混凝土箱梁桥施工阶段收缩应力及开裂现象分析  

作　　者：曹旭华[1] 黄龙田[1] 

机构地区：[1]广东省建筑设计研究院

出　　处：《中外建筑》2003年第5期84-87,共4页Chinese & Overseas Architecture

摘　　要：本文利用空间有限元程序,分别计算了采用先浇顶板、顶板分段浇注、整体分段浇注三种施工方案时,一座混凝土箱梁桥施工阶段的收缩应力,结果表明,顶板分段浇注是其中较合理的方法。此外,本文讨论了混凝土开裂现象产生的原因,并提出一些防治措施。本文分析结果可供同类桥梁设计及施工时参考。In this paper construction stage shrinkage stress of concrete box girders is analyzed by using the space finite-element program. The bridge is discussed according to three different construction methods which are pouring top plate first, dividing top plate into several parts and pouring, dividing the whole bridge into several parts and pouring. The result shows that the second method is more reasonable than others. The reasons of cracking and the methods of treatment are also discussed in this paper. The analysis results of this paper can be used as reference on the design and construction of the same kind of bridge.

关 键 词：混凝土箱梁桥 收缩应力 开裂 施工方法 浇注 

分 类 号：U445[建筑科学—桥梁与隧道工程]