大跨径预应力混凝土刚构桥施工过程稳定性研究

摘要

This paper takes a pre-stressed concrete rigid-frame bridge,with(50 + 80 + 80 + 50)m span,as engineering background. According to the construction technology,the finite element model during construction was established by MIDAS software. Based on the first kind of stabili-ty analysis theory,the elastic stability of the bridge was researched and the elastic stability safety coefficient was calculated in each construction stage.%以某（50+80+80+50）m 四跨预应力混凝土刚构桥为工程背景，依据实际施工工艺，采用 MIDAS 有限元分析软件建立了该桥施工阶段空间有限元分析模型，基于结构第一类稳定分析理论，研究了该桥各施工阶段结构的弹性稳定性，并计算求解了各施工阶段结构的弹性稳定安全系数。