无碴轨道混凝土桥梁的徐变变形研究

Analysis of Creep Deformation of Concrete Bridge with Ballastless Track

对高速铁路无碴轨道混凝土桥梁徐变效应的分析理论进行了深入的研究,提出了适用于混凝土桥梁徐变变形的计算方法。运用该方法可以跟踪模拟桥梁在整个施工及投入运营后任意时刻的结构变形,便于在施工时合理确定二期恒载的施加时间,为我国无碴轨道混凝土桥梁的工程实践提供依据。

The analytical theory of creep effect on high-speed railway ballastless track concrete bridge is analyzed deeply and a calculation method is put forward. This method is applicable to in computation of the creep deformation in concrete bridge, by which the deformations of the bridge can be followed up at any period of time during the whole construction sequences and in its using course, thus the reasonable time for exerting the second period external load can be determined, which provides basis for the engineering practice of ballastless track concrete bridge in our country.