摘要
以岳阳华容县注滋口大桥为例,对先简支后连续桥梁结构在施工及运营各阶段混凝土徐变对结构受力变形的影响进行了较详细的分析。分析了持荷时间、混凝土龄期、后期预应力筋长度、加载龄期等参数的影响,并根据分析结果对该类型桥梁的设计提出了相应的改进方案。
Taking Zhuzikou Bridge in Huarong County, Yueyang City for example, this paper analyzes in considerable details the effect of concrete creep upon the internal force and deformation of the structure during construction and service period of the simply supportedtocontinuous bridge, in which the parameters such as loading duration, concrete ages, laterperiod length of prestressing tendons and loading ages of concrete are considered, and also proposes the corresponding improvements to the design of such type of bridge structure in accordance with the analytical results obtained therefrom.
出处
《桥梁建设》
EI
CSCD
北大核心
2003年第4期19-22,共4页
Bridge Construction
关键词
连续梁
先简支后连续体系
徐变
内力
变形
continuous girder
simply supported-to-continuous system
creep
internal force
deformation