The Optimization Design On The Superstructure Of The PC Continuous Box Girder Bridge

With the development of high grade highway, prestressed concrete box girder bridges are adopted widely. Structural optimization design is possessed of evident economic value .There is important significance in bringing the structural optimization design to the design of PC continuous box girder bridge. This dissertation is based on the relative datum, sets up the mathematics model which takes the cost of the superstructure as objective function, some mainly requests of the active criterion as restriction, the height of box girder as the design variable and brings the ameliorative enumeration method to the program. Finally optimal outcome is achieved for two different forms of fracture and construction types .Comparing the two results can come to the conclusion that the proposal optimization design project is reasonable and economical.