Research Of Static Mechanical Properties Of Three-Arch-Pylon Cable-Stayed Bridge

Along with the development of cable-stayed bridge construction technology and economy, engineers pay more and more attention to the multispan cable-stayed bridge which could meet to larger spanning capacity, and the PC three-pylon cable-stayed bridges are used more. As for PC three-pylon cable-stayed bridge, how to insure the whole structural stiffness as well as the beautiful appearance under the live load is the key problem. Accordingly, based on the three-arch-pylon cable-stayed bridge of the right branch of Changjiang highway bridge of Maan shan. Build up the finite element model of the whole bridge with Midas/Civil, one large-scale FEM software, and carry out static calculation. Then discuss the stiffness of the middle tower. After that, on the basis of this finite element model, research the mechanical characteristics of the three-pylon cable-stayed bridge through changing support condition, structural arrangement, the stiffness of beam,tower and stay cable, and assistant pier setting. The work aims to provide reference for the design of other three-pylon cable-stayed bridge.