Abstract:In order to obtain the reasonable structural parameters of a ground anchored single-tower and single-span spatial double-cable suspension bridge, the finite element simulation method is used to study the main cable force, the hanger force, the internal force and deformationof the main beam of different rise-span ratio of 1/14, 1/15 and 1/16, main cable anchoring forms of 45o, 60o, 75o, stiffening beam forms of π-type steel beam and steel truss beam of this anchored suspension bridge under the dead load, live load, temperature load. The results show that with the increase of the rise-span ratio, the main cable and the side hanger stress, the internal force and deformation of the main beam, and the bending moment of the tower bottom are gradually reduced. With the increase of the anchoring angle, the back cable force of the main cable, the bending moment and deformation of the main beam, and the bending moment of the tower bottom are reduced, and main cable force of the main span is less affected by the anchoring angle. Appropriately increase the rise-span ratio and the anchoring angle of the main cable to improve stress and reduce deformation of the structure. In the form of steel truss beam section, The main cable force and the hanger force are larger than the π-type steel beam, and the main beam deformation is smaller than that of the π-type steel beam. Relevant research conclusions will provide reference for the formulation of design parameters of such bridges.