摘要
某桥梁采用预应力混凝土Y型钢构-连续组合箱梁,采用悬臂浇筑施工,Y型墩钢构段箱梁根部梁高3.8m,跨中梁高1.8m,通过分析Y墩墩身刚度增大和墩身结构的内力对应关系,得出在施加顶推力后能很好地改善桥梁结构因Y墩承台提高对桥梁造成的负面影响,可为相似工程提供借鉴。
A bridge is made of Y-shaped continuous prestressed concrete-steel composite box beam which is constructed by using cantilever pouring method. The height of box beam root at Y-shaped pier steel structure segment is 3.8m and midspan beam height is 1.8m. After analysis on the relation between rigidity increase and internal force of Y-shaped pier body, it is found .that jacking force could effectively alleviate the negative influence of lifting of Y-shaped pier cap on bridge structure. Valuable references are provided for similar projects.
出处
《建筑技术开发》
2014年第5期4-6,共3页
Building Technology Development
关键词
预应力
钢构
组合箱梁
刚度
顶推
桥梁
prestressing
steel structure
composite box beam
rigidity
jacking
bridge
