预应力混凝土连续曲线箱梁预应力效应分析

曲线箱形梁桥是空间复杂受力结构体系,预应力钢束产生的径向分布力是预应力混凝土曲线箱梁产生扭矩的主要原因之一。采用组合有限元法和简化方法分析曲线箱梁中预应力所产生的效应,得出预应力作用产生的内力和变形的变化趋势,为进一步完善曲线预应力混凝土箱梁桥的设计提供了依据。

Analysis of Prestressing Effect for Prestressed Concrete Continuous Curved Box Girders

Curved box girder bridge is a complicated spatial stress structural system.The radial stress distribution produced from the prestressed steel beam is one of the main reasons to cause the torsion of prestressed concrete curved box girder.The application of the combined finite element method and simplified method can analyzes the effect produced by the prestressing in the curved box girder so as to achieve the internal force produced by the prestressing action and the varying tendency of deformation,which can provide the basis for further perfecting the design of curved prestressed concrete box girder bridges.