青岛海湾大桥大沽河航道桥静风稳定性分析

Aerostatic Stability Analysis of Qingdao Gulf Bridge-Daguhe Channel Bridge

大沽河航道桥(独塔自锚式钢箱梁悬索桥)是青岛海湾大桥的主通航孔桥,为确保大桥在施工阶段全桥合拢状态和建成运营后的抗风稳定性、安全性和适用性,对其主梁进行了静风稳定性分析.对主梁节段模型进行静力三分力风洞试验,采用ANSYS软件求解其动力特性,最后求解主梁静风扭转发散临界风速和横向屈曲临界风速,计算结果均远大于相应的检验风速,因而大沽河航道桥主梁的空气静力稳定性能够得到足够的保证.

Daguhe Channel Bridge is the main navigation of Qingdao Gulf Bridge,and it is a single tower self-anchored steel box girder suspension bridge.The paper aims at steel box girder＇aerostatic stability analysis to ensure the stability of the wind-resistance,safety and applicability in the state of the construction phase full-bridge close up and operation of the bridge,using ANSYS for the analysis of dynamic behavior,the coeficient of tri-component force of segmental model of the girder is measured by wind tunnel test,and then to solve its critical wind velocity of static torsional divergence and transverse buckling critical wind speed,calculate results were much larger than the corresponding wind speed tests,which guarantee steel box girder＇aerostatics stability in Daguhe Channel Bridge.