G-M method application in stress analysis of small-radius curved bridge

To simplify the calculation, improve accuracy and solve the problem of the large difference between test value (lateral bending stiffness D_y and integrated tensional rigidity H ) and actual value when drawing a box girder parallel into orthogonal isotropic plate. The unique advantages of orthotropic plate in the bridge structure static analysis are used in this paper. The difficulty of box girder bridge structure simulation method D_y is considered as a breakthrough. According to parallel hollow frame, D_y can be calculated. Equivalent general formula have been derived by match of hollow frame, then it substituted into the H formula which expressed by D_y & D_y and been derived by heterosexual plate theory. Then compare the theoretical analysis of orthotropic plates which simplify the calculation, and improves accuracy of calculation, and been derived by the load test of Suifenhe small-radius curved bridge. The results obtained by this method and the results obtained by the finite element method in good agreement, which simplifying the calculation and improving accuracy of calculation. This method can be applied in stress analysis of other small-radius curved bridge.