁断面的气动方案比选,对双幅桥面桥梁主梁断面的气动选型进行了初步研究。

Compared with common single deck bridge, the aerodynamic optimization of twin deck bridge girder’s cross section is stricter because both forward girder and leeward girder should be of good aerodynamic performances at the same time. Taking as an example a certain twin deck bridge which is under construction, a series of wind tunnel tests with different sectional models was performed to get the best girder cross section through aerodynamic optimization of the basic shape of girder cross section as well as the position and height of repairing-vehicle’s rail. This starts a preliminary study on cross section aerodynamic optimization of twin deck bridge girder.