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Key Techniques for the Main Navigable Bridge of the Main Passageway of Ningbo–Zhoushan Port

Key Techniques for the Main Navigable Bridge of the Main Passageway of Ningbo–Zhoushan Port
Auteur(s): , , ,
Présenté pendant IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022, publié dans , pp. 2064-2065
DOI: 10.2749/nanjing.2022.2064
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The main navigable bridge is a three-tower steel box girder cable-stayed bridge with a span of 78+187+2×550+187+78 m. The design reference wind speed is 42.3m/s. The main navigation span can naviga...
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Détails bibliographiques

Auteur(s): (Zhejiang Provincial Institute of Communications Planning, Design & Research CO., LTD., Hangzhou, China)
(Zhejiang Provincial Institute of Communications Planning, Design & Research CO., LTD., Hangzhou, China)
(China Communications Highway Planning and Design Institute Co., Ltd., Beijing, China)
(China Communications Highway Planning and Design Institute Co., Ltd., Beijing, China)
Médium: papier de conférence
Langue(s): anglais
Conférence: IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022
Publié dans:
Page(s): 2064-2065 Nombre total de pages (du PDF): 2
Page(s): 2064-2065
Nombre total de pages (du PDF): 2
DOI: 10.2749/nanjing.2022.2064
Abstrait:

The main navigable bridge is a three-tower steel box girder cable-stayed bridge with a span of 78+187+2×550+187+78 m. The design reference wind speed is 42.3m/s. The main navigation span can navigate 100,000-ton ships. In order to improve the overall stiffness of the bridge under unbalanced live loads, some measures are studied, such as the restraint conditions, the stiffness of the tower, the stiffness of the beam, the number of stay cables in the side and central tower, and so on. Through the wind tunnel test research, the control measures for the buffeting performance of the double cantilever are clarified. According to the IABSE vessel collision model, the vessel collision force is determined. A double-layer collision protection structure is used to protect the bridge and reduce vessel collision damage. In order to improve the structural durability, high- performance epoxy steel bars are used in the splash zone. The cable-anchor beams of the towers are made of weathering steel. Maintenance vehicles are installed in the main beam which is 1.63 km. Through the above measures, the structural performance is guaranteed.