某曲线桥的静力极限承载性能分析与优化设计  

Research on static ultimate bearing capacity and optimal design for a curved girder bridge

作　　者：王元清[1] 邢继胜[1] 李运生[2] 

机构地区：[1]清华大学土木工程系,北京100084 [2]石家庄铁道学院桥梁工程系,河北石家庄050043

出　　处：《山东建筑大学学报》2009年第3期219-223,共5页Journal of Shandong Jianzhu University

摘　　要：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地应用于城市桥梁中,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。出于对建筑美观和安全等因素的考虑,该桥的设计较为保守,构件截面较大。采用了通用有限元软件ANSYS分析了该桥一个分联的极限承载能力,并对该分联进行了优化。优化结果表明:对于该钢—混凝土组合梁桥,跨高比最大可以取31.8,并满足静力承载要求。Steel-concrete composite structure has been finding more and more wide applications in urban bridges, for its advantage in reducing cross-section component size, ascendancy in improving stiffness, stability and integrity of structures and ductility of components and structures. Among all the steel and concrete composite structure styles, the combination of steel box girder with concrete deck is now widely adopted, And this style is chosen in building the cloverleaf junction of Beijing South Railway Station. Appearance, security and other factors of the building being considered, the original design of the bridge reflects conservative style with larger cross-section components. In this paper, the carrying capacity limit of one part of the bridge is analyzed in light of general-purpose finite element software ANSYS, and also the design of this part is optimized. The results indicate, for the steel-concrete composite girder bridge, the maximum span-height ratio can be 31.8, and this result meets the designing requirements of the bridge.

关 键 词：曲线桥 钢—混凝土组合结构 跨高比 有限元分析 优化设计 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]