Abstract: To arrange the prestressed tendons and anchor devices on the web of box girder conveniently, a theoretical analysis, numerical calculation and model test on local stresses in concrete under anchor devices were performed separately using a typical segmental model, a subrange model and a similar model for the scheme design of Hutiaomen major bridge. The results show that higher concrete stresses occur only in a very small zone under anchor devices, and large prestressing force designed in light of the real bridge does not cause extremely high principal stress and concrete failure. In addition, the measured values of local stresses in concrete in an anchorage zone are comparatively close to their calculated values.