基于风洞试验的升力系数对桥梁气动性能的评价

文章对虎门二桥主梁的3个不同方案进行了风洞试验,提出了仅由静风状态下测出的升力系数可作为初步判定悬索桥主梁选择优劣的标准,通过成桥状态阶段模型测振实验测出颤振临界风速,并比较了3个方案颤振临界风速大小,探明了升力系数能综合反映桥梁气动性能这一理论的正确性。

Evaluation on Bridge Aerodynamic Performance by Lift Coefficient Based on Wind Tunnel Test

The lift coefficient measured in aerostatic conditions can be used as a preliminary decision standard for suspension bridge girder selection, which is presented through the wind tunnel test of the three different girds of the Humen II bridge in this paper. Then the flutter critical wind speed of the three different girders of the fulfilled bridge condition through the section model vibration experiment are compared. The reasuhs shows that aerodynamic performance of cable-stayed bridge can be comprehensively reflected by the lift coefficient.