2. Economic feasibility: Generally speaking, the cost of steel-concrete bridge is higher than that of traditional concrete bridge, but the cost of PC bridge with corrugated steel webs is lower than that of traditional concrete bridge within the economic span (> > 50m) due to its special structure. According to the popularization and application abroad, the adoption of corrugated steel webs reduces the dead weight by 10-25%, reduces the substructure and technical workload, and thus reduces the whole project cost. According to Japanese calculation, it saves about 8- 12% compared with the traditional concrete box continuous bridge. According to the situation of domestic popularization and use, it saves about 10% year-on-year, so the economic benefit of popularizing this bridge type is remarkable. At the same time, because the main steel members can be prefabricated in the factory, the dead weight of the bridge can be reduced, and the cantilever construction stage can be set longer, which will promote the improvement of construction efficiency. According to the calculation of Juancheng Yellow River Bridge,
3. Industrial and social benefits: Developing low-carbon economy is the mainstream of international future economic development, but it is not enough in China at present. After adopting the steel-concrete structure bridge represented by prestressed concrete continuous box girder bridge with corrugated steel webs, on the one hand, the consumption of concrete and sand can be reduced, and then the damage to the environment can be reduced, which is in line with the national industrial policy. On the other hand, the popularization of bridge steel structure application is conducive to strengthening the domestic demand for steel, thus promoting the development of the national steel industry and alleviating the overcapacity of the steel industry.