Mechanical features of cable-girder anchorage for cable-stayed bridges with steel box girders I: Theoretical model

For long-span cable-stayed bridges with steel box girders, the load transfer between cables and girders is accomplished by cable-girder anchorage. With the complex load transfer mechanism and stress concentration induced by large load, rational design of cable-girder anchorage is critical to long-span cable-stayed bridges. The cable-girder anchorage of the Sutong Bridge was investigated, and the mechanism of cable-girder anchorage was studied by using theoretical model and model test. The study indicated that the results of theoretical model were in accordance with that of model test, and the availability of theoretical model was demonstrated. The load transfer mechanisms of the main components of cable-girder anchorage are markedly different from each other. The stress concentration in web plate, top and bottom plate is predominant.