港珠澳大桥的结构抗风性能

Wind resistance of the Hong Kong-Zhuhai-Macao Bridge

该文针对港珠澳大桥抗风设计面临的关键技术问题,对3座通航孔桥和深水区非通航孔桥,开展了常规节段模型、大比例尺节段模型、全桥气动弹性模型以及施工期桥塔自立状态气动弹性模型风洞试验。研究结果表明:港珠澳大桥原设计方案主梁存在颤振临界风速低、涡激振动振幅超限以及桥塔驰振等抗风问题。通过采用气动措施和机械措施,有效解决了港珠澳大桥的抗风问题,为大桥的抗风设计提供了科学依据和指导,确保了大桥的抗风安全和服役性能。

One key technical problem of the Hong Kong-Zhuhai-Macao Bridge is the structural response to high winds.This study included wind tunnel tests of a conventional sectional model,a large sectional model,a full-bridge aeroelastic model and a self-supporting aeroelastic tower model for three channel bridges and non-navigable bridges.The results indicate that the original design of the Hong Kong-Zhuhai-Macao Bridge may suffer from wind effects such as flutter,unacceptable vortex-induced vibrations and tower galloping.Aerodynamic and structural modifications are given to eliminate the wind problems of the Hong Kong-Zhuhai-Macao Bridge.This research provides guidance for guaranteeing the safety of the Kong-Zhuhai-Macao Bridge in high winds.