与相应的水平加劲梁和不考虑收缩、徐变影响的计算结果比较，差值均在20%以上。
Compared with corresponding horizontal stiffening girder and the computational result without concrete's shrink and creep, the difference is more than 20%.
混凝土的收缩徐变和车辆超载是大跨度连续梁桥主梁下挠严重的主要因素之一。
The creep is the main reasons why the deflection of the girder is larger than that of code.
再次，讨论了预应力、混凝土徐变、箱梁抗弯刚度等对桥梁结构下挠的影响。
Thirdly, pretressing, concrete creep and bending rigidity of box girder are studied to discuss their impacts on the deformation of girder.
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