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本文论述了分段施工的箱形梁桥上部结构设计应该考虑的事项。文中证明,所述的基本原则并不是以这种方式施工的结构所独有的。由于预施应力、恒载和活载产生的腹板弯矩、以及混凝土徐变引起的纵向弯矩重分布、乃是重要的设计项目。对于温度引起的应力与几种施工方法均作了简要的讨论。
This article discusses the design of the superstructure of box girder bridge which should be considered in construction. The paper proves that the basic principles described are not unique to the structures constructed in this way. Due to the prestress, load and live load generated by the web bending moment, as well as the longitudinal bending moment caused by concrete creep redistribution is an important design project. For temperature-induced stress and several construction methods are briefly discussed.