大跨预应力混凝土箱梁桥收缩徐变效应

Analysis on Shrinkage and Creep Effect of Long-span Prestressed Concrete Box Girder Bridge

随着大跨预应力混凝土梁桥的迅速发展,桥梁收缩和徐变影响的分析和计算成为结构设计人员越来越关心的问题,因此徐变计算理论和方法得到了不断发展．综述了徐变的各种分析方法,采用积分退化核方法对大跨预应力混凝土连续刚构桥进行了计算,得出了一些有意义的结论,可供桥梁设计参考．

With the rapid development of long-span prestressed concrete beam bridge, the analysis and calculating of shrinkage and creep influence on bridge concerned deeply by structural designers, therefore creep theory and calculating method obtained increasing development. This article summarized each creep analytical method, using integral degenerate check method to compute long-span prestressed concrete continuous frame bridge, some valuable conclusions were obtained, which could be useful considerations for bridge design.