某曲线钢-混凝土组合梁桥的静力性能分析

Research on Static Load Capacity for Curved Steel-Concrete Composite Girder Bridge

钢-混凝土组合结构由于具有减小构件截面尺寸,增加构件和结构的延性等优点被越来越广泛的应用于城市桥梁中,其中钢箱梁加混凝土桥面板的组合形式是现在应用很广泛的一种形式。北京南站进站立交作为北京南站改扩建工程的一部分,其结构形式为曲线型钢-混凝土组合梁。目前曲线型钢-混凝土组合型梁的计算理论尚不完善,需要采用专门的有限元软件进行分析,介绍了该桥的设计情况、技术特点,并且采用了通用有限元软件ANSYS静力计算模块分析了进站立交的其中一个分联的受力情况,并将分析结果与设计软件结果相比较,通过分析表明该分联的设计满足现行规范的要求。

Steel-concrete composite structure has been more and more widely used in urban bridges for its advantage in reducing components＇ cross-section and improving stiffness, stability and integrity of structures and ductility of components and structures, and its predominance in shortening the construction period as well. A- mong all the steel and concrete composite structure styles, the combination of steel box girder with concrete deck is now very widely used. And this style is chosen in building the cloverleaf junction of Beijing South Railway Station. This cloverleaf junction construction is a part of the Beijing South Railway Station expansion project, in which curve profile and steel-concrete constitution composite girder is used. At present, the calculation theory of curved steel-concrete composite beam is still incomplete, and analysis with the help of finite element software is required. This paper gives an introduction of this cloverleaf junction, and makes an finite element analysis of a member of this cloverleaf junction, which shows its design meets the regulation of the relevant standards.