In the concrete box girder bridge, the concrete is a brittle material, with low ultimate tensile strength and small ultimate tensile deformation. Because the box girder itself is a statically indeterminate structure, the concrete in the tensile zone is very prone to crack due to the load during construction and use. In this paper, the vertical prestress loss of prestressed concrete box girder bridge based on improved genetic algorithm is studied. The research shows that the stress generated by the additional bending moment at the center of the ...
