大跨径小半径曲线桥梁转体结构设计

Design of Rotating Structure of Long-span Small-radius Curved Bridge

摘要:

以宁波市轨道交通4号线工程跨铁路桥为例，阐述了大跨径小半径曲线转体桥转体结构的设计要点和应对此类桥梁上部结构恒载横向偏心的处理方法。通过Midas软件建模，计算分析了转体结构悬浇阶段的抗倾覆稳定性随悬浇节段的变化规律，并对转体阶段的结构稳定性计算进行了探讨。

Abstract:

Taking a bridge spanning railway of Ningbo Metro Line 4 Project as an example, the design essentials of the rotating structure of long-span small-radius curved bridge and the treatment method to deal with the dead load lateral eccentricity of this bridge superstructure are expounded. The change rule of anti-overturning stability in the suspension casting stage of rotating structure is calculated and analyzed with the suspension casting segment. The calculation of structural stability in the rotating stage is discussed.