带转向机构HCA在杭州湾跨海大桥斜拉索减振中的应用

杭州湾跨海大桥北航道桥为主跨448m的钻石型双塔双空间索面钢箱梁斜拉桥,通航净空为47m,按双向六车道高速公路设计,设计时速100km/h。为改善行车安全性,国内首次在栏杆外侧设置了风障(高度从近塔4.27m至远塔3.4m),为了确保整桥隽秀的景观前提下开发了带转向机构的拉索减振器,对全桥拉索进行了理论分析和安装减振器后的实桥测试。

Application of belt steering mechanism HCA in vibration reduction of cable-stayed cables of Hangzhou Bay Bridge

Hangzhou Bay Beihang Bridge is a diamond-shaped double-tower double-space cable-plane steel box girder cable-stayed bridge with a main span of 448m, with a navigation clearance of 47m. It is designed according to a two-way six-lane expressway with a design speed of 100km/h. In order to improve driving safety, for the first time in China, a wind barrier is set outside the railing (from 4.27m near the tower to 3.4m far). In order to ensure the meaningful landscape of the whole bridge, a cable shock absorber with steering mechanism is developed. Theoretical analysis of the whole bridge cable is carried out and a real bridge test after installing the shock absorber is carried out.