Stress Analysis Of Anchorage Zone And Mechanical Characteristics Of Extradosed Bridge

Since1994, the first extradosed cable-stayed bridge(Odawara Port Bridge) hasbeen build in Janpan.Extradoesed cable-stayed bridge was favored by world’s engineersbecause of it’s couple hardness with softness.As a new bridge structuer system,"lowtower,inflexible girder,cable focus"is it’s supreme feature;but it’s design theory is notperfect,and the analysis of the key parts is not deep,such as the anchorage zone of cableto tower,girder.therefore,this article rely on the maximum span’s extradosedcable-stayed bridge in China—Chongqing jiayue bridge.Firstly,building jiayue bridge’sbeam element and truss element finite model by the software MIDAS/CIVIL,to solvethe initial cable force of the finished bridge state.Secondly,building the soild elementfinite model of jiayue bridge’s steel anchor box by the special software of civil structurenonlinear and detail—MIDAS/FEA,to research it’s stress distribution under themaximun cable force of the finished bridge.And figuer out the finite model’s result tocompare with theoretical formula derived from simplified calculation model of the forcetransmission in steel anchor box,to test the results of the finite model,meanwhile,verifythe theoretical formula derived from the simplified calculation model.