混凝土徐变模式在梁桥预拱度设置中的比较

Comparison of the concrete creep model in the camber setting of the bridge

以南方某预应力混凝土连续刚构特大桥为项目背景,对混凝土徐变理论进行了阐述,着重分析比较了国内新旧桥规徐变计算模型的差别,并将其应用于该桥施工预拱度的计算中,结果表明,徐变对预应力混凝土连续刚构桥变形有重要影响,且不同徐变模式下计算结果差异大。

Based on the south of a long-span prestressed concrete continuous rigid frame bridge as the project background,the theory of concrete creep is described,focusing on analysis and comparison of creep computing model differences in the old and the new bridge norm,and applied to the calculation of the bridge construction camber.The results show that the creep of prestressed concrete continuous rigid frame bridge has an important impact on the deformation and creep under different calculation a big difference.