影响连续刚构桥收缩与徐变效应的参数分析

Analysis on the Parameters Affecting the Shrinkage and Creep Effect of Continuous Rigid Frame Bridge

针对预应力混凝土连续刚构桥施工与运营过程中复杂的收缩徐变效应,文章结合实际工程实例,采用有限元仿真分析方法,对连续刚构桥混凝土收缩、徐变效应受环境相对湿度、加载龄期与运营时间的影响进行了分析。结果表明,环境相对湿度与桥梁运营时间对连续刚构桥混凝土收缩、徐变效应的影响较大,加载龄期对连续刚构桥混凝土收缩、徐变效应的影响可以忽略不计。文章研究结论可供同类桥型的设计与施工参考。

For the complex shrinkage and creep effects in the construction and operation process of prestressed concrete continuous rigid frame bridge,combined with practical engineering examples,this article used the finite element simulation analysis method to analyze the influence of relative ambient humidity,loading age and operation hours on the concrete shrinkage and creep effect of continuous rigid frame bridge.The results showed that the relative ambient humidity and bridge operating hours have greater impact on the concrete shrinkage and creep effect of continuous rigid frame bridge,while the impact of loading age on concrete shrinkage and creep effect of continuous rigid frame bridge is negli-gible.The research findings of this article can provide the reference for the design and construction of similar bridges.