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欧洲的桥梁设计师早在五十年代就对混凝土桥面结构应用箱梁形式发生兴趣。空心箱形断面,因材料的有效布置,不但可承受同等强度的正负弯矩、具有较高的扭矩刚度,而且省材料、重量轻。现在混凝土桥已普遍使用箱梁结构,原因也就是因为重量轻、经济,同时还可以采用工厂生产方式预制构
Bridge designers in Europe were interested in the application of box girders to concrete deck structures as early as the 1950s. Hollow box-shaped cross-section, due to the effective layout of materials, not only can bear the same strength positive and negative bending moment, with high torque stiffness, and the provincial material, light weight. Now the concrete bridge has been widely used box girder structure, the reason is because of light weight, economical, but also can be factory prefabricated