悬臂施工周期对PC连续梁桥成桥后徐变效应的影响分析

PC连续梁桥常采用悬臂浇注的方法施工。由于受各种因素的影响,使其节段施工的周期会存在一定差异,从而影响成桥后梁体的徐变效应。本文结合一座铁路连续梁桥的施工过程,通过有限元建模分析探讨了悬臂施工节段的施工周期对连续梁桥成桥后徐变效应的影响,得出对于连续梁施工具有参考意义的几点结论。

Prestressed concrete continuous beam bridge often adopt cantilever casting method. As the result of many factors, the segmental construction cycle will be difference, thus affecting the bridge girder creep effect. Combination of two railway continuous beam bridge construction process, through the finite element modeling of cantilever segmental construction of continuous beam with different construction period analysis creep effect after the bridge finished, then some meaningful conclusions for the construction of continuous beam are drawn.