What are the advantages of corrugated steel webs, and which domestic enterprises can do this at present?

Weight reduction of box girder: Replacing concrete web with corrugated steel plate can reduce the weight of box girder by 20 ~ 30%, thus reducing the engineering quantity and project cost of upper and lower structures by about 10%, thus improving the seismic performance of the structure, which is also one of the advantages that Japan, an earthquake-prone country, sees.

Improve prestress efficiency: due to the folding effect of corrugated steel webs, corrugated steel webs do not bear tensile pressure along the bridge direction, so the prestress efficiency of top and bottom plates will be improved, thus reducing the amount of prestressed steel bars and simplifying the stress analysis.

Improving the shear capacity of web: the common problem of long-span prestressed concrete box girder bridge is the cracking of concrete web. Using corrugated steel webs with high shear capacity to bear the shear force of box girder bridges has fundamentally improved the shear performance of prestressed concrete box girder bridges, which is very targeted for common engineering diseases of PC box girder bridges over 100 meters in China.

The construction is convenient, which improves the construction speed: because there is no need to pour webs, the workload of formwork and concrete pouring can be reduced; Because the box girder is light in weight, the length of segmental construction can be increased, and because corrugated steel webs can be used as hanging baskets for cantilever construction and load-bearing structures for lifting guide beams, these can simplify the construction and speed up the construction.

Henan Dajian Steel Structure Co., Ltd. designed the first Juancheng Yellow River Highway Bridge in China, and its span distribution with corrugated steel webs is 70m+1×1460m+70m, ranking first in the world.