Advantages of box beam bridges: 1. Light weight and steel saving. Since the box beam can more effectively exert the bearing capacity of the steel plate, the orthotropic steel bridge deck and the box beam with thin steel plates as beam ribs and bottom plates can save about 20% of steel. The larger the span, the more it can save. And because the weight of the superstructure is reduced, the cost of the bridge substructure can generally be reduced by 5% to 15%. 2. High bending and torsional rigidity. This is determined by the characteristics of the closed hollow section. When the amount of material is the same, it can provide greater bending and torsional rigidity than other cross-sectional forms, so it is particularly suitable for curved bridges and straight bridges with large eccentric loads. 3. Quick installation. Easy to maintain box beams can be made into large installation units in the factory, thereby reducing the number of connecting bolts on the construction site. It is easy to drag longitudinally or erected by jacking during construction. The box beam has a simple structure and is easy to paint. And because the interior is a closed space, it is easier to resist corrosion. 4. Suitable for making continuous beams.This is because its cross-sectional form can provide almost equal ability to withstand positive and negative bending moments. 5. The structure is novel, the appearance is simple and beautiful.
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