曲线箱梁桥预应力作用的仿真分析

Simulation Analysis of the Prestressing Effect on the Curved Box Girder Bridge

为降低曲线箱梁桥由于内外腹板曲率半径的差异而导致的设计复杂性 ,以一座实际的曲线箱梁桥为对象 ,采用空间实体仿真分析模型进行分析 ,并将结果与工程实测值进行对比 ,发现若按直线箱梁桥方式设计曲线PC箱梁桥 ,会造成对称布束的受力不合理 .文中对预应力布束的调整方法进行了探讨 ,以为曲线箱梁桥的设计提供参考 .

In order to reduce the complexity arising from the difference in camber radius o f the internal and external webs in the design of curved box girder bridges, a r eal curved box girder bridge was analyzed by using the space entity simulation m odel. By comparing the analytical results with the measured ones, it is found th at unreasonable loading will occur in the symmetrical prestressing tendons if th e straight box girder is irrational. A method to dispose the prestressing bunch was finally investigated, thus providing references to the design of curved box girder bridges.