飞云江特大桥预拱度计算及施工内力分析

Calculation of the Predetermined Camber and Analysis of Internal Stress in Feiyunjiang Bridge Construction

文章通过采用有限元方法,对飞云江特大桥主桥九跨预应力混凝土连续箱梁桥的悬臂浇筑施工进行了数值模拟分析,阐述了预拱度具体的计算方法,提出了计算挂篮弹性变形的简单实用的公式;同时,对施工过程中最大单T结构状态及Π结构状态的内力进行了对比分析,对于更好地进行桥梁施工具有很好的指导意义。

With FEM, numerical simulation analysis of cantilever casting of the continuous prestressed concrete box beam for Feiyunjiang Bridge （with nine spans） is made; calculating method for the predetermined camber is presented and the simple and practical formula for the calculation of distortion of form traveler is brought out; and the contrast analysis of the internal stresses in the maximum T-shape and Ⅱ-shape is made respectively; the measures adopted above will have guidance value for the practical bridge construction.