甬舟铁路桃夭门大桥方案研究与设计

甬舟铁路桃夭门大桥跨越桃夭门水道,根据线形、技术、经济条件比选,最终确定采用经富翅岛与公路桥并行方案,主桥与公路桥对孔布置,一跨跨越通航水域。并对钢-混结合梁斜拉桥和钢桁梁斜拉桥进行多方面比选,推荐采用钢-混结合梁斜拉桥方案,通过对结构进行静力分析、车-桥及风-车-桥耦合振动分析,验证结构的安全性和舒适性。研究结果表明钢-混结合梁斜拉桥适用于高铁桥梁。该桥型将首次应用于高速铁路,将为我国铁路桥梁的设计研究提供借鉴和新思路。

The Research and Design of Taoyaomen Bridge on Ningbo-Zhoushan Railway

Taoyaomen bridge on Ningbo-Zhoushan Railway spans Taoyaomen Waterway. According to the comparison of the linear,technological and economic conditions,the bridge scheme is finally determined to cross Fuchi island and run parallel to the highway bridge. The main bridge is arranged with its aperture in line with that of the highway bridge and crosses the navigable waterway by one span. The multiaspect comparison of the steel-concrete composite beam cable stayed bridge with the steel truss cable-stayed bridge recommends the former and its safety and comfort are verified through static analysis of the structure and the analysis of wind-vehicle-bridge system coupling vibration. The research results show that the steel-concrete composite beam cable stayed bridge is suitable for high speed railway. This type of bridge will be employed the first time on high speed railway and may provide reference and new concept for railway bridge design.