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结合工程实例,采用有限元方法对体外预应力钢箱梁桥的力学性能进行分析。使用3套软件分别建立模型,列出了钢箱梁主要控制截面的内力、应力、挠度和动力特性的计算结果,并对其进行了讨论。分析表明:该类桥梁结构合理,受力明确,力学性能好,能够满足强度和刚度要求,且具有建筑高度小,经济指标高,建造速度快等特点,是一种较好的新型桥梁方案。
Combined with engineering examples, the mechanical properties of externally prestressed steel box girder bridge were analyzed by finite element method. Three sets of software were used to establish the model, and the calculation results of the internal force, stress, deflection and dynamic characteristics of the main control section of the steel box girder were listed and discussed. The analysis shows that the bridges of this kind of bridge are reasonable in structure, clear stress, good mechanical properties, able to meet the requirements of strength and stiffness, and have the characteristics of small building height, high economic index and fast construction speed, which is a good new type of bridge scheme.