Anlysis Of Stress In Anchoring Box Between Cable And Beam Of Cable-Stayed Bridge And Optimiztion Research Of Structure

With the rapid development of bridge construction all over the world, cable-stayed bridge is widely used with its clear actings, crossing ability, good visual effects at home and other advantages. The stresses in anchorage zone, which is a key part in bridge design, is complex. Hence, it is extremely necessary to learn about the distribution of anchorage zone stress. This paper describes the basic structure and transmission of4connection for anchorage zone of cable-stayed bridge (box-and sales-hinged type, anchor pipe and anchor plate). Moreover, the situation of stress in steel anchor box is analyzed with the background of a large cable-stayed bridge across the Yangtze River project.Firstly, we apply the finite element software ANSYS to analysis the bridge’s steel box-girder anchorage structure modeling and stress calculations to understand the overall stress of steel anchor box structure and the stress of plate size and distribution; Then metal thickness of steel anchor box and the local structure is parameter analyzed to work out to the plate thickness and structural changes to the structure of the overall effects of stress. Secondly, steel anchor box bearing plate and contact problem of anchor pad is analyzed. It is introduced that the equivalent thickness method for nonlinear contact element method and the finite element theory. Comparing the equivalent thickness method for nonlinear contact elements and method of calculation results to concluded that which one is preferred to accurate calculation; The last but not the least, working out the best feasible programme of steel-anchor-box with three inside small stiffening ribs to. And testing the feasibility of programme through optimization results before and after verifying.