Abstract
In recent years, steel I-girder bridges with fewer main girders have been widely adopted in Japan. In this design, the weight of the bridge can be reduced, and the thickness of the main girder flange plate is increased. The main girder blocks are welded and assembled onsite instead of being friction joined using high-strength bolts. Since achieving dimensional accuracy is important, accurate prediction is required for predicting the deformations that occur during the welding process. Therefore, in the present study, the idealized explicit finite element method is adopted to accurately predict such deformations. Through the comparison between computational and experimental results, the mechanism of the deformation, which occurs in I-girder bridges, is examined.
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