预应力混凝土连续刚构桥中跨合龙段配重方法探讨

Discussion on Mid-span Closure Segment Ballasting Methods for Prestressed Concrete Continuous Rigid Frame Bridge

针对连续刚构桥中跨合龙段配重展开研究,阐述了配重的作用,讨论了基本配重的方法。根据实际经验提出了"等重量配重法"、"等弯矩配重法"及"等位移配重法"三个概念,并结合依托项目,仔细研究三种配重方式对桥梁变形、成桥应力及线形等的影响。

Authors researched mid-span closure segment ballasting methods for prestressed concrete continuous rigid frame bridge, aiming to expatiat the functions of ballasting and discuss the methods of basic ballasting. Concepts of the ballasting methed of equal weight, of equal bending moment and of equal motion are proposed combinning with actual experiences. Combining with practical engineering, authors carefully analyzed influences of three ballasting methods on the deformation, erected bridge stressing conditions and geometry.