首先，本文分析了桥梁成桥阶段应力。
Firstly, analyze the main girder stress in different stage in the paper.
对施工阶段、成桥阶段及运营阶段的弹性稳定性进行了分析。
The linear elastic stability of the bridge during the construction phase, completed bridge phase and operation phase are analysed.
另外，对稳定问题的研究多集中在成桥阶段，施工阶段的稳定问题研究不够深入。
In addition, the stability studies are almost related to completed bridge or its service stage, the issues of construction stability haven't been studied deeply.
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