摘要
Abstract
During construction control for long span pre-stressed concrete bridge, stress monitoring on the main gird is the main method to ensure the construction security and the consistency between the finished bridge's stress and the design stress. The theoretical stress of the main girder can better accord with the actual stress by considering the shear lag effects. The finite element theory considering two shear lag freedom degrees per joints was applied during construction control in a cable-stayed bridge. Practice proves that the result based on this theory can be better accordance with the actual result. Carrying out the research on the shear lag effects not only can enrich the shear lag theory application but also can perform more accurately the monitoring and controlling for the main gird of the bridge during long span pre-stressed concrete bridge construction.关键词
预应力混凝土/斜拉桥/施工控制/剪力滞效应/应力监测Key words
pre-stressed concrete/cable-stayed bridge/construction control/shear lag effect/stress monitoring分类
交通工程
