宁波新典桥的技术特色与受力分析

Technical Characteristics and Stress Analysis of Xindian Bridge in Ningbo

摘要:

宁波新典桥主桥是一座跨径为213 m的简支下承式钢箱系杆拱桥，位于宁波城市核心区，跨越奉化江，是城市主干道的重要组成部分。梳理了新典桥主桥所采用的步履式拱梁整体顶推施工方案的关键技术与创新点，总结了ECO铺装技术对钢桥面耐久性的积极效应，为相似桥梁建造提供了宝贵经验。对比了合理拱轴线与景观拱轴线的受力区别，认为在进行景观拱桥设计时，拱轴线是否合理对其经济性影响有限。此外，还对景观悬挑步道及复杂拱梁结合段进行受力和构造解析，为景观桥梁的设计提供了有效参照。

Abstract:

Ningbo Xindian Bridge is a simple-supported through steel box bowstring arch bridge with a span of 213 meters. It is located in the core urban area of Ningbo, spans the Fenghua River and is an important part of the urban trunk road. The key technologies and innovative points of the overall incremental launching construction scheme of the walking arch beam used in the main bridge of Xindian Bridge are sorted out. The positive effects of ECO paving technology on the durability of steel bridge decks are summarized. The valuable experience is provided for the construction of similar bridges. By comparing the force differences between a reasonable arch axis and a landscape arch axis, it is believed that whether the arch axis is reasonable has a limited impact on its economy in the design of landscape arch bridge. In addition, the stress and structural analysis are conducted on the connected section of landscape cantilever walkway and complex arch beam, which provides the effective reference for the design of landscape bridges.