李  莉，  舒赣平
    （东南大学土木工程学院，南京210096）

[摘要] 采用空间有限元方法，结合具体工程对小曲率半径钢箱梁桥进行研究，对比分析其不同截面形式下的受力特性，并对曲线钢箱梁桥的受力特点、剪力滞效应和最优截面方案进行探讨。分析表明：对于大跨度薄腹钢箱梁桥，增设横隔板和必要的纵肋是减小截面畸变变形的最优方案。同时，对于此类曲线桥应重视必要的抗扭支座设置。
[关键词] 钢箱梁；曲线桥；有限元；横隔板；正应力
中图分类号：U448.11    文献标识码：A  文章编号：1002-848X(2011) S2-0244-05

    Design and study on curved steel box girder bridge of small radius
    Li Li, Shu Ganping
    (Department of Civil Engineering, Southeast University, Nanjing 210096, China)

Abstract: Curved steel box girder bridge of small radius were studied by a specific project. Using the method of finite element, the mecharucal properties of curved steel box girder bridge with different section type were compared, and the shear lag effect and the best choice of section of steel box girder bridge were analyzed. The results show that for large-span steel box girder bridge with slender web, using cross spacer and necessary longitudinal rib is the most efficient way to reduce distortion of the section. Meanwhile, it is important to use torsional bearings when necessary.
Keywords: steel box girder; curved bridge; fuute element; cross spacer; normal stress